A method for preparing carbon-ceramic composite material

Abstract

The present invention relates to the technical field of composite material preparation, and discloses a method for preparing a carbon-ceramic composite material, comprising: pre-treating a first carbon-carbon composite material waste powder to obtain fine waste powder; mixing the fine waste powder with phenolic resin powder and nonionic surfactant, coke, zirconium carbide, and titanium diboride according to a first preset ratio to obtain a mixed powder; alternately arranging the mixed powder with carbon cloth and performing hot pressing and curing to obtain a resin-based composite material; carbonizing the resin-based composite material to obtain a second carbon-carbon composite material; performing liquid phase siliconizing treatment on the carbon-carbon composite material and keeping it warm for a preset time to obtain a carbon-ceramic composite material. By utilizing the first carbon-carbon composite material waste powder, through the steps of pre-treatment, mixing with phenolic resin powder, hot pressing and curing, carbonizing treatment, and liquid phase siliconizing treatment, the reuse of the carbon-carbon composite material waste powder is achieved, the utilization rate and performance of the material are improved, and finally a carbon-ceramic composite material with excellent performance is prepared.

Description

Technical Field

[0001] The invention relates to the technical field of composite material preparation, and in particular to a method for preparing a carbon-ceramic composite material. Background Art

[0002] Carbon / carbon composite materials have been widely used in the fields of single crystal silicon furnace thermal field, aircraft brakes, solid rocket engines, etc. During the preparation process of carbon / carbon composite materials, it is necessary to remove the size allowance, especially in the chemical vapor deposition process, which requires multiple machining to remove the crust and then continue the chemical vapor penetration into the interior of the workpiece until the required density is reached. A large amount of carbon / carbon composite material powder is generated during the machining process. These waste powders are usually collected by dust collectors. Since these waste powders cannot be degraded, if these carbon / carbon powders cannot be effectively reused, it will cause damage to the environment. In addition, carbon / carbon composite waste powder is mainly carbon fibers of different lengths. Carbon fibers are expensive raw materials. If the waste powder of carbon / carbon composite machining can be fully utilized, considerable benefits can be generated.

[0003] The waste powder generated by machining carbon / carbon composite materials is mainly composed of carbon fiber and chemical vapor deposition carbon or resin carbon. The powder generated by the initial machining of carbon / carbon composite products contains more long fibers. As the density of carbon / carbon composite products continues to increase, the length of the carbon fibers in the machining waste powder is shorter.

[0004] The density of aircraft carbon / carbon composite brake discs is usually greater than 1.7g / cm 3 The density of carbon / carbon composite materials used in the thermal field of single crystal silicon furnaces, such as carbon / carbon composite crucibles, guide tubes, support rings, and insulation tubes, is usually less than 1.5g / cm 3 The proportion of fine powder in carbon / carbon composite machining waste powder is lower than that of aircraft brake discs, and the proportion of long fibers is higher. It is difficult to ensure the uniformity of the product by directly mixing carbon fiber filament bundles and carbon fiber fine powder in carbon / carbon composite machining waste powder. It is difficult to avoid large pores after the mixed resin is pressed, which seriously affects the mechanical properties of the product. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a method for preparing a carbon-ceramic composite material. By utilizing the first carbon-carbon composite material waste powder, through the steps of pretreatment, mixing with phenolic resin powder, hot pressing and curing, carbonization treatment and liquid phase siliconization treatment, the waste powder of the carbon-carbon composite material is reused, the utilization rate and performance of the material are improved, and finally a carbon-ceramic composite material with excellent performance is prepared; not only the waste powder is treated in an environmentally friendly manner and the production cost is effectively reduced, but also the comprehensive performance of the material is improved.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a method for preparing a carbon-ceramic composite material, wherein a first carbon-carbon composite material waste powder is pretreated to obtain fine waste powder;

[0007] The fine waste powder is mixed with phenolic resin powder and nonionic surfactant, coke, zirconium carbide and titanium diboride according to a first preset ratio to obtain a mixed powder, wherein the fine waste powder accounts for 60% to 75%, the phenolic resin powder containing hexamethylenetetramine curing agent accounts for 25% to 40%, the nonionic surfactant accounts for 0.5% to 2%, the coke accounts for 5% to 10%, the zirconium carbide accounts for 0.5% to 2%, and the titanium diboride accounts for 0.5% to 2%;

[0008] Alternately arranging the mixed powder and the carbon cloth and performing hot pressing and curing to obtain a resin-based composite material;

[0009] Carbonizing the resin-based composite material to obtain a second carbon-carbon composite material;

[0010] The carbon-carbon composite material is subjected to liquid phase siliconization treatment and kept warm for a preset time to obtain a carbon-ceramic composite material.

