Brake disc, preparation method thereof and vehicle

Abstract

The invention relates to the field of brake discs, and particularly discloses a brake disc and a preparation method thereof and a vehicle. The brake disc comprises a base body, a brake pad and a brake pad, and the base body is provided with pores; the anti-oxidation material is loaded on the base body, and at least part of the anti-oxidation material is contained in the pores; the antioxidant material comprises silicon dioxide. The brake disc has excellent oxidation resistance, and the service life of the brake disc can be effectively prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of brake discs, and particularly relates to a brake disc, a preparation method thereof and a vehicle. BACKGROUND

[0002] In the braking field, carbon ceramic brake discs are favored due to their excellent braking performance and heat resistance. However, in actual use, defects such as cracks and pores may occur in the brake disc, which not only reduces the overall performance of the brake disc, but also greatly shortens the service life of the brake disc. Therefore, the related technology of the brake disc needs to be further improved. SUMMARY

[0003] The application is made based on the discovery and understanding of the inventors on the following facts and problems:

[0004] Carbon ceramic brake discs have the advantages of low density, high temperature resistance, high and stable friction performance, and have been widely used in high-energy braking fields such as automobiles, high-speed trains and airplanes. However, in actual use, defects such as cracks and pores may occur in the brake disc, which not only reduces the overall performance of the brake disc, but also greatly shortens the service life of the brake disc. The inventors have found that the reason for the above defects of the brake disc is that although the brake disc looks dense, there are still a certain number and size of pores in the brake disc. In a high-temperature use environment, air enters the inside of the brake disc and is oxidized, thereby causing defects in the inside of the brake disc and affecting the service life of the brake disc.

[0005] The application aims to at least solve one of the technical problems in the related art. To this end, the application provides a brake disc with better oxidation resistance, a preparation method thereof and a vehicle.

[0006] The first aspect of the application provides a brake disc, comprising: a base body having pores; an oxidation-resistant material loaded on the base body, and at least part of the oxidation-resistant material being contained in the pores; and the oxidation-resistant material comprising silicon dioxide. Silicon dioxide has self-healing properties, which can repair micro-pores and micro-cracks in the inside of the brake disc, effectively preventing the erosion of oxygen molecules, so that the brake disc has good oxidation resistance and a longer service life.

[0007] In some embodiments, the oxidation-resistant material further comprises at least one of zirconium oxide and zirconium silicate. Zirconium oxide itself has excellent oxidation resistance, and can also coordinate the thermal expansion coefficients between the base body and the silicon dioxide; zirconium silicate has the advantages of high temperature stability, thermal shock resistance, low thermal expansion coefficient and low oxygen diffusion coefficient, and can also inhibit glass crystallization in the silicon dioxide glass phase and hinder crack propagation, thereby improving the oxidation resistance of the brake disc.

[0008] In some embodiments, the anti-oxidation material comprises the silica, the zirconia and the zirconium silicate in a mass ratio of 1:0.5-4.0:0.3-3.0. Within the above ratio range, the three components synergistically work better, and the anti-oxidation performance of the brake disc is further improved.

[0009] In some embodiments, the matrix comprises at least one of a carbon fiber reinforced carbon matrix composite, a carbon fiber reinforced carbon and a silicon carbide dual matrix composite.

[0010] In some embodiments, the matrix is a carbon fiber reinforced carbon and a silicon carbide dual matrix composite, and the brake disc comprises: carbon 30wt%-40wt%; silicon carbide 5wt%-15wt%; silicon 35wt%-55wt%; silicon oxide 1wt%-5wt%; zirconia 3wt%-8wt%; and zirconium silicate 5wt%-10wt%.

[0011] In some embodiments, the brake disc has a porosity of 1%-10%; and / or the brake disc has a density of 2.0g / cm 3 -2.5g / cm 3 ; and / or the matrix has a density of 1.9g / cm 3 -2.2g / cm 3 ; and / or the matrix has a porosity of 2%-15%.

[0012] In some embodiments, the brake disc has an oxidation loss rate less than or equal to 14%.

[0013] In a second aspect of the present application, a method for preparing a brake disc is provided, comprising: (1) preparing a precursor solution comprising a silicon source; (2) placing a matrix into the precursor solution to obtain an impregnated matrix; (3) sequentially subjecting the impregnated matrix to a first drying and a heat treatment to obtain the brake disc. Thus, a brake disc with good anti-oxidation performance and long service life can be prepared, and the preparation method is simple, convenient and easy to realize industrial production.

[0014] In some embodiments, the precursor solution comprises the silicon source and a zirconium source.

