WO2017107735A1

WO2017107735A1 - Method for preparing carbon-ceramic brake material and method for preparing carbon-ceramic brake disc

Info

Publication number: WO2017107735A1
Application number: PCT/CN2016/107047
Authority: WO
Inventors: 刘军
Original assignee: 深圳市勒马制动科技有限公司
Priority date: 2015-12-25
Filing date: 2016-11-24
Publication date: 2017-06-29
Also published as: CN105565839A; CN105565839B

Abstract

Provided is a method for preparing a carbon-ceramic brake material, comprising the following steps: 1) preparing a first carbon fibre preform; 2) preparing a phenolic resin solution; 3) preparing a mixed slurry of the phenolic resin and a ceramic powder; 4) preparing a second carbon fibre preform; 5) drying the second carbon fibre preform; 6) hot pressing and curing the dried preform; 7) cracking a carbon/phenolic-ceramic composite material; and 8) processing a first porous carbon/carbon-ceramic powder composite material at high temperature. Provided is a method for preparing a carbon-ceramic brake disc, further comprising, in addition to the above 8 steps, the following steps: 9) pre-processing; 10) silicon infiltration processing a first brake disc; and 11) final processing.

Description

Method for preparing carbon ceramic brake material and preparation method of carbon ceramic brake disc

Technical field

The invention relates to the technical field of brake materials, in particular to a method for preparing a carbon ceramic brake material and a brake disc.

Background technique

As a new type of brake material, carbon ceramic brake material has the advantages of low density, stable friction coefficient, large braking ratio, no corrosion and long service life compared with traditional metal and semi-metal brake materials, especially for long time. There is no thermal decay when braking continuously. Compared with the carbon-carbon brake material, it has excellent oxidation resistance, low attenuation of wet friction performance, high static friction coefficient and long service life, which greatly improves the safety of the brake. It has broad application prospects in the field of braking such as airplanes, tanks, high-speed trains and high-end cars.

At present, the German SGL carbon-ceramic brake material has been successfully applied to high-end cars, and its life span is more than four times that of steel brake materials, which can meet the needs of the car's full life (driving more than 300,000 agong) without the need to replace the brake disc. The carbon ceramic brake discs of Northwestern Polytechnical University and Xi'an Aviation Brake Technology Co., Ltd. have been successfully applied to military aircraft, which greatly improved the service life of brake discs and solved the problem of low static braking torque and wet friction performance of carbon-carbon brake materials. Improve the safety of aircraft brakes. For high-speed trains, the use of conventional brake materials not only improves the safety and longevity of the use, but also significantly reduces the weight of the train (about 5 tons / column), saving energy.

Carbon ceramic brake materials have the above excellent performance, but the application promotion speed is very slow, mainly because the cost is too high. At present, there are two methods for preparing carbon ceramic brake materials: one is usually obtained by hot pressing cracking of short fiber prepreg, and then silicon is obtained; but in this process, the fiber is first impregnated with resin, dried, chopped, and then Hot pressing cracking, the preparation process is complicated, and the short fiber reinforced carbon ceramic brake material is obtained, and the performance is low, and the reliability is not as good as the three-dimensional needling structure. The other is obtained by chemical vapor deposition of pyrolysis carbon through three-dimensional acupuncture preforms, and then silicon is obtained; however, the production cycle of the process is long, the cost is high, and it is difficult to promote.

Summary of the invention

In order to avoid the deficiencies of the prior art, the present invention provides a method for preparing a carbon ceramic brake material and a brake disc, which has a simple process and can greatly reduce the manufacturing cost of the material, and the carbon ceramic brake material produced has good performance. Mechanics, thermophysics, friction and wear properties.

The first object of the present invention can be achieved by adopting the following technical solutions:

A method for preparing a carbon ceramic brake material, comprising the following steps:

1) preparation of the first carbon fiber preform: a plurality of layers of a single layer of 0° non-woven fabric, a tire mesh, a 90° laid fabric, and a tire mesh are sequentially cycled to a predetermined thickness to obtain a first carbon fiber preform;

2) Preparation of phenolic resin solution: mixing thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a ratio of 1 to 2:1 to 3:1 to 3:0.1 to 0.2 by weight to prepare phenolic resin Resin solution;

