Brake disc material prepared from carbon-ceramic composite material and processing technology of brake disc material

Abstract

The invention relates to the technical field of brake disc materials, and discloses a brake disc material prepared from a carbon-ceramic composite material and a processing technology thereof.The processing technology comprises the following steps that phenolic resin, carbon powder, metal oxide, composite carbon fibers and a pore forming agent are evenly mixed and then placed in a mold, and a composite material prefabricated body is obtained through compression molding and cold water demolding; processing the composite material preform to form a carbon-ceramic brake disc rough blank, and then performing carbonization treatment to obtain a carbonized composite material; and mixing the carbonized composite material with silicon powder, carrying out siliconizing treatment, soaking in a protective solution, sintering, taking out, polishing and perforating to obtain the brake disc material prepared from the carbon-ceramic composite material. The composite carbon fiber contains a large number of silicon hydroxyl groups and can be tightly combined with phenolic resin, carbon powder, metal oxide and a pore-forming agent, and the polycarbosilane layer generates a nanoscale silicon carbide phase, so that the mechanical property and wear resistance of the brake disc material prepared from the carbon-ceramic composite material can be improved.

Description

Technical Field

[0001] This invention relates to the field of brake disc material technology, specifically to a brake disc material made of carbon-ceramic composite material and its processing technology. Background Technology

[0002] Carbon-ceramic composites are composite materials formed by combining carbon-based materials (such as carbon fibers) with a ceramic matrix. Their preparation techniques include chemical vapor infiltration and hot pressing. They have advantages such as high strength, high modulus, high hardness, impact resistance, oxidation resistance, high temperature resistance, acid and alkali resistance, and chemical corrosion resistance. They are widely used in fields such as thermal protection of hypersonic aircraft and braking systems of high-speed trains. Carbon-ceramic composites can overcome the disadvantage of friction coefficient decay in static and humid environments. Even in the face of moisture, mold, and oil, carbon-ceramic composites still have high frictional stability, making them a highly competitive new generation of friction materials.

[0003] Molten silicon is infiltrated into carbon fiber-based porous preforms under capillary force, where it reacts with the pyrolytic carbon phase to generate silicon carbide-based carbon-ceramic composites. This process has advantages such as short production cycle, relatively low cost, and high density. However, during the high-temperature silicon infiltration process, the molten silicon directly contacts the carbon fibers and undergoes an ablation reaction, resulting in poor overall mechanical properties of the carbon-ceramic composites. Furthermore, during friction, the uneven distribution of residual silicon within the carbon-ceramic composites leads to a decrease in wear resistance and mechanical properties. Summary of the Invention

[0004] This invention provides a brake disc material prepared from carbon-ceramic composite material and its processing technology, which solves the problems of molten silicon easily undergoing ablation reaction when it comes into direct contact with carbon fibers and the uneven distribution of residual silicon inside the carbon-ceramic composite material.

[0005] The technical solution of the present invention: A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. After uniformly mixing phenolic resin, carbon powder, metal oxide, composite carbon fiber and pore-forming agent, place them in a mold, mold them, and demold them with cold water to obtain a composite material preform; S2. After processing the composite material preform into a carbon-ceramic brake disc blank, it is then subjected to carbonization treatment to obtain a carbonized composite material; S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, immersed in a protective solution, sintered, taken out, and then polished and perforated to obtain the brake disc material prepared by carbon ceramic composite material; Among them, the composite carbon fiber is obtained by surface modification of carbon fiber with silane coupling agent, followed by mixing and reaction with allyl dimethyl silane and alkenyl triethoxysilane. Modified carbon fiber is obtained by synthesizing a porous carbon layer on the surface of carbon fiber, and then reacting it with zirconium oxychloride octahydrate and ammonia.

[0006] Further, in step S1, the mass ratio of phenolic resin, carbon powder, metal oxide, composite carbon fiber and pore-forming agent is (23-27):(25-30):(4-5):(4-6):(0.5-1).

[0007] Furthermore, the metal oxide is selected from any one of aluminum oxide, yttrium oxide, and zirconium oxide.

[0008] Furthermore, the pore-forming agent is selected from polyvinyl butyral ester.

[0009] Furthermore, in step S1, compression molding is carried out in a flat vulcanizing machine, with a compression molding temperature of 170-200℃, a compression molding pressure of 10-15MPa, and a compression molding time of 25-35min.

[0010] Furthermore, in step S1, the mixing temperature is 30-35℃ and the mixing time is 25-30 min.

[0011] Furthermore, in step S2, the carbonization temperature is 900-1200℃ and the carbonization time is 10-30h.

[0012] Furthermore, in step S3, the silicon diffusion process is carried out in a graphite crucible. The specific process of silicon diffusion is as follows: the silicon diffusion atmosphere is nitrogen, the temperature is 1420-1450℃, and the time is 3-5h.

[0013] Furthermore, in step S3, the mass ratio of the carbonized composite material to silicon powder is (1.3-1.6):1.

[0014] Furthermore, in step S3, the protective solution is a 30-40% aluminum dihydrogen phosphate solution.

[0015] Furthermore, in step S3, the sintering temperature is 200-300℃ and the sintering time is 20-30min.