[0015] In some embodiments, in the precursor solution, the molar ratio of silicon in the silicon source to zirconium in the zirconium source is 1-2:1. Thus, the reaction can be more complete, without causing raw material waste, and the obtained product is conducive to improving the anti-oxidation of the brake disc.

[0016] In some embodiments, the silicon source comprises at least one of tetramethyl orthosilicate, tetraethyl orthosilicate, tetraisopropyl orthosilicate, tetrabutyl orthosilicate, methyltrimethoxysilane, diethyldiethoxysilane, tetraphenyl silicate, silicon tetrachloride, silicate; and / or the zirconium source comprises one or more of zirconium oxychloride, zirconium tetrachloride, zirconium n-propoxide, zirconium isopropoxide.

[0017] In some embodiments, step (1) comprises: mixing the silicon source with ethanol and water, adjusting the pH value of the solution to 1-3, and standing for 1-2 hours to obtain a hydrolysis solution; mixing the hydrolysis solution with a zirconium source aqueous solution of 0.5-2 mol / L, and stirring at room temperature for 3-5 hours to obtain the precursor solution. In this way, the first step reaction can be promoted, and the reaction efficiency can be improved.

[0018] In some embodiments, the mass ratio of the silicon source, ethanol and water is (2-5):(2-8):1. In this way, the reaction can be more complete, the raw materials will not be wasted, and the obtained product is beneficial to improve the oxidation resistance of the brake disc.

[0019] In some embodiments, the pH value of the solution is adjusted by a pH adjuster, and the pH adjuster comprises at least one of hydrochloric acid, phosphoric acid and citric acid.

[0020] In some embodiments, before step (1), the method further comprises: sequentially polishing, cleaning and second drying the substrate. In this way, a clean and dry substrate can be obtained, and the subsequent steps can be facilitated.

[0021] In some embodiments, step (2) comprises sequentially: vacuum impregnation at room temperature for 2-3 hours; and pressure impregnation at 50-60℃ and 0.3-0.6 MPa for 1-2 hours. In this way, the precursor solution can enter the pores of the substrate, so as to effectively improve the oxidation resistance of the brake disc.

[0022] In some embodiments, in step (3): the first drying comprises drying treatment at 90-100℃ for 8-12 hours; and / or the heat treatment comprises heat preservation at 1000-1200℃ under a protective atmosphere for 2-4 hours. In this way, the precursors in the composite material can be converted into silicon dioxide, zirconium dioxide and zirconium silicate, so as to improve the oxidation resistance of the brake disc.

[0023] The third aspect of the present application proposes a vehicle comprising the brake disc of the first aspect. In this way, the vehicle has good braking performance, and the service life of the brake disc is long, and the damage repair rate is low. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is an optical microscope photo of the cross section of the final product in Embodiment 2. Detailed Implementation

[0025] The embodiments of this application are described in detail below, with examples of these embodiments illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0026] In a first aspect of this application, a brake disc is provided, comprising: a substrate having pores; an antioxidant material loaded on the substrate, and at least a portion of the antioxidant material being contained within the pores; the antioxidant material comprising silica. Silica is in a glassy state and can soften and become fluid at high temperatures, thereby effectively preventing oxygen erosion by repairing micropores and microcracks inside the brake disc, exhibiting self-healing properties. By placing the aforementioned antioxidant material within the pores of the substrate, the oxidation resistance of the brake disc can be effectively improved, mitigating defects such as cracks and holes caused by internal oxidation, thereby significantly extending the service life of the brake disc.

[0027] It is understood that there are no particular limitations on the specific form in which the antioxidant materials exist in the matrix pores, including but not limited to: the antioxidant materials filling the matrix pores, specifically filling a portion of the pore space or completely filling the pores; the antioxidant materials can also adhere to the inner wall of the matrix pores, such as forming a thin film on the inner wall of the matrix pores.

[0028] In some embodiments, the antioxidant material further includes at least one of zirconium oxide and zirconium silicate; that is, the antioxidant material may include silica and zirconium oxide; it may include silica and zirconium silicate; or it may include silica, zirconium oxide, and zirconium silicate. Specifically, zirconium oxide itself has excellent antioxidant properties and can coordinate the coefficients of thermal expansion between the matrix and silica, improving the problem of easy detachment of silica under working conditions due to the large difference in the coefficients of thermal expansion between the two. Zirconium silicate has advantages such as high-temperature stability, thermal shock resistance, low coefficient of thermal expansion, and low oxygen diffusion coefficient, and can inhibit glass crystallization and hinder crack propagation within the silica glass phase. Therefore, the synergistic effect of silica, zirconium oxide, and zirconium silicate can effectively improve the antioxidant properties of the brake disc and extend its service life.