3) Preparation of mixed slurry of phenolic resin and ceramic powder: adding ceramic powder to the phenolic resin solution to obtain a mixture, wherein the amount of the ceramic powder is the amount of the phenolic resin solution 20-50wt%; adjusting the pH of the mixture to 9-11, ball milling for 24-48h, formulated into a mixture of phenolic resin and ceramic powder;

4) Preparation of a second carbon fiber preform: under vacuum, the first carbon fiber preform is immersed in the mixed slurry of the phenolic resin and the ceramic powder, impregnated for 10-30 minutes, and then pressurized by an inert gas, pressure After 1-2 MPa, after holding pressure for 10-30 min; releasing pressure, taking out the first carbon fiber preform impregnated with the mixed slurry of phenolic resin and ceramic powder to obtain a second carbon fiber preform;

5) drying of the second carbon fiber preform: drying the second carbon fiber preform to obtain a dried preform; drying temperature is 40-60 ° C, drying time is 12-24 h;

6) drying the preform to be hot-pressed: the dried preform is cured at a temperature of 150-180 ° C and a pressure of 10-30 MPa for 15-30 min to obtain a carbon/phenolic-ceramic composite;

7) carbon/phenolic-ceramic composite cracking: the carbon/phenolic-ceramic composite material is subjected to cracking treatment under inert gas protection to obtain a first porous carbon/carbon-ceramic powder composite material;

8) The first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment: the first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment under inert gas protection to obtain a second porous carbon. / Carbon-ceramic powder composite, the ultimate carbon ceramic brake material.

Preferably, the first carbon fiber preform is prepared in a step 1) by a relay needle punching method.

Preferably, the needle density in step 1) is 30 needles/cm ² and the bulk density is 0.3-0.45 g/cm ³ , wherein the volume ratio of the tire web layer to the non-woven fabric layer is 1:1-2.

Preferably, the main component of the ceramic powder in the step 3) is SiC, B ₄ C or BN; and the ceramic powder has a particle size of 0.5-5 μm.

Preferably, ammonia and water are added dropwise in step 3) to adjust the pH of the mixture.

Preferably, the mixture is ball milled in a ball mill in step 3).

Preferably, the vacuum pressure in step 4) is 1000 Pa.

Preferably, the inert gas in step 4), step 7) and step 8) is argon or nitrogen.

Preferably, in the cracking treatment of the carbon/phenolic-ceramic composite in step 7), the pyrolysis heating rate is 1-5 ° C / min, the highest cracking temperature is 900-1100 ° C; the first plurality in step 8) When the pore carbon/carbon-ceramic powder composite material is subjected to high temperature treatment, the heat treatment temperature is 1800-2000 ° C, and the temperature is kept for 1 h.

The second object of the present invention can be achieved by adopting the following technical solutions:

A method for preparing a carbon ceramic brake disc comprises the following steps:

3) preparation of a mixed slurry of a phenolic resin and a ceramic powder: adding a ceramic powder to the phenolic resin solution to obtain a mixture, wherein the amount of the ceramic powder is 20-50% by weight of the amount of the phenolic resin solution; adjusting the mixture After the pH value is 9-11, the ball mill is used for 24-48 hours, and is prepared into a mixed slurry of phenolic resin and ceramic powder;

8) The first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment: the first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment under inert gas protection to obtain a second porous carbon. /carbon-ceramic powder composite;

9) pre-processing: processing the second porous carbon/carbon-ceramic powder composite material according to a preset drawing of the brake disc to obtain a first brake disc;

10) siliconizing treatment of the first brake disc: the first brake disc is subjected to siliconizing treatment in a vacuum furnace to obtain a second brake disc; the infiltration temperature is 1600-1800 ° C, and the holding time is 1 to 5 h;

11) Final processing: grinding the two friction surfaces of the second brake disc according to preset requirements Cutting, get carbon ceramic brake discs.

Among them, carbon ceramic brake discs can also be called carbon ceramic brake pads.

Preferably, in the step 9), when the second porous carbon/carbon-ceramic powder composite material is processed according to a preset drawing of the brake disc, a machining allowance of 0.3-1 mm is reserved on one side of the thickness direction of the friction surface. .

The technical solution provided by the present invention may include the following beneficial effects:

(1) The preparation method provided by the present invention has a short preparation cycle and low cost. The impregnating slurry adopts a mixed slurry of phenolic resin and ceramic powder, and adopts hot pressing curing to improve the solid phase yield during material cracking, which can ensure the requirement of preform density required for silicon infiltration by one impregnation cracking, and reduce the preparation cycle. Because if a pure phenolic resin solution is used as the impregnation liquid, the atmospheric pressure solidification, and the cracking process, it usually takes 3-4 times of the impregnation cracking process to meet the requirements.