[0011] Furthermore, after the carbon fine waste powder is mixed with phenolic resin powder, nonionic surfactant, coke, zirconium carbide and titanium diboride according to a preset ratio, the method further comprises:

[0012] A urotropine curing agent is added to the mixed powder, and the urotropine curing agent accounts for 6% to 10% of the mass of the phenolic resin powder.

[0013] Furthermore, after the resin-based composite material is carbonized to obtain a second carbon-carbon composite material, the method further comprises:

[0014] The second carbon-carbon composite material is subjected to chemical vapor deposition treatment or resin impregnation and carbonization treatment.

[0015] Furthermore, the temperature of the hot pressing curing is 160°C to 180°C;

[0016] The pressure value of the hot pressing curing is 10MPa~30MPa.

[0017] Furthermore, the surface of the carbon cloth is coated with a solution containing 20% ​​to 40% of a thermosetting phenolic resin;

[0018] or,

[0019] The surface of the carbon cloth is coated with a water-based coating containing 20% ​​to 40% of thermoplastic phenolic resin powder and 6% to 10% of urotropine curing agent of the phenolic resin.

[0020] Furthermore, the temperature of the carbonization treatment is 800°C-1100°C.

[0021] Furthermore, the temperature of the liquid phase siliconizing treatment is 1600°C to 1750°C.

[0022] Furthermore, the density of the second carbon-carbon composite material is 1.2 g / cm 3 ~1.45g / cm 3 .

[0023] Furthermore, in the liquid phase siliconizing treatment, the ratio of silicon material to the second carbon-carbon composite material is 1.25:1 to 1.4:1.

[0024] Furthermore, the preset duration is 1h~2h.

[0025] The above technical solution of the embodiment of the present invention has the following beneficial technical effects:

[0026] 1. By utilizing the first carbon-carbon composite waste powder, through the steps of pretreatment, mixing with phenolic resin powder, hot pressing curing, carbonization treatment and liquid phase siliconization treatment, the carbon-carbon composite waste powder is reused, the utilization rate and performance of the material are improved, and finally a carbon-ceramic composite material with excellent performance is prepared;

[0027] 2. It not only treats waste powder in an environmentally friendly way and effectively reduces production costs, but also improves the comprehensive performance of materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention provides a flow chart of a method for preparing a carbon-ceramic composite material. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0030] Please refer to Figure 1 The present invention provides a method for preparing a carbon-ceramic composite material, comprising the following steps:

[0031] Step S100, pre-treating the first carbon-carbon composite waste powder to obtain fine waste powder.

[0032] Specifically, the source of the first carbon-carbon composite waste powder is the used carbon-carbon composite materials (for example, carbon / carbon composite materials for aircraft brake discs, single crystal silicon furnace thermal fields, and polycrystalline silicon furnace thermal fields). During the chemical vapor deposition process, a large amount of carbon / carbon composite material powder is generated due to the removal of crust and processing allowance.

[0033] The above-mentioned carbon-ceramic composite material preparation method effectively recycles the first carbon-carbon composite material waste powder generated in the chemical vapor deposition process. These waste powders usually come from the use and processing of carbon / carbon composite materials such as aircraft brake discs, single crystal silicon furnace thermal fields, and polycrystalline silicon furnace thermal fields. By pre-treating these waste powders, mixing them with phenolic resin powder, and then undergoing hot pressing curing, carbonization treatment and liquid phase siliconization treatment, a carbon-ceramic composite material with excellent performance is finally made. This process not only realizes the high-value utilization of waste powder and reduces environmental pollution, but also reduces the production cost of new materials, improves the comprehensive performance of materials, and has significant economic and environmental benefits.