[0029] In some embodiments, the anti-oxidation material includes the silica, zirconium oxide and zirconium silicate in a mass ratio of 1:0.5-4.0:0.3-3.0. As an example, the anti-oxidation material can include the silica, zirconium oxide and zirconium silicate in a mass ratio of 1:0.5:0.3, 1:1.0:0.3, 1:2.0:0.3, 1:3.0:0.3, 1:4.0:0.3, 1:0.5:0.8, 1:0.5:1.0, 1:0.5:2.0, 1:0.5:3.0, etc. Within the above ratio range, the three components work together better, and the anti-oxidation performance of the brake disc is further improved.

[0030] In some embodiments, the specific type of the matrix is not particularly limited as long as it can be applicable to the brake disc. In some embodiments, the matrix can include at least one of a carbon fiber reinforced carbon matrix composite, a carbon fiber reinforced carbon and a silicon carbide double matrix composite. In this way, the brake disc has the advantages of high specific strength, specific rigidity, low density, high temperature resistance, high and stable friction performance, etc.

[0031] In some embodiments, when the matrix is the carbon fiber reinforced carbon and the silicon carbide double matrix composite, the brake disc includes, based on the total mass of the brake disc: carbon 30wt%-40wt%; silicon carbide 5wt%-15wt%; silicon 35wt%-55wt%; silicon oxide 1wt%-5wt%; zirconium oxide 3wt%-8wt%; and zirconium silicate 5wt%-10wt%.

[0032] In some embodiments, the content of the carbon in the brake disc can be 30wt%, 31wt%, 32wt%, 33wt%, 34wt%, 35wt%, 36wt%, 37wt%, 38wt%, 39wt%, 40wt%, etc.

[0033] In some embodiments, the content of the silicon carbide in the brake disc can be 5wt%, 6wt%, 7wt%, 8wt%, 9wt%, 10wt%, 11wt%, 12wt%, 13wt%, 14wt%, 15wt%, etc.

[0034] In some embodiments, the content of the silicon in the brake disc can be 35wt%, 38wt%, 40wt%, 42wt%, 45wt%, 48wt%, 50wt%, 52wt%, 55wt%, etc.

[0035] In some embodiments, the content of the silicon oxide in the brake disc can be 1wt%, 1.5wt%, 2wt%, 2.5wt%, 3wt%, 3.5wt%, 4wt%, 4.5wt%, 5wt%, etc.

[0036] In some embodiments, the content of zirconium oxide in the brake disc can be 3wt%, 4wt%, 5wt%, 6wt%, 7wt%, 8wt%, etc.

[0037] In some embodiments, the content of zirconium silicate in the brake disc can be 5wt%, 6wt%, 7wt%, 8wt%, 9wt%, 10wt%, etc.

[0038] With the above ingredients, the comprehensive performance of the brake disc is further improved, and the service life is longer.

[0039] In some embodiments, the porosity of the brake disc is 1% to 10%, specifically, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, etc.

[0040] In some embodiments, the density of the brake disc is 2.0g / cm 3 ~ 2.5g / cm 3 , specifically, 2g / cm 3 , 2.05g / cm 3 , 2.1g / cm 3 , 2.15g / cm 3 , 2.2g / cm 3 , 2.25g / cm 3 , 2.3g / cm 3 , 2.35g / cm 3 , 2.4g / cm 3 , 2.45g / cm 3 , 2.5g / cm 3 , etc.

[0041] In some embodiments, the porosity of the substrate is 2% to 15%. Specifically, the porosity of the substrate can be 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 4%, 15%, etc.

[0042] In some embodiments, the density of the substrate is 1.9g / cm 3 ~ 2.2g / cm 3 , specifically, 1.9g / cm 3 , 1.95g / cm 3 , 2g / cm 3 , 2.05g / cm 3 , 2.1g / cm 3 , 2.15g / cm 3 , 2.2g / cm 3 , etc.

[0043] This demonstrates that the antioxidant material truly penetrates the pores of the matrix, effectively improving the anti-oxidation performance of the brake disc and extending its service life.

[0044] In some embodiments, the oxidation weight loss rate of the brake disc is less than or equal to 14%. Specifically, the oxidation weight loss rate of the brake disc can be 0%, 1%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, etc. With the above-mentioned oxidation weight loss rates, the brake disc exhibits better oxidation resistance and a longer service life.

[0045] In this paper, the oxidation weight loss rate is calculated as (mass before oxidation - mass after oxidation) / mass before oxidation × 100%, and can be detected by the following method: The sample is oxidized at a set temperature for a certain time, and the mass of the sample before and after oxidation is measured to determine the oxidation weight loss rate. A lower oxidation weight loss rate indicates better oxidation resistance of the brake disc.