(2) A three-dimensional needle-punched carbon fiber preform prepared by the method provided by the present invention, wherein the volume of the tire mesh is more than twice as large as that of the three-dimensional needle-punched carbon fiber preform currently used on the market, so that the final carbon ceramic brake The ceramic content of the material is increased, which greatly improves the friction and wear resistance of the material.

(3) In the method for preparing a carbon ceramic brake disc provided by the present invention, the carbon ceramic brake material is pre-processed and then subjected to siliconizing treatment, thereby greatly reducing processing difficulty and processing cost. Because the material strength is low and easy to process before siliconizing, the hardness and strength of the material after siliconizing increase, which is difficult to process.

(4) The preparation method of the carbon ceramic brake material and the brake disc provided by the invention is simple in process, good in repeatability, and suitable for industrial mass production.

detailed description

The present invention will be further described below in conjunction with the drawings and specific embodiments.

Example 1

Step 1, the preparation of the first carbon fiber preform; a plurality of layers of a single layer of 0° non-woven fabric, a tire mesh, a 90° non-woven fabric, and a tire mesh are sequentially cycled to a design thickness, and are prepared by a relay acupuncture method; The needle density is 30 needles/cm ² and the bulk density is about 0.3 g/cm ³ , wherein the volume ratio of the tire web layer to the non-woven fabric layer is about 1:1.

Step 2: preparation of a phenolic resin solution; mixing a thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a ratio of 1:1:1:0.1 by weight to prepare a phenolic resin solution.

Step 3, preparing a mixed slurry of a phenolic resin and a ceramic powder; adding a ceramic powder having a main component of SiC and a particle size of 1 μm to the phenolic resin solution prepared in the step 2, wherein the amount of the ceramic powder is 35 wt% of the amount of the phenolic resin solution; Aqueous ammonia and hydrochloric acid were added dropwise to adjust the pH of the mixture to 11; the mixture was ball milled in a ball mill for 48 hours to prepare a mixed slurry of a phenol resin and a ceramic powder.

Step 4, preparation of the second carbon fiber preform; the first carbon fiber preform of the step 1 is immersed in the mixed slurry of the phenol resin and the ceramic powder of the step 3 under vacuum condition (1000 Pa), impregnated for 10 min; The slurry was pressurized by nitrogen, the pressure was 1 MPa, and the pressure was maintained for 30 minutes; the first carbon fiber preform impregnated with the phenol resin and the ceramic powder was taken out and the second carbon fiber preform was obtained.

Step 5, the second carbon fiber preform is dried; the second carbon fiber preform of step 4 is dried in an oven to obtain a dried preform; the drying temperature is 40 ° C, and the drying time is 24h.

Step 6: drying the preform by hot pressing; the dried preform of step 5 is heated at 150 ° C under a pressure of 30 MPa for 30 min to obtain a carbon/phenolic-ceramic composite.

Step 7: Cleavage of carbon/phenolic-ceramic composite; the carbon/phenolic-ceramic composite prepared in step 6 is subjected to cracking treatment at a heating rate of 5 ° C/min, a maximum cracking temperature of 1000 ° C, and argon gas as a protective gas. The first porous C/C-SiC composite material is obtained.

Step 8: The first porous C/C-SiC composite material is subjected to high temperature treatment; the first porous C/C-SiC composite material prepared in the step 7 is subjected to high temperature treatment under argon to obtain a second porous C/C. - SiC composite material; heat treatment temperature is 1800 ° C, holding time 1 h.

Step 9: Pre-processing; the second porous C/C-SiC composite material prepared in the step 8 is processed according to the product drawing of the brake disc, wherein the thickness of the friction surface is reserved for 0.5 mm machining allowance on one side, and the remaining dimensions are The drawings are machined to the product size requirements to obtain the first brake disc.

Step 10: The first brake disc is siliconized; the first brake disc processed in step 9 is subjected to siliconizing treatment in a vacuum furnace to obtain a second brake disc; the infiltration temperature is 1650 ° C, and the heat is kept for 5 h.