[0034] Before processing, in order to make full use of the carbon / carbon composite waste powder, it is first screened to remove particularly long fiber bundles and other debris. The first carbon-carbon composite waste powder is screened (sieve aperture: 1 mm -2.5 mm) and can be divided into coarse powder and fine powder. Among them, the coarse powder contains long fiber bundles that are difficult to mix evenly, while the fine powder is relatively uniform and easier to mold. The separated fine powder is used for molding.

[0035] Step S200, mixing the fine waste powder with phenolic resin powder and non-ionic surfactant, coke, zirconium carbide, and titanium diboride according to a first preset ratio to obtain a mixed powder, wherein the fine waste powder accounts for 60% to 75%, the phenolic resin powder containing hexamethylenetetramine curing agent accounts for 25% to 40%, the non-ionic surfactant accounts for 0.5% to 2%, the coke accounts for 5% to 10%, the zirconium carbide accounts for 0.5% to 2%, and the titanium diboride accounts for 0.5% to 2% to obtain a mixed powder.

[0036] Adding phenolic resin powder can provide sufficient bonding force to ensure the molding and structural stability of the composite material. By adjusting the proportion of fine waste powder, the mechanical and thermal properties of the composite material can be optimized to meet specific application requirements.

[0037] Step S300, alternately arranging the mixed powder and the carbon cloth and performing hot pressing and curing to obtain a resin-based composite material.

[0038] The hot pressing curing process can form a good interface between the mixed powder and the carbon cloth, thereby improving the mechanical properties of the composite material, such as strength and toughness; during the hot pressing curing process, the uniform distribution of heat and pressure helps control the molding process of the composite material and reduce molding defects such as wrinkles and unevenness, thereby improving the dimensional accuracy and surface quality of the product; during the curing process, the resin will evenly penetrate between the fiber layers to form a uniform distribution, which helps to improve the overall performance of the composite material. In addition, the high temperature treatment during the hot pressing curing process helps to improve the thermal stability of the composite material, enabling it to maintain performance at higher temperatures.

[0039] Before carbonization treatment, a solution containing 20%-40% phenolic resin or a suspension of phenolic resin particles needs to be applied to the surface of the carbon cloth.

[0040] As a thermosetting resin, phenolic resin can leave more carbon residues during high-temperature carbonization, thereby enhancing the interfacial bonding between carbon cloth and subsequent materials. This enhanced interfacial bonding helps improve the overall mechanical properties of the composite material, such as interlaminar shear strength; the carbon layer formed by the phenolic resin-based composite material after carbonization can improve the composite material's anti-ablation performance; the porous structure formed by the phenolic resin during the carbonization process helps improve the thermal insulation performance of the composite material, which is very beneficial for application scenarios that require thermal insulation protection.

[0041] After the fine waste powder and the phenolic resin powder are mixed, the mixed powder is obtained, and the mixed powder and the carbon cloth with surface brushing treatment are alternately laid in a mold, and a hot pressing curing treatment is performed.

[0042] Specifically, the temperature value of the hot press curing is 160° C. to 180° C.; the pressure value of the hot press curing is 10 MPa to 30 MPa.

[0043] Phenolic resin can be effectively cured within the temperature range of 160℃~180℃. The above temperature range can ensure that the chemical reaction between resin molecules proceeds smoothly to form a three-dimensional network structure, thereby improving the crosslinking density and thermal stability of the composite material.

[0044] Under a pressure of 10MPa to 30MPa, the resin can better penetrate into the pores of the reinforcing material (such as carbon cloth), while squeezing out excess air and volatiles, reducing porosity, and thus improving the bonding strength between the layers in the composite material. The pressure during hot pressing curing can ensure that the composite material maintains the desired shape and size during the curing process, reducing the need for post-molding processing and improving production efficiency.

[0045] Appropriate curing temperature and pressure can optimize the microstructure of the composite material and reduce internal defects, thereby improving the mechanical properties of the composite material, such as strength, toughness and wear resistance.

[0046] Step S400, carbonizing the resin-based composite material to obtain a second carbon-carbon composite material.

[0047] Specifically, the temperature of the carbonization treatment is 800°C-1100°C, and the density of the obtained second carbon-carbon composite material is 1.2 g / cm 3 ~1.45g / cm 3 .