[0016] Furthermore, the composite carbon fiber is specifically prepared by the following steps: A1. Add carbon fiber and tannic acid to ethanol, stir evenly, add glucose, stir evenly, filter, wash, dry, place in a tube furnace, add potassium hydroxide solution, purge with nitrogen, carbonize at 800-900℃ for 4-5h, cool to room temperature, take out, wash, dry, to obtain carbon fiber coated with porous carbon layer. A2. Add zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers to deionized water, stir evenly, add ammonia, glycine and potassium chloride, stir evenly, place in a reaction vessel, carry out hydrothermal reaction at 170-190℃ for 20-22h, cool to room temperature, filter, wash and dry to obtain modified carbon fibers. A3. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add silane coupling agent, stir until the reaction is complete, filter, wash and dry to obtain double bond modified carbon fiber. A4. Dimethylallylsilane, vinyltriethoxysilane, and double-bonded modified carbon fibers were added to deionized water and ethanol, stirred until homogeneous, benzoyl peroxide was added, and after the reaction was completed, the mixture was filtered, washed, and dried to obtain composite carbon fibers.

[0017] Furthermore, in the A1 reaction process described above, tannic acid contains a large number of phenolic hydroxyl groups, which have good adhesion. As a binder, it allows the carbon precursor glucose to be coated onto the carbon fiber surface through tannic acid. After high-temperature carbonization, the glucose decomposes to form a dense carbon layer. Potassium hydroxide acts as an activator, and the potassium hydroxide molecules decompose to form channels on the surface of the dense carbon layer, thereby achieving the coating of a porous carbon layer on the carbon fiber surface and obtaining carbon fibers coated with a porous carbon layer.

[0018] Furthermore, in the A2 reaction process described above, the carbon fiber surface coated with a porous carbon layer contains a large number of porous structures, which can adsorb zirconium ions from zirconium oxychloride octahydrate onto the carbon fiber surface coated with a porous carbon layer. Ammonia water acts as a precipitant, which can react with zirconium ions to form zirconium hydroxide precipitate. Zirconium hydroxide precipitate is formed on the surface and in the pores of the carbon fiber coated with a porous carbon layer. After hydrothermal reaction, the formed zirconium hydroxide precipitate decomposes to form zirconium oxide crystals. Glycine and potassium chloride can regulate the crystal phase of zirconium dioxide, thereby forming nano-zirconium dioxide on the surface and in the pores of the carbon fiber coated with a porous carbon layer, resulting in modified carbon fiber.

[0019] Furthermore, during the A3 reaction process described above, the silanol groups generated by the hydrolysis of the silane coupling agent can chemically bond with the hydroxyl groups on the surface of the modified carbon fiber, thereby grafting the silane coupling agent onto the surface of the modified carbon fiber and obtaining double-bonded modified carbon fiber.

[0020] Furthermore, during the A4 reaction process described above, under the action of benzoyl peroxide, dimethylallylsilane and vinyltriethoxysilane can undergo copolymerization with the double bonds contained in the double-bonded modified carbon fiber, thereby forming a polycarbosilane layer on the surface of the modified carbon fiber and obtaining composite carbon fiber.

[0021] Further, in step A1, the mass ratio of carbon fiber, tannic acid, ethanol, glucose and potassium hydroxide solution is (2-3):(0.6-0.8):(80-90):(1.5-2):(1-1.5).

[0022] Further, in step A2, the mass ratio of zirconium oxychloride octahydrate, carbon fiber coated with porous carbon layer, deionized water, ammonia water, glycine and potassium chloride is (1-1.5):(2-2.5):(100-120):(1.5-2):(0.3-0.5):(0.7-0.9).

[0023] Further, in step A3, the mass ratio of modified carbon fiber, ethanol, deionized water and silane coupling agent is (2.5-3):(90-100):(30-40):(1-1.2).

[0024] Further, in step A4, the mass ratio of dimethylallylsilane, vinyltriethoxysilane, double-bonded modified carbon fiber, deionized water, ethanol and benzoyl peroxide is (1-1.2):(1.1-1.3):(3-3.5):(90-100):(30-40):(0.5-0.7).

[0025] The present invention has the following beneficial effects: (1) In the technical solution of the present invention, a porous carbon layer is coated on the surface of carbon fiber. On the one hand, the porous carbon layer formed serves as a protective barrier for carbon fiber. During the silicon infiltration process, it can effectively prevent the diffusion of silicon atoms into the interior of carbon fiber, prevent the molten silicon from directly contacting the carbon fiber and causing an ablation reaction, weaken the toughness and strength of the carbon fiber, and thus improve the mechanical properties of the carbon-ceramic composite material. Moreover, the bonding force between the porous carbon layer and the carbon fiber is strong. When the carbon-ceramic composite material is under stress, it absorbs energy through interface slippage, further improving the toughness of the carbon-ceramic composite material. On the other hand, the porous carbon layer gives the carbon fiber a uniform and uniformly sized porous structure. During the silicon infiltration process, the molten silicon can be uniformly distributed inside the carbon-ceramic composite material through the uniform and uniformly sized pore structure of the porous carbon layer, avoiding uneven distribution of silicon atoms in the carbon-ceramic composite material, which would lead to a decrease in the wear resistance and mechanical properties of the carbon-ceramic composite material.

[0026] (2) In the technical solution of the present invention, nano-zirconia is formed on the surface and in the pores of carbon fiber coated with porous carbon layer. On the one hand, nano-zirconia is synthesized in the pores of porous carbon layer as a supporting skeleton of porous carbon layer, which can absorb and weaken the attraction generated during the molding process, and prevent the pore structure of porous carbon layer from collapsing under external force, affecting the wear resistance and mechanical properties of carbon ceramic composite material. On the other hand, during the silicon infiltration process, molten silicon can form zirconium silicate phase with the formed nano-zirconia, which fills the micropores in carbon ceramic composite material, reduces internal defects of material, improves the density of brake disc material prepared by carbon ceramic composite material, and zirconium silicate has high wear resistance and high temperature resistance, which can resist the cutting wear of brake disc material.