Step 11: Final processing. The two friction surfaces of the second brake disc of step 10 are ground according to the product requirements to obtain a carbon ceramic brake disc.

Example 2

Step 1, the preparation of the first carbon fiber preform; a plurality of layers of a single layer of 0° non-woven fabric, a tire mesh, a 90° non-woven fabric, and a tire mesh are sequentially cycled to a design thickness, and are prepared by a relay acupuncture method; The needle density is 30 needles/cm ² and the bulk density is about 0.45 g/cm ³ , wherein the volume ratio of the tire web layer to the non-woven fabric layer is about 1:2.

Step 2: preparation of a phenolic resin solution; mixing a thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a ratio of 2:1:1:0.2 by weight to prepare a phenolic resin solution.

Step 3, preparing a mixed slurry of a phenolic resin and a ceramic powder; adding a ceramic powder having a main component of B ₄ C and a particle size of 5 μm to the phenolic resin solution prepared in the step 2, the amount of the ceramic powder being 50% by weight of the amount of the phenolic resin solution Then, ammonia water and hydrochloric acid were added dropwise to adjust the pH of the mixture to 11; the mixture was ball milled in a ball mill for 48 hours to prepare a mixed slurry of a phenol resin and a ceramic powder.

Step 4, preparation of the second carbon fiber preform; the first carbon fiber preform of the step 1 is immersed in the mixed slurry of the phenol resin and the ceramic powder of the step 3 under vacuum condition (1000 Pa), impregnated for 10 min; The slurry was pressurized by nitrogen, the pressure was 1.5 MPa, and the pressure was maintained for 30 minutes; the first carbon fiber preform impregnated with the phenol resin and the ceramic powder was taken out and the second carbon fiber preform was obtained.

Step 5, the second carbon fiber preform is dried; the second carbon fiber preform of step 4 is dried in an oven to obtain a dried preform; the drying temperature is 60 ° C, and the drying time is 12 h.

Step 6: drying the preform by hot pressing; the dried preform of step 5 is heated at 180 ° C under a pressure of 10 MPa for 15 min to obtain a carbon/phenolic-ceramic composite.

Step 7: Carbon/phenolic-ceramic composite cracking; the carbon/phenolic-ceramic composite prepared in step 6 is subjected to cracking treatment at a heating rate of 2 ° C/min, a maximum cracking temperature of 1100 ° C, and argon gas as a protective gas. The first porous C/CB ₄ C composite was obtained.

Step 8: The first porous C/CB ₄ C composite material is subjected to high temperature treatment; the first porous C/CB ₄ C composite material prepared in the step 7 is subjected to high temperature treatment under argon to obtain a second porous C/CB. ₄ C composite material; heat treatment temperature is 2000 ° C, holding time 1 h.

Step 9: Pre-processing; the second porous C/CB ₄ C composite material prepared in the step 8 is processed according to the product drawing of the brake disc, wherein a 0.3 mm machining allowance is reserved on one side of the thickness direction of the friction surface, and the remaining dimensions are The drawings are machined to the product size requirements to obtain the first brake disc.

Step 10: The first brake disc is siliconized; the first brake disc processed in step 9 is subjected to siliconizing treatment in a vacuum furnace to obtain a second brake disc; the infiltration temperature is 1700 ° C, and the heat is kept for 2 h.

Example 3

Step 1, the preparation of the first carbon fiber preform; a plurality of layers of a single layer of 0° non-woven fabric, a tire mesh, a 90° non-woven fabric, and a tire mesh are sequentially cycled to a design thickness, and are prepared by a relay acupuncture method; The needle density is 30 needles/cm ² and the bulk density is about 0.4 g/cm ³ , wherein the volume ratio of the tire web layer to the non-woven fabric layer is about 1:1.5.

Step 2: preparation of a phenolic resin solution; mixing a thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a ratio of 1.5:2:2:0.15 by weight to prepare a phenolic resin solution.

Step 3, the preparation of the mixed slurry of the phenolic resin and the ceramic powder; adding the ceramic powder having a main component of BN and a particle size of 0.5 μm to the phenolic resin solution prepared in the step 2, the amount of the ceramic powder being 35 wt% of the amount of the phenolic resin solution; Then, ammonia water and hydrochloric acid were added dropwise to adjust the pH of the mixture to 9; the mixture was ball milled in a ball mill for 24 hours to prepare a mixed slurry of a phenol resin and a ceramic powder.