[0046] In a second aspect of this application, a method for manufacturing a brake disc is provided. According to an embodiment of this application, the method for manufacturing a brake disc may include:

[0047] (1) Prepare a precursor solution including a silicon source.

[0048] In some embodiments, prior to step (1), the process further includes: sequentially grinding and polishing the substrate, cleaning it, and then drying it. This results in a smooth and clean substrate, which facilitates the subsequent loading of antioxidants onto the substrate.

[0049] Specifically, the above-mentioned polishing can be done with sandpaper, such as 500-grit sandpaper. Cleaning can be done using ultrasonic cleaning, specifically with anhydrous ethanol, for 20-30 minutes (e.g., 20, 22, 25, 28, 30 minutes, etc.). After ultrasonic cleaning, the substrate can be dried in an oven at 80℃-100℃ (e.g., 80℃, 85℃, 90℃, 95℃, 100℃, etc.) for 24-30 hours (e.g., 24h, 25h, 26h, 27h, 28h, 29h, 30h, etc.).

[0050] In some embodiments, the precursor solution includes the silicon source and the zirconium source. Thus, an antioxidant material containing silicon dioxide, zirconium oxide, and zirconium silicate can be obtained.

[0051] It is understood that there are no particular limitations on the specific method for preparing the precursor solution including silicon and zirconium sources, as long as the target product can be obtained. In some embodiments, step (1) may include: mixing the silicon source with ethanol and water (including but not limited to deionized water), adjusting the pH of the solution to 1-3, and letting it stand for 1-2 hours to obtain a hydrolysate; mixing the hydrolysate with a 0.5 mol / L-2 mol / L aqueous solution of zirconium source, and stirring at room temperature for 3-5 hours to obtain the precursor solution.

[0052] As an example, in step (1), the pH of the solution can be 1, 1.5, 2, 2.5 or 3, etc.; the standing time can be 1h, 1.2h, 1.5h, 1.8h or 2h, etc.; the concentration of the zirconium source aqueous solution can be 0.5mol / L, 1mol / L, 1.5mol / L or 2mol / L, etc.; and the stirring time at room temperature can be 3h, 3.5h, 4h, 4.5h or 5h, etc.

[0053] In some embodiments, the pH value of the solution is adjusted using a pH adjuster, which includes at least one of hydrochloric acid, phosphoric acid, and citric acid. This allows for convenient and rapid pH adjustment, facilitating the reaction.

[0054] In this step, the silicon source undergoes hydrolysis, condensing to form long-chain Si-O-Si bonds, which then further polymerize to generate a three-dimensional cross-linked network structure; while the zirconium source hydrolyzes with water to generate zirconium oxide.

[0055] In some embodiments, the mass ratio of the silicon source to ethanol and water is 2–5:2–8:1; specifically, 2:2:1, 3:2:1, 4:2:1, 5:2:1, 2:4:1, 2:6:1, 2:8:1, etc. This material ratio facilitates a complete reaction, avoids waste of raw materials, and results in an antioxidant material with superior antioxidant properties. If the silicon source ratio is too low, it may lead to a low degree of hydrolysis, resulting in less silica production and insufficient antioxidant performance; conversely, if the silicon source ratio is too high, it may lead to excessive hydrolysis, unstable hydrolysate, and a tendency to gel.

[0056] In some embodiments, the molar ratio of silicon in the silicon source to zirconium in the zirconium source in the precursor solution is 1 to 2:1; specifically, 1:2, 1.2:1, 1.5:1, 1.8:1, 2:1, etc. Such ratios are beneficial for obtaining antioxidant materials with better antioxidant properties.

[0057] In some embodiments, the silicon source includes at least one selected from methyl orthosilicate, ethyl orthosilicate, isopropyl orthosilicate, butyl orthosilicate, methyltrimethoxysilane, diethyldiethoxysilane, tetraphenyl silicate, silicon tetrachloride, and silicates; the zirconium source includes one or more selected from zirconium oxychloride, zirconium tetrachloride, zirconium n-propoxide, and zirconium isopropoxide; and the acid includes hydrochloric acid. Therefore, the materials are widely available, the cost is low, and the obtained antioxidant material exhibits excellent antioxidant properties.

[0058] (2) The matrix is ​​placed in the precursor solution to obtain the impregnated matrix.

[0059] In this step, the precursor solution can enter the pores of the matrix, thereby obtaining a brake disc with better antioxidant properties in subsequent steps.