[0027] (3) In the technical solution of the present invention, the silane coupling agent is grafted onto the surface of the modified carbon fiber, which imparts reactive double bonds to the modified carbon fiber, which is conducive to the formation of a polycarbon silane layer on the surface of the modified carbon fiber, providing a large number of silanol groups, improving the bonding force between the composite carbon fiber matrix and phenolic resin, carbon powder, metal oxide and pore-forming agent, and is conducive to the formation of a denser carbon ceramic composite material.

[0028] (4) In the technical solution of the present invention, dimethylallylsilane and vinyltriethoxysilane can react with double bond modified carbon fibers to form a polycarbosilane layer on the surface of the modified carbon fibers. The polycarbosilane layer contains a large number of silanol groups, which improves the bonding force between the composite carbon fiber matrix and phenolic resin, carbon powder, metal oxide and pore-forming agent, thereby forming a denser carbon-ceramic composite material. In the process of carbonization and silicon infiltration, the polycarbosilane layer can generate nanoscale silicon carbide phase by thermal decomposition, which fills the gaps in the carbon-ceramic composite material, further improving the density of the carbon-ceramic composite material and improving the mechanical properties and wear resistance of the brake disc material prepared by the carbon-ceramic composite material. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] The raw materials used in the embodiments of this invention are shown below, and all reagents used are analytical grade.

[0031] The metal oxide is aluminum oxide with a particle size of 15 μm; the carbon powder has a particle size of 10 μm; the silicon powder has a particle size of 10 μm; and the pore-forming agent is polyvinyl butyral.

[0032] The carbon fiber has a length of 0.4 mm and an aspect ratio of 60:1.

[0033] Dimethyl allylsilane (A935144), vinyltriethoxysilane (T742512), and phenolic resin (P875865) were all purchased from Shanghai Maclean Biochemical Technology Co., Ltd.

[0034] The silane coupling agent is KH570 (γ-methacryloyloxypropyltrimethoxysilane).

[0035] Example 1 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 23:25:4:4:0.5, and then mixed at 30°C for 25 minutes. The mixture is placed in a mold, molded, and then demolded with cold water to obtain a composite material preform. The molding is carried out in a flat vulcanizing machine at a molding temperature of 170°C, a molding pressure of 10 MPa, and a molding time of 25 minutes. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 900℃ for 10 hours to obtain a carbonized composite material; wherein, the specific processing to form the carbon-ceramic brake disc blank includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 30% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is taken out, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1420℃, and the time is 3 hours; the mass ratio of carbonized composite material to silicon powder is 1.3:1; the sintering temperature is 200℃, and the sintering time is 20 minutes.

[0036] Composite carbon fiber is prepared by the following steps: A1. Carbon fibers and tannic acid were added to ethanol and stirred until homogeneous. Glucose was added, and the mixture was stirred at 70°C for 30 min. After filtration, the mixture was washed three times with deionized water and dried in an oven at 70°C for 10 min. The mixture was then placed in a tube furnace, and a 30% potassium hydroxide solution was added. Nitrogen gas was introduced, and the mixture was carbonized at 800°C for 4 h. After cooling to room temperature, the mixture was removed, washed three times with deionized water, and dried in an oven at 70°C for 10 min to obtain carbon fibers coated with a porous carbon layer. The mass ratio of carbon fibers, tannic acid, ethanol, glucose, and potassium hydroxide solution was 2:0.6:80:1.5:1. A2. Zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers were added to deionized water and stirred evenly. Ammonia, glycine, and potassium chloride were added, and the mixture was stirred at 85°C for 10 min. The mixture was then placed in a reaction vessel and subjected to a hydrothermal reaction at 170°C for 20 h. After cooling to room temperature, the mixture was filtered, washed three times with deionized water, and dried in an oven at 80°C for 3 h to obtain modified carbon fibers. The mass ratio of zirconium oxychloride octahydrate, carbon fibers coated with porous carbon layers, deionized water, ammonia, glycine, and potassium chloride was 1:2:100:1.5:0.3:0.7. A3. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add KH570, stir and react at 70℃ for 30 min, filter, wash 3 times with deionized water, and dry in an oven at 70℃ for 10 min to obtain double-bonded modified carbon fiber; the mass ratio of modified carbon fiber, ethanol, deionized water and KH570 is 2.5:90:30:1; A4. Dimethylallylsilane, vinyltriethoxysilane, and double-bonded modified carbon fibers were added to deionized water and ethanol, stirred at 70°C for 30 min, then benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fibers. The mass ratio of dimethylallylsilane, vinyltriethoxysilane, double-bonded modified carbon fibers, deionized water, ethanol, and benzoyl peroxide was 1:1.1:3:90:30:0.5.

[0037] Example 2 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 25:27:4.5:5:0.8, and then mixed at 33℃ for 28 minutes. The mixture is placed in a mold, and then molded by compression molding. After demolding with cold water, a composite material preform is obtained. Compression molding is carried out in a flat vulcanizing machine at a molding temperature of 185℃, a molding pressure of 13MPa, and a molding time of 30 minutes. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 1100℃ for 20 hours to obtain a carbonized composite material; wherein, the specific processing to form the carbon-ceramic brake disc blank includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 35% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is taken out, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1435℃, and the time is 4 hours; the mass ratio of carbonized composite material to silicon powder is 1.4:1; the sintering temperature is 250℃, and the sintering time is 25 minutes.