Step 4, preparation of the second carbon fiber preform; the first carbon fiber preform of the step 1 is immersed in the mixed slurry of the phenol resin and the ceramic powder of the step 3 under vacuum condition (1000 Pa), impregnated for 30 min; The slurry was pressurized by nitrogen, the pressure was 1 MPa, and the pressure was maintained for 10 minutes; the first carbon fiber preform impregnated with the phenol resin and the ceramic powder was taken out and the second carbon fiber preform was obtained.

Step 5, the second carbon fiber preform is dried; the second carbon fiber preform of step 4 is dried in an oven to obtain a dried preform; the drying temperature is 45 ° C, and the drying time is 20 h.

Step 6: drying the preform by hot pressing; the dried preform of step 5 is heated at 160 ° C under a pressure of 20 MPa for 20 min to obtain a carbon/phenolic-ceramic composite.

Step 7: carbon/phenolic-ceramic composite cracking; the carbon/phenolic-ceramic composite prepared in step 6 is subjected to cracking treatment at a heating rate of 3 ° C/min, a maximum cracking temperature of 900 ° C, and argon gas as a protective gas. The first porous C/C-BN composite material was obtained.

Step 8: The first porous C/C-BN composite material is subjected to high temperature treatment; the first porous C/C-BN composite material prepared in the step 7 is subjected to high temperature treatment under argon to obtain a second porous C/C. -BN composite material; heat treatment temperature is 1900 ° C, holding time 1 h.

Step 9: pre-processing; the second porous C/C-BN composite material prepared in step 8 is pressed According to the product drawings of the brake disc, the machining surface of the friction surface is reserved with a machining allowance of 1 mm on one side, and the remaining dimensions are processed according to the drawings to obtain the first brake disc.

Step 10: The first brake disc is siliconized; the first brake disc processed in step 9 is subjected to siliconizing treatment in a vacuum furnace to obtain a second brake disc; the infiltration temperature is 1800 ° C, and the heat is kept for 1 h.

Various other changes and modifications may be made by those skilled in the art in light of the above-described technical solutions and concepts, and all such changes and modifications are intended to fall within the scope of the appended claims.

Claims

A method for preparing a carbon ceramic brake material, comprising the steps of:

1) preparation of the first carbon fiber preform: a plurality of layers of a single layer of 0° non-woven fabric, a tire mesh, a 90° laid fabric, and a tire mesh are sequentially cycled to a predetermined thickness to obtain a first carbon fiber preform;

2) Preparation of phenolic resin solution: mixing thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a ratio of 1 to 2:1 to 3:1 to 3:0.1 to 0.2 by weight to prepare phenolic resin Resin solution;

3) preparation of a mixed slurry of a phenolic resin and a ceramic powder: adding a ceramic powder to the phenolic resin solution to obtain a mixture, wherein the amount of the ceramic powder is 20-50% by weight of the amount of the phenolic resin solution; adjusting the mixture After the pH value is 9-11, the ball mill is used for 24-48 hours, and is prepared into a mixed slurry of phenolic resin and ceramic powder;

4) Preparation of a second carbon fiber preform: under vacuum, the first carbon fiber preform is immersed in the mixed slurry of the phenolic resin and the ceramic powder, impregnated for 10-30 minutes, and then pressurized by an inert gas, pressure After 1-2 MPa, after holding pressure for 10-30 min; releasing pressure, taking out the first carbon fiber preform impregnated with the mixed slurry of phenolic resin and ceramic powder to obtain a second carbon fiber preform;

5) drying of the second carbon fiber preform: drying the second carbon fiber preform to obtain a dried preform; drying temperature is 40-60 ° C, drying time is 12-24 h;

6) Drying and curing of the preform: the dried preform is cured at a temperature of 150-180 ° C and a pressure of 10-30 MPa for 15-30 min to obtain a carbon/phenolic-ceramic composite. ;

7) Carbon/phenolic-ceramic composite cracking: the carbon/phenolic-ceramic composite is subjected to cracking treatment under inert gas protection to obtain a first porous carbon/carbon-ceramic powder complex. Composite material