[0060] In some embodiments, placing the matrix in the precursor solution may include the following sequential processes: vacuum impregnation at room temperature for 2-3 hours; and pressure impregnation at 50-60°C and 0.3-0.6 MPa for 1-2 hours. Specifically, the vacuum impregnation time can be 2 hours, 2.2 hours, 2.5 hours, 2.8 hours, 3 hours, etc.; the pressure impregnation temperature can be 50°C, 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C, 60°C, etc.; the pressure impregnation pressure can be 0.3 MPa, 0.35 MPa, 0.4 MPa, 0.45 MPa, 0.5 MPa, 0.55 MPa, 0.6 MPa, etc.; and the pressure impregnation time can be 1 hour, 1.2 hours, 1.5 hours, 1.8 hours, 2 hours, etc. This promotes the precursor solution to fully penetrate the pores of the matrix, thereby effectively improving the oxidation resistance of the brake disc.

[0061] (3) The impregnated substrate is subjected to a first drying and heat treatment in sequence to obtain the brake disc.

[0062] In some embodiments, in step (3): the first drying includes drying at 90℃ to 100℃ for 8 to 12 hours. Specifically, the temperature of the first drying can be 90℃, 91℃, 92℃, 93℃, 94℃, 95℃, 96℃, 97℃, 98℃, 99℃, 100℃, etc., and the drying time can be 8 hours, 8.5 hours, 9 hours, 9.5 hours, 10 hours, 10.5 hours, 11 hours, 11.5 hours, 12 hours, etc. In this step, the solvent in the precursor solution can be removed, which is beneficial for subsequent heat treatment steps.

[0063] In some embodiments, step (3) involves heat treatment at 1000°C to 1200°C for 2 to 4 hours under a protective atmosphere. After heat treatment, the silicon source and zirconium source in the precursor solution react to generate an antioxidant material, which can effectively improve the antioxidant performance of the brake disc and extend its service life.

[0064] It is understandable that during the heat treatment process, the silicon source and zirconium source may be converted into antioxidant materials through the following reaction:

[0065] Si(OC2H5)4+2H2O→SiO2+4C2H5OH

[0066] ZrCl4 + 2H2O → ZrO2 + 4HCl

[0067] ZrO2 + SiO2 → ZrSiO4

[0068] In a third aspect of this application, a vehicle is provided, comprising the aforementioned brake disc, or a brake disc manufactured using the aforementioned method. Using the aforementioned brake disc, the vehicle can have superior braking performance, and the brake disc has a long service life and a low failure / repair rate.

[0069] It is understood that there are no particular restrictions on the specific types of vehicles mentioned above; any vehicle that requires disc brakes is acceptable. For example, the vehicles mentioned above can be automobiles (such as cars, RVs, trucks, transport vehicles, buses, etc.), trains (such as regular trains, high-speed trains, etc.), and airplanes.

[0070] It is understood that, in addition to the brake discs mentioned above, the vehicle has the necessary structures and components in conventional technology. Taking a car as an example, it may include the chassis, body, tires, engine, central control, seats, interior trim, and other necessary structures and components of a conventional car, which will not be described in detail in this application.

[0071] The embodiments of this application are described in detail below.

[0072] Example 1

[0073] 1. The C / C-SiC composite matrix (i.e., carbon fiber reinforced carbon and silicon carbide dual matrix composite) was cut into 50mm×50mm×10mm pieces as required. The matrix surface was polished with 500-grit sandpaper, then ultrasonically cleaned with anhydrous ethanol for 30 minutes, and finally dried in an 80℃ oven for 24 hours. The density of the C / C-SiC composite matrix was 2.1 g / cm³. 3 The porosity is 8%.

[0074] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 2:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2. After standing for 2 hours, the hydrolysate is obtained.

[0075] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0076] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0077] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0078] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition includes: 35wt% carbon, 13wt% silicon, 40wt% silicon carbide, 3wt% silicon oxide, 2wt% zirconium oxide, and 7wt% zirconium silicate; with a density of 2.45 g / cm³. 3 The porosity is 2.5%.

[0079] 7. The final product obtained was oxidized at 1250℃ for 300 h, and its oxidation weight loss rate was 8.1 wt%.

[0080] Example 2

[0081] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 20 minutes. Finally, dry it in a 100℃ oven for 30 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3 The porosity is 8%.

[0082] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2. After standing for 2 hours, the hydrolysate is obtained.

[0083] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0084] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 3 hours.

[0085] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0086] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition includes: 35wt% carbon, 13wt% silicon, 40wt% silicon carbide, 4wt% silicon oxide, 3wt% zirconium oxide, and 5wt% zirconium silicate; with a density of 2.44 g / cm³. 3 The porosity is 2.5%. An optical microscope image of the cross-section of the final product is shown below. Figure 1 (The scale bar in the figure is 250 micrometers), from Figure 1 As can be seen, the white part is the antioxidant material that fills the pores of the matrix.