[0038] Composite carbon fiber is prepared by the following steps: A1. Carbon fibers and tannic acid were added to ethanol and stirred until homogeneous. Glucose was added, and the mixture was stirred at 70°C for 30 min. After filtration, the mixture was washed three times with deionized water and dried in an oven at 70°C for 10 min. The mixture was then placed in a tube furnace, and a 30% potassium hydroxide solution was added. Nitrogen gas was introduced, and the mixture was carbonized at 850°C for 4.5 h. After cooling to room temperature, the mixture was removed, washed three times with deionized water, and dried in an oven at 70°C for 10 min to obtain carbon fibers coated with a porous carbon layer. The mass ratio of carbon fibers, tannic acid, ethanol, glucose, and potassium hydroxide solution was 2.5:0.7:85:1.8:1.3. A2. Zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers were added to deionized water and stirred evenly. Ammonia, glycine, and potassium chloride were added, and the mixture was stirred at 85°C for 10 min. The mixture was then placed in a reaction vessel and subjected to a hydrothermal reaction at 180°C for 21 h. After cooling to room temperature, the mixture was filtered, washed three times with deionized water, and dried in an oven at 80°C for 3 h to obtain modified carbon fibers. The mass ratio of zirconium oxychloride octahydrate, carbon fibers coated with porous carbon layers, deionized water, ammonia, glycine, and potassium chloride was 1.3:2.3:110:1.8:1.4:0.8. A3. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add KH570, stir and react at 70℃ for 30 min, filter, wash 3 times with deionized water, and dry in an oven at 70℃ for 10 min to obtain double-bonded modified carbon fiber; the mass ratio of modified carbon fiber, ethanol, deionized water and KH570 is 2.8:95:35:1.1; A4. Dimethylallylsilane, vinyltriethoxysilane, and double-bonded modified carbon fibers were added to deionized water and ethanol, stirred at 70°C for 30 min, then benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fibers. The mass ratio of dimethylallylsilane, vinyltriethoxysilane, double-bonded modified carbon fibers, deionized water, ethanol, and benzoyl peroxide was 1.1:1.2:3.3:95:35:0.6.

[0039] Example 3 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 27:30:5:6:1 and mixed at 35°C for 30 min. The mixture is then placed in a mold, molded, and demolded with cold water to obtain a composite material preform. The molding process is carried out in a flat vulcanizing machine at a molding temperature of 200°C, a molding pressure of 15 MPa, and a molding time of 35 min. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 1200℃ for 30 hours to obtain a carbonized composite material; wherein, the processing to form the carbon-ceramic brake disc blank specifically includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 40% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is removed, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1450℃, and the time is 5 hours; the mass ratio of carbonized composite material to silicon powder is 1.6:1; the sintering temperature is 300℃, and the sintering time is 30 minutes.

[0040] Composite carbon fiber is prepared by the following steps: A1. Carbon fibers and tannic acid were added to ethanol and stirred until homogeneous. Glucose was added, and the mixture was stirred at 70°C for 30 minutes. After filtration, the mixture was washed three times with deionized water and dried in an oven at 70°C for 10 minutes. The mixture was then placed in a tube furnace, and a 30% potassium hydroxide solution was added. Nitrogen gas was introduced, and the mixture was carbonized at 900°C for 5 hours. After cooling to room temperature, the mixture was removed, washed three times with deionized water, and dried in an oven at 70°C for 10 minutes to obtain carbon fibers coated with a porous carbon layer. The mass ratio of carbon fibers, tannic acid, ethanol, glucose, and potassium hydroxide solution was 3:0.8:90:2:1.5. A2. Zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers were added to deionized water and stirred evenly. Ammonia, glycine, and potassium chloride were added, and the mixture was stirred at 85°C for 10 min. The mixture was then placed in a reaction vessel and subjected to a hydrothermal reaction at 190°C for 22 h. After cooling to room temperature, the mixture was filtered, washed three times with deionized water, and dried in an oven at 80°C for 3 h to obtain modified carbon fibers. The mass ratio of zirconium oxychloride octahydrate, carbon fibers coated with porous carbon layers, deionized water, ammonia, glycine, and potassium chloride was 1.5:2.5:120:2:0.5:0.9. A3. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add KH570, stir and react at 70℃ for 30 min, filter, wash 3 times with deionized water, and dry in an oven at 70℃ for 10 min to obtain double-bonded modified carbon fiber; the mass ratio of modified carbon fiber, ethanol, deionized water and KH570 is 3:100:40:1.2. A4. Dimethylallylsilane, vinyltriethoxysilane, and double-bonded modified carbon fibers were added to deionized water and ethanol, stirred at 70°C for 30 min, then benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fibers. The mass ratio of dimethylallylsilane, vinyltriethoxysilane, double-bonded modified carbon fibers, deionized water, ethanol, and benzoyl peroxide was 1.2:1.3:3.5:100:40:0.7.

[0041] Comparative Example 1 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 27:30:5:6:1 and mixed at 35°C for 30 min. The mixture is then placed in a mold, molded, and demolded with cold water to obtain a composite material preform. The molding process is carried out in a flat vulcanizing machine at a molding temperature of 200°C, a molding pressure of 15 MPa, and a molding time of 35 min. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 1200℃ for 30 hours to obtain a carbonized composite material; wherein, the processing to form the carbon-ceramic brake disc blank specifically includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 40% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is removed, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1450℃, and the time is 5 hours; the mass ratio of carbonized composite material to silicon powder is 1.6:1; the sintering temperature is 300℃, and the sintering time is 30 minutes.