[0048] Carbonization is a key step in converting resin-based composites into carbon-carbon composites, especially when carried out at high temperatures. In this process, the organic matter in the resin-based composite is decomposed, leaving a stable carbon structure. The specific carbonization temperature is 800℃-1100℃, which can ensure the complete carbonization of the resin, thereby improving the thermal stability and mechanical properties of the material.

[0049] The density of the second carbon-carbon composite material obtained is 1.2 g / cm³~1.45 g / cm³, indicating that the material has a low density and can reduce the weight of the structure while maintaining high strength and good thermal properties, which is particularly important for applications in aerospace and other fields.

[0050] Step S500, liquid phase siliconizing treatment is performed on the carbon-carbon composite material and the temperature is kept for a preset time to obtain a carbon-ceramic composite material.

[0051] In the liquid phase siliconizing treatment, the ratio of the silicon material to the second carbon-carbon composite material is 1.25:1 to 1.4:1.

[0052] Specifically, the temperature of the liquid phase siliconizing treatment is 1600°C~1750°C, and the preset duration is 1h~2h.

[0053] The above-mentioned liquid phase siliconizing treatment is a process of mixing a carbon-carbon composite material with a silicon material and treating it at high temperature to prepare a carbon-ceramic composite material. In the above process, the ratio of the silicon material to the second carbon-carbon composite material is controlled between 1.25:1 and 1.4:1, which helps to ensure that the silicon material can fully penetrate and react to form a uniform silicon carbide matrix. The temperature range of the liquid phase siliconizing treatment is set at 1600°C to 1750°C, so that the silicon material can react with the carbon material to form a silicon carbide (SiC) matrix, thereby significantly improving the material's oxidation resistance and wear resistance. The insulation time is controlled to 1 hour to 2 hours, so that the silicon material can fully penetrate into the pores of the carbon-carbon composite material and react with carbon to form silicon carbide. High temperature treatment not only promotes the formation of silicon carbide, but also helps to discharge volatile substances in the material, thereby improving the density and performance of the material.

[0054] In addition, in a specific implementation of the embodiment of the present invention, after the carbon fine waste powder is mixed with phenolic resin powder and non-ionic surfactant, coke, zirconium carbide and titanium diboride according to a preset ratio in step S200, the method for preparing the carbon-ceramic composite material further includes:

[0055] Step S210, adding hexamethylenetetramine curing agent to the mixed powder, wherein the hexamethylenetetramine curing agent accounts for 6% to 10% of the mass of the phenolic resin powder.

[0056] The function of the curing agent is to promote the curing reaction of the resin, thereby ensuring the structural stability and mechanical properties of the composite material. Optionally, the curing agent can be a urotropine curing agent. Hexamethylenetetramine is a commonly used curing agent that has the characteristics of promoting the cross-linking and curing of resins. Hexamethylenetetramine is widely used in the chemical industry and can be used as a curing agent and foaming agent for resins and plastics. When used as a curing agent, urotropine can react with the functional groups in the resin to form a three-dimensional network structure, thereby enhancing the hardness and strength of the composite material.

[0057] Adding the right amount of curing agent can ensure that the composite material forms a uniform and stable structure during the subsequent hot pressing curing process. The amount of curing agent added needs to be precisely controlled to ensure that the performance of the composite material meets the design requirements. Too much curing agent may make the material too brittle, while insufficient curing agent may cause the material to be incompletely cured, affecting its final performance.

[0058] Furthermore, after the resin-based composite material is carbonized in step S400 to obtain the second carbon-carbon composite material, the method for preparing the carbon-ceramic composite material further includes:

[0059] Step S410 , performing chemical vapor deposition treatment or resin impregnation and carbonization treatment on the second carbon-carbon composite material.

[0060] Chemical vapor deposition (CVD) or chemical vapor infiltration (CVI) treatments can further improve the density and mechanical properties of carbon-carbon composites through the cracking of hydrocarbon gases.

[0061] The resin impregnation method is to impregnate the carbon fiber preform into a resin containing a carbon source, and then carbonize the resin through heat treatment to further improve the density and mechanical properties of the composite material, while reducing the porosity and improving the thermal conductivity and electrical conductivity of the material. During the resin impregnation and carbonization process, the porosity of the carbon-carbon composite material will decrease, while the pore size within a certain range will increase, and closed pores will be formed.