[0087] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 6.4 wt%.

[0088] Example 3

[0089] 1. The C / C-SiC composite matrix was cut into 50mm×50mm×10mm pieces as required. The matrix surface was polished with 500-grit sandpaper, then ultrasonically cleaned with anhydrous ethanol for 25 minutes, and finally dried in a 90℃ oven for 28 hours. The density of the C / C-SiC composite material was 2.1 g / cm³. 3 The porosity is 8%.

[0090] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 4:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2. After standing for 2 hours, the hydrolysate is obtained.

[0091] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0092] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0093] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0094] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 35wt% carbon, 13wt% silicon, 40wt% silicon carbide, 2wt% silicon oxide, 6wt% zirconium oxide, and 4wt% zirconium silicate; the density was 2.48 g / cm³. 3 The porosity is 2.2%.

[0095] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 11.5 wt%.

[0096] Example 4

[0097] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3 The porosity is 8%.

[0098] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:2:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0099] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0100] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0101] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0102] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 35wt% carbon, 13wt% silicon, 39wt% silicon carbide, 2wt% silicon oxide, 8wt% zirconium oxide, and 3wt% zirconium silicate; the density was 2.49 g / cm³. 3 The porosity is 2.0%.

[0103] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 13.2 wt%.

[0104] Example 5

[0105] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3 The porosity is 8%.

[0106] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:8:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0107] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0108] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0109] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0110] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 35wt% carbon, 13wt% silicon, 39wt% silicon carbide, 2wt% silicon oxide, 7wt% zirconium oxide, and 4wt% zirconium silicate, with a density of 2.48 g / cm³. 3 The porosity is 2.2%.

[0111] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 13.0 wt%.

[0112] Example 6

[0113] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3The porosity is 8%.

[0114] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0115] 3. Add 0.5 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0116] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0117] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0118] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 36wt% carbon, 14wt% silicon, 40wt% silicon carbide, 4wt% silicon oxide, 3wt% zirconium oxide, and 3wt% zirconium silicate, with a density of 2.41 g / cm³. 3 The porosity is 3.5%.

[0119] 7. The final product was oxidized at 1250℃ for 300 h, and its oxidation weight loss rate was 6.7 wt%.

[0120] Example 7

[0121] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3 The porosity is 8%.

[0122] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0123] 3. Add 2 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 h to obtain the precursor solution;

[0124] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0125] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0126] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 36wt% carbon, 13wt% silicon, 40wt% silicon carbide, 3wt% silicon oxide, 4wt% zirconium oxide, and 4wt% zirconium silicate, with a density of 2.44 g / cm³. 3 The porosity is 3.0%.

[0127] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 7.5 wt%.

[0128] Example 8

[0129] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3 The porosity is 8%.

[0130] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0131] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0132] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0133] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0134] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 35wt% carbon, 13wt% silicon, 40wt% silicon carbide, 2wt% silicon oxide, 4wt% zirconium oxide, and 6wt% zirconium silicate, with a density of 2.47 g / cm³. 3 The porosity is 2.5%.

[0135] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 10.8 wt%.

[0136] Example 9

[0137] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3 The porosity is 8%.

[0138] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0139] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 2:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0140] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0141] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0142] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 36wt% carbon, 13wt% silicon, 40wt% silicon carbide, 6wt% silicon oxide, 3wt% zirconium oxide, and 3wt% zirconium silicate, with a density of 2.41 g / cm³. 3 The porosity is 3.5%.

[0143] 7. The final product was oxidized at 1250℃ for 300 h, and its oxidation weight loss rate was 9.1 wt%.

[0144] Example 10

[0145] 1. The C / C-SiC composite matrix was cut into 50mm×50mm×10mm pieces as required. The matrix surface was polished with 500-grit sandpaper, then ultrasonically cleaned with anhydrous ethanol for 30 minutes, and finally dried in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material was 2.2 g / cm³. 3 The porosity is 5%.

[0146] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0147] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0148] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0149] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0150] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 37wt% carbon, 14wt% silicon, 42wt% silicon carbide, 3wt% silicon oxide, 2wt% zirconium oxide, and 2wt% zirconium silicate, with a density of 2.39 g / cm³. 3 The porosity is 1.8%.

[0151] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 6.0 wt%.

[0152] Example 11

[0153] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.0 g / cm³. 3The porosity is 10%.