[0042] Composite carbon fiber is prepared by the following steps: A1. Zirconium oxychloride octahydrate and carbon fiber were added to deionized water and stirred evenly. Ammonia, glycine and potassium chloride were added, and the mixture was stirred at 85°C for 10 min. The mixture was placed in a reaction vessel and subjected to hydrothermal reaction at 190°C for 22 h. After cooling to room temperature, the mixture was filtered, washed three times with deionized water, and dried in an oven at 80°C for 3 h to obtain modified carbon fiber. The mass ratio of zirconium oxychloride octahydrate, carbon fiber, deionized water, ammonia, glycine and potassium chloride was 1.5:2.5:120:2:0.5:0.9. A2. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add KH570, stir and react at 70℃ for 30 min, filter, wash 3 times with deionized water, and dry in an oven at 70℃ for 10 min to obtain double-bonded modified carbon fiber; the mass ratio of modified carbon fiber, ethanol, deionized water and KH570 is 3:100:40:1.2; A3. Dimethylallylsilane, vinyltriethoxysilane, and double-bonded modified carbon fibers were added to deionized water and ethanol, stirred at 70°C for 30 min, then benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fibers. The mass ratio of dimethylallylsilane, vinyltriethoxysilane, double-bonded modified carbon fibers, deionized water, ethanol, and benzoyl peroxide was 1.2:1.3:3.5:100:40:0.7.

[0043] Comparative Example 2 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 27:30:5:6:1 and mixed at 35°C for 30 min. The mixture is then placed in a mold, molded, and demolded with cold water to obtain a composite material preform. The molding process is carried out in a flat vulcanizing machine at a molding temperature of 200°C, a molding pressure of 15 MPa, and a molding time of 35 min. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 1200℃ for 30 hours to obtain a carbonized composite material; wherein, the processing to form the carbon-ceramic brake disc blank specifically includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 40% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is removed, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1450℃, and the time is 5 hours; the mass ratio of carbonized composite material to silicon powder is 1.6:1; the sintering temperature is 300℃, and the sintering time is 30 minutes.

[0044] Composite carbon fiber is prepared by the following steps: A1. Carbon fibers and tannic acid were added to ethanol and stirred until homogeneous. Glucose was added, and the mixture was stirred at 70°C for 30 minutes. After filtration, the mixture was washed three times with deionized water and dried in an oven at 70°C for 10 minutes. The mixture was then placed in a tube furnace, and a 30% potassium hydroxide solution was added. Nitrogen gas was introduced, and the mixture was carbonized at 900°C for 5 hours. After cooling to room temperature, the mixture was removed, washed three times with deionized water, and dried in an oven at 70°C for 10 minutes to obtain carbon fibers coated with a porous carbon layer. The mass ratio of carbon fibers, tannic acid, ethanol, glucose, and potassium hydroxide solution was 3:0.8:90:2:1.5. A2. Add the carbon fibers coated with porous carbon layers to deionized water and ethanol, stir evenly, add KH570, stir and react at 70℃ for 30 min, filter, wash three times with deionized water, and dry in an oven at 70℃ for 10 min to obtain carbon fibers with double bonded porous carbon layers; the mass ratio of carbon fibers coated with porous carbon layers, ethanol, deionized water and KH570 is 3:100:40:1.2. A3. Dimethylallylsilane, vinyltriethoxysilane, and carbon fibers with double-bonded porous carbon layers were added to deionized water and ethanol, stirred at 70°C for 30 min, then benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fibers. The mass ratio of dimethylallylsilane, vinyltriethoxysilane, carbon fibers with double-bonded porous carbon layers, deionized water, ethanol, and benzoyl peroxide was 1.2:1.3:3.5:100:40:0.7.

[0045] Comparative Example 3 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 27:30:5:6:1 and mixed at 35°C for 30 min. The mixture is then placed in a mold, molded, and demolded with cold water to obtain a composite material preform. The molding process is carried out in a flat vulcanizing machine at a molding temperature of 200°C, a molding pressure of 15 MPa, and a molding time of 35 min. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 1200℃ for 30 hours to obtain a carbonized composite material; wherein, the processing to form the carbon-ceramic brake disc blank specifically includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 40% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is removed, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1450℃, and the time is 5 hours; the mass ratio of carbonized composite material to silicon powder is 1.6:1; the sintering temperature is 300℃, and the sintering time is 30 minutes.

[0046] Composite carbon fiber is prepared by the following steps: A1. Carbon fibers and tannic acid were added to ethanol and stirred until homogeneous. Glucose was added, and the mixture was stirred at 70°C for 30 minutes. After filtration, the mixture was washed three times with deionized water and dried in an oven at 70°C for 10 minutes. The mixture was then placed in a tube furnace, and a 30% potassium hydroxide solution was added. Nitrogen gas was introduced, and the mixture was carbonized at 900°C for 5 hours. After cooling to room temperature, the mixture was removed, washed three times with deionized water, and dried in an oven at 70°C for 10 minutes to obtain carbon fibers coated with a porous carbon layer. The mass ratio of carbon fibers, tannic acid, ethanol, glucose, and potassium hydroxide solution was 3:0.8:90:2:1.5. A2. Zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers were added to deionized water and stirred evenly. Ammonia, glycine, and potassium chloride were added, and the mixture was stirred at 85°C for 10 min. The mixture was then placed in a reaction vessel and subjected to a hydrothermal reaction at 190°C for 22 h. After cooling to room temperature, the mixture was filtered, washed three times with deionized water, and dried in an oven at 80°C for 3 h to obtain modified carbon fibers. The mass ratio of zirconium oxychloride octahydrate, carbon fibers coated with porous carbon layers, deionized water, ammonia, glycine, and potassium chloride was 1.5:2.5:120:2:0.5:0.9. A3. Dimethylallylsilane, vinyltriethoxysilane, and modified carbon fiber were added to deionized water and ethanol, stirred at 70°C for 30 min, benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fiber. The mass ratio of dimethylallylsilane, vinyltriethoxysilane, modified carbon fiber, deionized water, ethanol, and benzoyl peroxide was 1.2:1.3:3.5:100:40:0.7.