8) The first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment: the first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment under inert gas protection to obtain a second porous carbon. / Carbon-ceramic powder composite, the ultimate carbon ceramic brake material.
The method for preparing a carbon ceramic brake material according to claim 1, wherein the first carbon fiber preform is prepared by a relay needle punching method in the step 1).
The method for preparing a carbon ceramic brake material according to claim 1, wherein the needle density in step 1) is 30 needles/cm 2 and the bulk density is 0.3-0.45 g/cm 3 , wherein the tire mesh layer has no The volume ratio of the weft layer is 1:1-2.
The method for preparing a carbon ceramic brake material according to claim 1, wherein the main component of the ceramic powder in the step 3) is SiC, B 4 C or BN; and the ceramic powder has a particle size of 0.5-5 μm.
The method for preparing a carbon ceramic brake material according to claim 1, wherein the pH of the mixture is adjusted by adding ammonia water and hydrochloric acid to the step 3).
The method for preparing a carbon ceramic brake material according to claim 1, wherein the vacuum pressure in step 4) is 1000 Pa.
The method for preparing a carbon ceramic brake material according to claim 1, wherein the inert gas in the step 4), the step 7) and the step 8) is argon or nitrogen.
The method for preparing a carbon ceramic brake material according to claim 1, wherein in the cracking treatment of the carbon/phenolic-ceramic composite material in the step 7), the pyrolysis heating rate is 1-5 ° C / min, and the highest cracking temperature is obtained. When the first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment in 900-1100 ° C; in step 8), the heat treatment temperature is 1800-2000 ° C, heat preservation 1h.
A method for preparing a carbon ceramic brake disc according to a method for preparing a carbon ceramic brake material according to any one of claims 1-8, characterized in that it comprises the following steps:

1) preparation of the first carbon fiber preform: a plurality of layers of a single layer of 0° non-woven fabric, a tire mesh, a 90° laid fabric, and a tire mesh are sequentially cycled to a predetermined thickness to obtain a first carbon fiber preform;

2) Preparation of phenolic resin solution: mixing thermoplastic phenolic resin, ethanol, acetone and hexamethylenetetramine in a ratio of 1 to 2:1 to 3:1 to 3:0.1 to 0.2 by weight to prepare phenolic resin Resin solution;

3) preparation of a mixed slurry of a phenolic resin and a ceramic powder: adding a ceramic powder to the phenolic resin solution to obtain a mixture, wherein the amount of the ceramic powder is 20-50% by weight of the amount of the phenolic resin solution; adjusting the mixture After the pH value is 9-11, the ball mill is used for 24-48 hours, and is prepared into a mixed slurry of phenolic resin and ceramic powder;

4) Preparation of a second carbon fiber preform: under vacuum, the first carbon fiber preform is immersed in the mixed slurry of the phenolic resin and the ceramic powder, impregnated for 10-30 minutes, and then pressurized by an inert gas, pressure After 1-2 MPa, after holding pressure for 10-30 min; releasing pressure, taking out the first carbon fiber preform impregnated with the mixed slurry of phenolic resin and ceramic powder to obtain a second carbon fiber preform;

5) drying of the second carbon fiber preform: drying the second carbon fiber preform to obtain a dried preform; drying temperature is 40-60 ° C, drying time is 12-24 h;

6) Drying and curing of the preform: the dried preform is cured at a temperature of 150-180 ° C and a pressure of 10-30 MPa for 15-30 min to obtain a carbon/phenolic-ceramic composite. ;

7) carbon/phenolic-ceramic composite cracking: the carbon/phenolic-ceramic composite material is subjected to cracking treatment under inert gas protection to obtain a first porous carbon/carbon-ceramic powder composite material;

8) The first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment: the first porous carbon/carbon-ceramic powder composite material is subjected to high temperature treatment under inert gas protection to obtain a second porous carbon. /carbon-ceramic powder composite;

9) pre-processing: processing the second porous carbon/carbon-ceramic powder composite material according to a preset drawing of the brake disc to obtain a first brake disc;

10) siliconizing treatment of the first brake disc: the first brake disc is subjected to siliconizing treatment in a vacuum furnace to obtain a second brake disc; the infiltration temperature is 1600-1800 ° C, and the holding time is 1-5 h;

11) Final processing: the two friction surfaces of the second brake disc are ground according to a preset requirement to obtain a carbon ceramic brake disc.
The method for preparing a carbon ceramic brake disc according to claim 9, wherein in the step 9), the second porous carbon/carbon-ceramic powder composite material is processed according to a preset drawing of the brake disc, wherein A machining allowance of 0.3-1 mm is reserved on one side in the thickness direction of the friction surface.