[0154] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0155] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0156] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0157] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0158] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 34wt% carbon, 13wt% silicon, 39wt% silicon carbide, 4wt% silicon oxide, 4wt% zirconium oxide, and 6wt% zirconium silicate, with a density of 2.47 g / cm³. 3 The porosity is 4.5%.

[0159] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 8.9 wt%.

[0160] Example 12

[0161] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.3 g / cm³. 3 The porosity is 2%;

[0162] 2. Mix tetraethyl orthosilicate with ethanol and deionized water until homogeneous, wherein the mass ratio of tetraethyl orthosilicate:ethanol:deionized water is 3:5:1. Add an appropriate amount of 1mol / L dilute hydrochloric acid solution to adjust the pH of the solution to 2, and let it stand for 2 hours to obtain the hydrolysate.

[0163] 3. Add 1 mol / L zirconium tetrachloride aqueous solution to the hydrolysate from step 2, control the silicon / zirconium molar ratio to be 1.5:1, and stir at room temperature for 2 hours to obtain the precursor solution;

[0164] 4. Immerse the C / C-SiC composite material from step 1 in the precursor solution, vacuum impregnate at room temperature for 3 hours, and then impregnate under pressure at 50°C and 0.5 MPa for 2 hours;

[0165] 5. Dry the impregnated C / C-SiC composite material at 90℃ for 10 hours;

[0166] 6. The dried C / C-SiC composite material was heat-treated at 1000℃ for 2 hours under a nitrogen atmosphere to transform the precursors inside the C / C-SiC composite material into antioxidant materials such as silicon dioxide, zirconium dioxide, and zirconium silicate. The final product composition included 38wt% carbon, 14wt% silicon, 44wt% silicon carbide, 2wt% silicon oxide, 1wt% zirconium oxide, and 1wt% zirconium silicate, with a density of 2.37 g / cm³. 3 The porosity is 1.2%.

[0167] 7. The final product was oxidized at 1250℃ for 300 h, and the oxidation weight loss rate was 4.8 wt%.

[0168] Comparative Example 1

[0169] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.1 g / cm³. 3 The porosity is 8%.

[0170] 2. After oxidizing at 1250℃ for 300 h, the oxidation weight loss rate was 20.8 wt%.

[0171] Comparative Example 2

[0172] 1. The C / C-SiC composite matrix was cut into 50mm×50mm×10mm pieces as required. The matrix surface was polished with 500-grit sandpaper, then ultrasonically cleaned with anhydrous ethanol for 30 minutes, and finally dried in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material was 2.2 g / cm³. 3 The porosity is 5%.

[0173] 2. After oxidizing at 1250℃ for 300h, the oxidation weight loss rate was 17.2wt%.

[0174] Comparative Example 3

[0175] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.0 g / cm³. 3 The porosity is 10%.

[0176] 2. After oxidizing at 1250℃ for 300h, the oxidation weight loss rate was 32.9wt%.

[0177] Comparative Example 4

[0178] 1. Cut the C / C-SiC composite matrix into 50mm×50mm×10mm pieces as required. Polish the matrix surface with 500-grit sandpaper, then ultrasonically clean it with anhydrous ethanol for 30 minutes. Finally, dry it in an 80℃ oven for 24 hours. The density of the C / C-SiC composite material is 2.3 g / cm³. 3 The porosity is 2%;

[0179] 2. After oxidizing at 1250℃ for 300 h, the oxidation weight loss rate was 15.0 wt%.

[0180] Performance testing:

[0181] 1. Oxidative weight loss rate:

[0182] The sample was placed in a box furnace and oxidized at 1250℃ for 300 hours in air atmosphere. The mass of the sample before and after oxidation was measured, and the oxidation weight loss rate was determined. Oxidation weight loss rate = (mass before oxidation - mass after oxidation) / mass before oxidation × 100%.

[0183] 2. Density and porosity:

[0184] The density and porosity of the sample were determined using the Archimedes displacement method, and the calculation formula is as follows:

[0185]

[0186]

[0187] Where ρ is the sample density, in g / cm³. 3 ε - Sample porosity (%); ρwater - Deionized water density, g / cm³ 3 ;m 干 - Sample dry weight, g; m 湿 -Wet weight of the sample, g; m 浮 - The buoyant weight of the sample, in grams.

[0188] 3. Components in the final product:

[0189] Carbon content test: The sample was heat-treated at 400℃ for 48 hours in air atmosphere. The mass of the sample before and after heat treatment was weighed. Carbon content = (mass before heat treatment - mass after heat treatment) / mass before heat treatment × 100%.