[0047] Comparative Example 4 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 27:30:5:6:1 and mixed at 35°C for 30 min. The mixture is then placed in a mold, molded, and demolded with cold water to obtain a composite material preform. The molding process is carried out in a flat vulcanizing machine at a molding temperature of 200°C, a molding pressure of 15 MPa, and a molding time of 35 min. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 1200℃ for 30 hours to obtain a carbonized composite material; wherein, the processing to form the carbon-ceramic brake disc blank specifically includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 40% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is removed, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1450℃, and the time is 5 hours; the mass ratio of carbonized composite material to silicon powder is 1.6:1; the sintering temperature is 300℃, and the sintering time is 30 minutes.

[0048] Composite carbon fiber is prepared by the following steps: A1. Carbon fibers and tannic acid were added to ethanol and stirred until homogeneous. Glucose was added, and the mixture was stirred at 70°C for 30 minutes. After filtration, the mixture was washed three times with deionized water and dried in an oven at 70°C for 10 minutes. The mixture was then placed in a tube furnace, and a 30% potassium hydroxide solution was added. Nitrogen gas was introduced, and the mixture was carbonized at 900°C for 5 hours. After cooling to room temperature, the mixture was removed, washed three times with deionized water, and dried in an oven at 70°C for 10 minutes to obtain carbon fibers coated with a porous carbon layer. The mass ratio of carbon fibers, tannic acid, ethanol, glucose, and potassium hydroxide solution was 3:0.8:90:2:1.5. A2. Zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers were added to deionized water and stirred evenly. Ammonia, glycine, and potassium chloride were added, and the mixture was stirred at 85°C for 10 min. The mixture was then placed in a reaction vessel and subjected to a hydrothermal reaction at 190°C for 22 h. After cooling to room temperature, the mixture was filtered, washed three times with deionized water, and dried in an oven at 80°C for 3 h to obtain modified carbon fibers. The mass ratio of zirconium oxychloride octahydrate, carbon fibers coated with porous carbon layers, deionized water, ammonia, glycine, and potassium chloride was 1.5:2.5:120:2:0.5:0.9. A3. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add KH570, stir and react at 70℃ for 30 min, filter, wash 3 times with deionized water, and dry in an oven at 70℃ for 10 min to obtain double-bonded modified carbon fiber; the mass ratio of modified carbon fiber, ethanol, deionized water and KH570 is 3:100:40:1.2. A4. Vinyltriethoxysilane and double-bonded modified carbon fiber were added to deionized water and ethanol, stirred at 70°C for 30 min, benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fiber. The mass ratio of vinyltriethoxysilane, double-bonded modified carbon fiber, deionized water, ethanol and benzoyl peroxide was 2.5:3.5:100:40:0.7.

[0049] Comparative Example 5 A processing technology for a brake disc material made of carbon-ceramic composite material includes the following steps: S1. Phenolic resin, carbon powder, alumina, composite carbon fiber and polyvinyl butyral ester are mixed in a mass ratio of 27:30:5:6:1 and mixed at 35°C for 30 min. The mixture is then placed in a mold, molded, and demolded with cold water to obtain a composite material preform. The molding process is carried out in a flat vulcanizing machine at a molding temperature of 200°C, a molding pressure of 15 MPa, and a molding time of 35 min. S2. After processing the composite material preform into a carbon-ceramic brake disc blank, carbonize it at 1200℃ for 30 hours to obtain a carbonized composite material; wherein, the processing to form the carbon-ceramic brake disc blank specifically includes: deburring, processing of heat dissipation holes on the disc surface, and processing of side ventilation holes. S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, and then immersed in a 40% aluminum dihydrogen phosphate solution for 10 minutes. After immersion, it is removed, sintered, polished, and perforated to obtain a brake disc material made of carbon-ceramic composite material. The silicon infiltration treatment is carried out in a graphite crucible. The specific process of silicon infiltration treatment is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1450℃, and the time is 5 hours; the mass ratio of carbonized composite material to silicon powder is 1.6:1; the sintering temperature is 300℃, and the sintering time is 30 minutes.

