A kind of preparation method of carbon ceramic brake disc
A brake disc and carbon-ceramic technology, applied in the field of carbon-ceramic composite braking, can solve the problems of Si residue, Si affecting the friction and wear performance of products, and damage to the overall strength of materials, and achieve the effect of uniform and reasonable fiber distribution
Active Publication Date: 2021-09-07
德翼高科(杭州)科技有限公司
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Problems solved by technology
[0005] This is because if the C / C density is too high, there will be fewer pores, and the reaction between Si and pyrolytic carbon will not be sufficient, which will cause some Si residues, and the residual Si will inevitably affect the friction and wear properties of the product; if the C / C density is too low , the pores are large, and after the reaction between Si and pyrolytic carbon is completed, it will continue to react with carbon fibers, resulting in damage to the overall strength of the material
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment
[0023] A certain type of aircraft carbon ceramic brake disc test.
[0024] (1) First prepare the carbon fiber prefabricated body of a certain type of aircraft, as follows:
[0025] The carbon fiber is made of 12K carbon fiber, compounded with latitude-free unidirectional carbon cloth and carbon fiber mesh tire, and the laminate is laid in the direction of carbon cloth fiber at 0° / 60° / 120°, and the thickness of single static, double static and dynamic discs are respectively paved to 20mm , 23mm and 25mm thick, and guarantee (15±1) layer / cm, bulk density (0.6±0.03) g / cm 3 ; Cut 4 pieces, 4 pieces and 7 pieces respectively according to the single static, double static and dynamic disk specifications of a certain type of carbon ceramic brake disc.
[0026] (2) CVI densification.
[0027] Put the carbon fiber green body prepared above into the CVI furnace, use natural gas as the carbon source gas, and carry out CVI densification, and perform the following operations in three stag...
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Abstract
The invention discloses a method for preparing a carbon ceramic brake disc, which comprises the following steps: ① preparing a carbon fiber prefabricated body; ② CVI densification: putting the carbon fiber prefabricated body prepared above into a CVI furnace, using natural gas as a carbon source gas, and performing CVI Densification, after pre-deposition, accelerated deposition, and gap adjustment deposition, the C / C brake disc is obtained; ③Graphitization treatment: Put the C / C brake disc into a high-temperature heat treatment furnace to obtain the required carbon ceramic brake disc. The present invention can accurately and effectively control the density and open porosity of the carbon ceramic preform, and the density of the carbon ceramic preform prepared by the present invention can be precisely controlled at (1.45±0.05) g / cm 3 , The open porosity is (25±5)%.
Description
technical field [0001] The invention belongs to the field of carbon-ceramic composite braking, and in particular relates to a preparation method of a carbon-ceramic brake disc. Background technique [0002] Carbon-ceramic composite brake material (hereinafter referred to as carbon-ceramic) is a new type of composite material composed of high-strength carbon fiber as reinforcement and pyrolytic carbon and silicon carbide as the matrix. The advantages of metallurgical brake materials and C / C brake materials are integrated, and effectively overcome the shortcomings of the above two materials. It has the advantages of light weight, high specific strength, large specific heat, stable friction performance, stable mechanical properties, etc., especially High impact toughness, strong resistance to seawater and salt spray corrosion. [0003] At present, some major developed countries in the world are researching carbon ceramic brake discs to replace the C / C brake discs currently in ...
Claims
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IPC IPC(8): C04B35/83C04B35/622C04B38/00F16D65/12
CPCC04B35/622C04B35/83C04B38/00C04B2235/5256C04B2235/614C04B2235/6562C04B2235/6567C04B2235/658C04B2235/6581C04B2235/77F16D65/125F16D2200/0034F16D2200/0047F16D2200/0082C04B38/0067C04B38/0074
Inventor 孔令华罗瑞盈赵美玲
Owner 德翼高科(杭州)科技有限公司