[0062] The carbon / carbon composite material product prepared by mixing phenolic resin with carbon / carbon powder, hot pressing, curing and carbonization can be used for high-temperature resistant tooling pads in vacuum or protective atmosphere, or can be further prepared by liquid phase siliconization treatment to prepare C / SiC composite materials for high-temperature resistant and wear-resistant nozzles, tooling pads, brake pads, etc.

[0063] Below, the above preparation method is described in detail with several embodiments:

[0064] Embodiment 1

[0065] Step 1: 70 g of waste powder generated by machining of carbon / carbon composite materials is sieved through a sieve with an aperture of 2.5 mm to obtain fine powder, which is then fully stirred and mixed with 30 g of phenolic resin powder, 3 g of hexamethylenetetramine, 1 ml of nonionic surfactant OP-10, 5 g of 100-mesh pitch coke, 1 g of zirconium carbide with a particle size of 2 μm, and 2 g of titanium diboride with a particle size of 1 μm; thermosetting liquid phenolic resin is evenly mixed with alcohol in a volume ratio of 1:1, applied on the surface of the carbon cloth, and then alternately laid in the mold with the mixed powder.

[0066] Step 2: Hot pressing and curing at 160℃ and a pressure of 20MPa.

[0067] Step 3: C / C composite material can be prepared by carbonization at 900°C.

[0068] Step 4: The carbon ceramic composite material can be prepared by liquid phase siliconizing treatment, the weight ratio of silicon material to C / C composite material product is 1.4:1, siliconizing is carried out at 1650° C. and keeping the temperature for 2 hours.

[0069] Embodiment 2

[0070] Step 1: 60 g of waste powder generated by machining of carbon / carbon composite materials is sieved through a sieve with an aperture of 2.5 mm to obtain fine powder, which is then fully stirred and mixed with 30 g of phenolic resin powder, 3 g of hexamethylenetetramine, 1 ml of nonionic surfactant OP-4, 10 g of 100-mesh pitch coke, 1.5 g of zirconium carbide with a particle size of 2 μm, and 1.5 g of titanium diboride with a particle size of 1 μm; 3 g of phenolic resin powder (0.3 g of hexamethylenetetramine) is added to 10 ml of water and stirred into a slurry, which is then applied on a carbon cloth, and the carbon cloth and the mixed powder are alternately laid into a mold.

[0071] Step 2: hot pressing and curing at 165°C with a pressure of 15MPa.

[0072] Step 3: Carbon / carbon composite materials with good toughness and high strength can be prepared through carbonization at 900°C.

[0073] Step 4: The carbon ceramic composite material can be prepared by liquid phase siliconizing process, the weight ratio of silicon material to C / C composite material product is 1.3:1, siliconizing at 1700°C and keeping warm for 1 hour.

[0074] Embodiment 3

[0075] Step 1: 65 g of waste powder generated by machining of carbon / carbon composite materials is screened out through a sieve with an aperture of 2.5 mm to obtain fine powder, which is then thoroughly stirred and mixed with 35 g of phenolic resin powder, 3.5 g of urotropine, 1 ml of nonionic surfactant Span-80, 10 g of 100-mesh pitch coke, 2 g of zirconium carbide with a particle size of 2 μm, and 0.5 g of titanium diboride with a particle size of 1 μm; 3 g of phenolic resin powder (0.3 g of urotropine) is added to 10 ml of water and stirred into a slurry, which is then brushed on the surface of the carbon cloth and then alternately laid in the mold with the mixed powder.

[0076] Step 2: hot pressing at 170°C and a pressure of 10 MPa.

[0077] Step 3: C / C composite material can be prepared by carbonization at 1000°C.

[0078] Step 4: The carbon ceramic composite material can be prepared by liquid phase siliconizing process, the weight ratio of silicon material to C / C composite material product is 1.25:1, siliconizing at 1650°C, and keeping warm for 1.5 hours.