[0050] Composite carbon fiber is prepared by the following steps: A1. Carbon fibers and tannic acid were added to ethanol and stirred until homogeneous. Glucose was added, and the mixture was stirred at 70°C for 30 minutes. After filtration, the mixture was washed three times with deionized water and dried in an oven at 70°C for 10 minutes. The mixture was then placed in a tube furnace, and a 30% potassium hydroxide solution was added. Nitrogen gas was introduced, and the mixture was carbonized at 900°C for 5 hours. After cooling to room temperature, the mixture was removed, washed three times with deionized water, and dried in an oven at 70°C for 10 minutes to obtain carbon fibers coated with a porous carbon layer. The mass ratio of carbon fibers, tannic acid, ethanol, glucose, and potassium hydroxide solution was 3:0.8:90:2:1.5. A2. Zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers were added to deionized water and stirred evenly. Ammonia, glycine, and potassium chloride were added, and the mixture was stirred at 85°C for 10 min. The mixture was then placed in a reaction vessel and subjected to a hydrothermal reaction at 190°C for 22 h. After cooling to room temperature, the mixture was filtered, washed three times with deionized water, and dried in an oven at 80°C for 3 h to obtain modified carbon fibers. The mass ratio of zirconium oxychloride octahydrate, carbon fibers coated with porous carbon layers, deionized water, ammonia, glycine, and potassium chloride was 1.5:2.5:120:2:0.5:0.9. A3. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add KH570, stir and react at 70℃ for 30 min, filter, wash 3 times with deionized water, and dry in an oven at 70℃ for 10 min to obtain double-bonded modified carbon fiber; the mass ratio of modified carbon fiber, ethanol, deionized water and KH570 is 3:100:40:1.2. A4. Dimethylallylsilane and double-bonded modified carbon fibers were added to deionized water and ethanol, stirred at 70°C for 30 min, benzoyl peroxide was added, and the mixture was stirred at 70°C for 48 h. After filtration, the mixture was washed three times with deionized water and dried in an oven at 80°C for 15 min to obtain composite carbon fibers. The mass ratio of dimethylallylsilane, double-bonded modified carbon fibers, deionized water, ethanol and benzoyl peroxide was 2.5:3.5:100:40:0.7.

[0051] The performance of brake disc materials prepared from the carbon-ceramic composite materials prepared in Examples 1-3 and Comparative Examples 1-5 was tested.

[0052] Mechanical performance testing: The bending strength, impact toughness and tensile strength of the brake disc material made of the carbon-ceramic composite material prepared above were tested according to T / CAAMTB 09-2019 Passenger Car Brake Disc Product Standard and Test Method.

[0053] Wear resistance test: The brake disc material prepared by the carbon-ceramic composite material was placed in a high-temperature friction and wear tester (MMU-5G). The wear pair was GCr15 steel balls, the load was 100N, the speed was 0.3m / s, the sliding distance was 200m, and the friction coefficient was recorded.

[0054] The test results are shown in Table 1.

[0055] Table 1. Performance tests of brake discs prepared from carbon-ceramic composite materials in Examples 1-3 and Comparative Examples 1-5 As can be seen from the data in Table 1, the brake disc material prepared using the carbon-ceramic composite materials prepared in Examples 1-3 has high mechanical strength and wear resistance.

[0056] Comparative Example 1 replaced the carbon fibers coated with porous carbon layers with composite carbon fibers prepared from carbon fibers to prepare brake disc materials made of carbon-ceramic composite materials. The mechanical properties and wear resistance of the materials decreased, demonstrating that coating the carbon fiber surface with a porous carbon layer, as a protective barrier for the carbon fiber, can effectively hinder the diffusion of silicon atoms into the interior of the carbon fiber during the silicon infiltration process. This prevents the molten silicon from directly contacting the carbon fiber and causing an ablation reaction, thus weakening the toughness and strength of the carbon fiber and improving the mechanical properties of the carbon-ceramic composite material. Furthermore, the porous carbon layer endows the carbon fiber with a uniform and uniformly sized porous structure. During the silicon infiltration process, the molten silicon can be evenly distributed inside the carbon-ceramic composite material through the uniform and uniformly sized pore structure of the porous carbon layer, avoiding uneven distribution of silicon atoms in the carbon-ceramic composite material, which would otherwise lead to a decrease in the wear resistance and mechanical properties of the carbon-ceramic composite material.

[0057] Comparative Example 2 showed that replacing the modified carbon fiber with carbon fiber coated with a porous carbon layer to prepare a composite carbon fiber was used to prepare a brake disc material made of carbon-ceramic composite material. The mechanical properties and wear resistance of the composite material decreased, which proved that the formation of nano-zirconia on the surface and in the pores of the carbon fiber coated with a porous carbon layer, as a supporting skeleton of the porous carbon layer, can absorb and weaken the attraction generated during the molding process, and prevent the pore structure of the porous carbon layer from collapsing under the action of external force, thus affecting the wear resistance and mechanical properties of the carbon-ceramic composite material. In addition, during the silicon infiltration process, the molten silicon can form a zirconium silicate phase with the formed nano-zirconia, which fills the micropores in the carbon-ceramic composite material, reduces internal defects in the material, and improves the density of the brake disc material made of carbon-ceramic composite material. Furthermore, zirconium silicate has high wear resistance and high temperature resistance, and can resist the cutting wear of the brake disc material.

[0058] Comparative Example 3 showed that replacing the double-bonded modified carbon fibers with composite carbon fibers prepared from modified carbon fibers resulted in a decrease in the mechanical properties and wear resistance of brake discs made from carbon-ceramic composite materials. This demonstrates that grafting silane coupling agents onto the surface of modified carbon fibers imparts reactive double bonds, which facilitates the formation of a polycarbosilane layer on the surface of the modified carbon fibers. This provides a large number of silanol groups, improves the bonding force between the composite carbon fiber matrix and phenolic resin, carbon powder, metal oxides, and pore-forming agents, and promotes the formation of a denser carbon-ceramic composite material, thereby improving the mechanical properties and wear resistance of the carbon-ceramic composite material.

[0059] Comparative Example 4, where dimethylallylsilane was replaced by vinyltriethoxysilane at equal mass, and Comparative Example 5, where vinyltriethoxysilane was replaced by dimethylallylsilane at equal mass, were used to prepare composite carbon fibers for brake discs made from carbon-ceramic composite materials. The mechanical properties and wear resistance of these composites decreased, demonstrating that dimethylallylsilane and vinyltriethoxysilane can react with double-bonded modified carbon fibers to form a polycarbosilane layer on the surface of the modified carbon fibers. This polycarbosilane layer contains a large number of silanol groups, which improves the bonding force between the composite carbon fiber matrix and the phenolic resin, carbon powder, metal oxides, and pore-forming agent, thus forming a denser carbon-ceramic composite material. Furthermore, during the carbonization and silicon infiltration process, the polycarbosilane layer decomposes upon heating to produce nanoscale silicon carbide phases, which fill the gaps in the carbon-ceramic composite material, further improving the density of the carbon-ceramic composite material and enhancing the mechanical properties and wear resistance of the brake disc material prepared from it.

