Method for preparing C/C-SiC composite part and product prepared through method

Abstract

The invention belongs to the field of composites, and discloses a method for preparing a C / C-SiC composite part and a product prepared through the method. The method comprises the following steps that firstly, carbon fiber / phenolic resin composite powder is prepared by using a solvent evaporation method; secondly, according to a three-dimensional model of the part, the carbon fiber composite powder is molded into an initial molded blank by means of the 3D printing technology; thirdly, the initial molded blank is subjected primary densification and a C / C porous body is obtained; fourthly, the C / C porous body is subjected to a molten silicon infiltration reaction, high-temperature desilication and secondary densificaiton, and the final C / C-SiC part is obtained. By means of the method, the C / C-SiC composite part with a complex structure can be shaped in a near-net mode, the method is short in production period and low in cost, and the C / C-SiC composite part obtained through the method is low in residual silicon content and has excellent performance.

Description

technical field

[0001] The invention belongs to the field of composite materials, and more specifically relates to a preparation method of a C / C-SiC composite material part and a product thereof. Background technique

[0002] C / C-SiC composite material is a kind of composite material with carbon fiber as reinforcement and carbon and silicon carbide as matrix. It has low density, high strength, high temperature resistance, chemical corrosion resistance, high friction coefficient, low wear rate, and It has many advantages such as good thermal decay performance, and can be used as high-temperature structural materials, thermal protection materials, and brake materials in aerospace, energy, transportation and other fields. Such as rocket engine throat linings, nozzles and combustion chambers, heat exchangers for nuclear hydrogen production, brake discs for aircraft and high-speed trains, etc.

[0003] The structural forms of carbon fiber reinforcements in C / C-SiC composites mai...

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