[0079] The embodiment of the present invention aims to protect a method for preparing a carbon-ceramic composite material, comprising the following steps: pre-treating a first carbon-carbon composite material waste powder to obtain fine waste powder; mixing the fine waste powder with phenolic resin powder and non-ionic surfactant, coke, zirconium carbide, and titanium diboride according to a first preset ratio to obtain a mixed powder, wherein the fine waste powder accounts for 60% to 75%, the phenolic resin powder containing urotropine curing agent accounts for 25%-40%, the non-ionic surfactant accounts for 0.5%-2%, the coke accounts for 5%-10%, the zirconium carbide accounts for 0.5%-2%, and the titanium diboride accounts for 0.5%-2%; the mixed powder and carbon cloth are alternately arranged and hot-pressed to obtain a resin-based composite material; the resin-based composite material is carbonized to obtain a second carbon-carbon composite material; the carbon-carbon composite material is subjected to liquid phase siliconization treatment and kept warm for a preset time to obtain a carbon-ceramic composite material. The above technical scheme has the following effects:

[0080] 1. By utilizing the first carbon-carbon composite waste powder, through the steps of pretreatment, mixing with phenolic resin powder, hot pressing curing, carbonization treatment and liquid phase siliconization treatment, the carbon-carbon composite waste powder is reused, the utilization rate and performance of the material are improved, and finally a carbon-ceramic composite material with excellent performance is prepared;

[0081] 2. It not only treats waste powder in an environmentally friendly way and effectively reduces production costs, but also improves the comprehensive performance of materials.

[0082] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A method for preparing a carbon-ceramic composite material, characterized in that: The steps include: After pre-treating the first carbon-carbon composite waste powder, fine waste powder is obtained; The fine waste powder is mixed with phenolic resin powder and nonionic surfactant, coke, zirconium carbide and titanium diboride according to a first preset ratio to obtain a mixed powder, wherein the fine waste powder accounts for 60% to 75%, the phenolic resin powder containing hexamethylenetetramine curing agent accounts for 25% to 40%, the nonionic surfactant accounts for 0.5% to 2%, the coke accounts for 5% to 10%, the zirconium carbide accounts for 0.5% to 2%, and the titanium diboride accounts for 0.5% to 2%, and the sum of the various components in the mixed powder is 100%; Alternately arranging the mixed powder and the carbon cloth and performing hot pressing and curing to obtain a resin-based composite material; Carbonizing the resin-based composite material to obtain a second carbon-carbon composite material; Performing liquid phase siliconization treatment on the carbon-carbon composite material and keeping it warm for a preset time to obtain a carbon-ceramic composite material; After the fine waste powder is mixed with phenolic resin powder, nonionic surfactant, coke, zirconium carbide and titanium diboride according to the first preset ratio, the method further comprises: Adding urotropine curing agent to the mixed powder, the urotropine curing agent accounts for 6% to 10% of the mass of the phenolic resin powder; The surface of the carbon cloth is coated with a solution containing 20% ​​to 40% of a thermosetting phenolic resin; or, The surface of the carbon cloth is coated with a water-based coating containing 20% ​​to 40% of thermoplastic phenolic resin powder and 6% to 10% of urotropine curing agent of the phenolic resin.

2. The method for preparing the carbon-ceramic composite material according to claim 1, characterized in that: After the resin-based composite material is carbonized to obtain a second carbon-carbon composite material, the method further comprises: The second carbon-carbon composite material is subjected to chemical vapor deposition treatment or resin impregnation and carbonization treatment.

3. The method for preparing a carbon-ceramic composite material according to claim 1 or 2, characterized in that: The temperature of the hot pressing curing is 160°C to 180°C; The pressure value of the hot pressing curing is 10MPa~30MPa.

4. The method for preparing a carbon-ceramic composite material according to any one of claims 1 or 2, characterized in that: The temperature of the carbonization treatment is 800°C-1100°C.

5. The method for preparing a carbon-ceramic composite material according to claim 1 or 2, characterized in that: The temperature value of the liquid phase siliconizing treatment is 1600°C~1750°C.

6. The method for preparing a carbon-ceramic composite material according to claim 1 or 2, characterized in that: The density of the second carbon-carbon composite material is 1.2 g / cm 3 ~1.45g / cm 3 .

7. The method for preparing a carbon-ceramic composite material according to claim 1 or 2, characterized in that: In the liquid phase siliconizing treatment, the ratio of the silicon material to the second carbon-carbon composite material is 1.25:1 to 1.4:

1.

8. The method for preparing a carbon-ceramic composite material according to any one of claims 1 or 2, characterized in that: The preset duration is 1h~2h.

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