[0060] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0061] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. A processing technology for brake disc material prepared from carbon-ceramic composite material, characterized in that, Includes the following steps: S1. After uniformly mixing phenolic resin, carbon powder, metal oxide, composite carbon fiber and pore-forming agent, place them in a mold, mold them, and demold them with cold water to obtain a composite material preform; S2. After processing the composite material preform into a carbon-ceramic brake disc blank, it is then subjected to carbonization treatment to obtain a carbonized composite material; S3. The carbonized composite material is mixed with silicon powder, subjected to silicon infiltration treatment, immersed in a protective solution, sintered, taken out, and then polished and perforated to obtain the brake disc material prepared by carbon ceramic composite material; The composite carbon fiber is obtained by surface modification of carbon fiber with silane coupling agent, followed by reaction with dimethylallylsilane and vinyltriethoxysilane. The modified carbon fiber is obtained by synthesizing a porous carbon layer on the surface of carbon fiber, and then reacting it with zirconium oxychloride octahydrate and ammonia.

2. The processing technology of the brake disc material prepared from a carbon-ceramic composite material according to claim 1, characterized in that, The composite carbon fiber is specifically prepared by the following steps: A1. Add carbon fiber and tannic acid to ethanol, stir evenly, add glucose, stir evenly, filter, wash, dry, place in a tube furnace, add potassium hydroxide solution, purge with nitrogen, carbonize at 800-900℃ for 4-5h, cool to room temperature, take out, wash, dry, to obtain carbon fiber coated with porous carbon layer. A2. Add zirconium oxychloride octahydrate and carbon fibers coated with porous carbon layers to deionized water, stir evenly, add ammonia, glycine and potassium chloride, stir evenly, place in a reaction vessel, carry out hydrothermal reaction at 170-190℃ for 20-22h, cool to room temperature, filter, wash and dry to obtain modified carbon fibers. A3. Add the modified carbon fiber to deionized water and ethanol, stir evenly, add silane coupling agent, stir until the reaction is complete, filter, wash and dry to obtain double bond modified carbon fiber. A4. Dimethylallylsilane, vinyltriethoxysilane, and double-bonded modified carbon fibers were added to deionized water and ethanol, stirred until homogeneous, benzoyl peroxide was added, and after the reaction was completed, the mixture was filtered, washed, and dried to obtain composite carbon fibers.

3. The processing technology of the brake disc material prepared from a carbon-ceramic composite material according to claim 2, characterized in that, In step A1, the mass ratio of the carbon fiber, tannic acid, ethanol, glucose and potassium hydroxide solution is (2-3):(0.6-0.8):(80-90):(1.5-2):(1-1.5).

4. The processing technology of the brake disc material prepared from a carbon-ceramic composite material according to claim 2, characterized in that, In step A2, the mass ratio of zirconium oxychloride octahydrate, carbon fiber coated with porous carbon layer, deionized water, ammonia water, glycine and potassium chloride is (1-1.5):(2-2.5):(100-120):(1.5-2):(0.3-0.5):(0.7-0.9).

5. The processing technology of brake disc material prepared from carbon-ceramic composite material according to claim 2, characterized in that, In step A3, the mass ratio of the modified carbon fiber, ethanol, deionized water and silane coupling agent is (2.5-3):(90-100):(30-40):(1-1.2).

6. The processing technology of the brake disc material prepared from a carbon-ceramic composite material according to claim 2, characterized in that, In step A4, the mass ratio of dimethylallylsilane, vinyltriethoxysilane, double-bonded modified carbon fiber, deionized water, ethanol and benzoyl peroxide is (1-1.2):(1.1-1.3):(3-3.5):(90-100):(30-40):(0.5-0.7).

7. The processing technology of the brake disc material prepared from a carbon-ceramic composite material according to claim 1, characterized in that, In step S1, the mass ratio of phenolic resin, carbon powder, metal oxide, composite carbon fiber and pore-forming agent is (23-27):(25-30):(4-5):(4-6):(0.5-1); In step S1, the molding temperature is 170-200℃, the molding pressure is 10-15MPa, and the molding time is 25-35min; In step S1, the mixing temperature is 30-35℃ and the mixing time is 25-30 min.

8. The processing technology of the brake disc material prepared from a carbon-ceramic composite material according to claim 1, characterized in that, In step S2, the carbonization temperature is 900-1200℃ and the carbonization time is 10-30h.

9. The processing technology of the brake disc material prepared from a carbon-ceramic composite material according to claim 1, characterized in that, In step S3, the specific process of silicon infiltration is as follows: the silicon infiltration atmosphere is nitrogen, the temperature is 1420-1450℃, and the time is 3-5h; In step S3, the mass ratio of the carbonized composite material to silicon powder is (1.3-1.6):1; In step S3, the protective solution is an aluminum dihydrogen phosphate solution with a mass fraction of 30-40%; In step S3, the sintering temperature is 200-300℃ and the sintering time is 20-30min.

10. A brake disc material made of carbon-ceramic composite material prepared by a processing technology of the brake disc material prepared by any one of claims 1-9.

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