[0190] Tests on the content of silicon carbide, silicon, zirconium oxide, and zirconium silicate: The crystal phase composition of silicon carbide, silicon, zirconium oxide, and zirconium silicate in the sample was tested using a D / max-rB type X-ray diffractometer.

[0191] Silica content test: Immerse the sample in 40% hydrofluoric acid solution for 48 hours to remove silica from the sample. Weigh the sample before and after immersion. Silica content = (mass before immersion - mass after immersion) / mass before immersion × 100%.

[0192] The test data above shows that the brake pads in this embodiment contain antioxidant materials and have a low oxidation weight loss rate, indicating that they have good antioxidant properties and a long service life.

[0193] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0194] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0195] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A brake disc, characterized in that Comprising: a substrate, the substrate having pores; an antioxidant material, the antioxidant material being loaded on the substrate, and at least part of the antioxidant material being contained in the pores; the antioxidant material comprising silicon dioxide.

2. The brake disc of claim 1, wherein, The antioxidant material further comprises at least one of zirconium oxide and zirconium silicate.

3. The brake disc of claim 2, wherein, The antioxidant material comprises the silicon dioxide, the zirconium oxide and the zirconium silicate in a mass ratio of 1:0.5-4.0:0.3-3.

0.

4. The brake disc of claim 1, wherein, The substrate comprises at least one of carbon fiber reinforced carbon matrix composite, carbon fiber reinforced carbon and silicon carbide double matrix composite.

5. The brake disc of claim 1, wherein, The substrate is the carbon fiber reinforced carbon and silicon carbide double matrix composite, and the carbon fiber reinforced carbon and silicon carbide double matrix composite comprises, based on the total mass of the brake disc: carbon 30wt%-40wt%; silicon carbide 5wt%-15wt%; silicon 35wt%-55wt%; silicon oxide 1wt%-5wt%; zirconium oxide 3wt%-8wt%; and zirconium silicate 5wt%-10wt%.

6. The brake disc of claim 1, wherein, The brake disc has a porosity of 1% to 10%; and / or the brake disc has a density of 2.0 g / cm 3 2.5 g / cm 3 ; and / or The density of the matrix is 1.9 g / cm 3 ~ 2.2 g / cm 3 ; and / or the porosity of the matrix is 2% ~ 15%.

7. The brake disc of claim 1, wherein, The oxidation loss rate is less than or equal to 14%.

8. A method of manufacturing a brake disc according to any one of claims 1 to 7, characterised in that, Comprising: (1) preparing a precursor solution comprising a silicon source; (2) placing a substrate in the precursor solution to obtain an impregnated substrate; (3) sequentially performing first drying and heat treatment on the impregnated substrate to obtain the brake disc.

9. The method of claim 8, wherein, The precursor solution comprises the silicon source and a zirconium source.

10. The method of claim 9, wherein, In the precursor solution, the molar ratio of silicon in the silicon source to zirconium in the zirconium source is 1-2:

1.

11. The method of claim 9, wherein, The silicon source comprises at least one of methyl orthosilicate, ethyl orthosilicate, isopropyl orthosilicate, butyl orthosilicate, methyltrimethoxysilane, diethyldiethoxysilane, tetraphenyl silicate, silicon tetrachloride and silicate; and / or The zirconium source comprises one or more of zirconium oxychloride, zirconium tetrachloride, zirconium n-propyl alcohol and zirconium isopropyl alcohol.

12. The method of claim 9, wherein, Step (1) comprises: mixing the silicon source with ethanol and water, adjusting the pH value of the solution to 1-3, and standing for 1-2 hours to obtain a hydrolysis solution; mixing the hydrolysis solution with a 0.5mol / L-2mol / L zirconium source aqueous solution, stirring at room temperature for 3-5 hours to obtain the precursor solution.

13. The method of claim 12, wherein, The mass ratio of the silicon source to ethanol and water is (2-5):(2-8):

1.

14. The method of claim 12, wherein, The pH value of the solution is adjusted by a pH adjuster, and the pH adjuster comprises at least one of hydrochloric acid, phosphoric acid and citric acid.

15. The method of claim 8, wherein, Before step (1), further comprising: sequentially polishing, cleaning and second drying the substrate.

16. The method of claim 8, wherein, Step (2) comprises sequentially: vacuum impregnation at room temperature for 2-3 hours; and pressure impregnation at 50-60°C and 0.3-0.6MPa for 1-2 hours.

17. The method of claim 8, wherein, In step (3): the first drying comprises drying treatment at 90-100°C for 8-12 hours; and / or the heat treatment comprises heat preservation at 1000-1200°C for 2-4 hours in a protective atmosphere.

18. A vehicle, characterized by Comprising the brake disc of any one of claims 1-7.

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