A kind of preparation method of b4c modified c/c-sic brake material

Abstract

The invention relates to a preparation method of a B4C modified C / C-SiC brake material. According to the method, a vacuum pressure dipping method is used for introducing a B4C powder material in a three-dimensional needle carbon felt with the initial density being 0.4 to 0.6g / cm<3>; CVI (chemical vapor infiltration) and RMI (reaction melt infiltration) are combined for preparing the C / C-SiC brake material. When the B4C modified C / C-SiC brake material is used, on one hand, the B4C is used as a self heeling component for achieving the protection effects on the carbon fiber and a carbon base body; the inoxidizability of the material can be obviously improved; on the other hand, the B4C has higher specific heat capacity; the integral specific heat capacity of the material can be improved; the braking temperature can be effectively reduced; the material friction performance stability is improved.

Description

technical field

[0001] The invention belongs to the preparation method of C / C-SiC composite material, relates to a kind of B 4 The preparation method of C modified C / C-SiC brake material is a kind of adopting vacuum pressure impregnation to B 4 C powder is introduced into the three-dimensional needle-punched carbon fiber preform, and B is prepared by chemical vapor deposition combined with reactive melt infiltration process 4 C Modified method of C / C-SiC brake material. Background technique

[0002] The brake device is the core component for aircraft, high-speed rail, and automobiles to achieve braking and ensure safe operation. It mainly converts kinetic energy into heat energy through the relative motion of the friction surface to achieve the purpose of braking. During the braking process, the brake device converts huge kinetic energy into heat energy in a very short time and dissipates it.

[0003] Literature Krenkel W.Cost Effective Processing of Cmc Composites by Mel...

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