Surface treatment method of C/TiB2 composite

Abstract

The invention belongs to the field of surface treatment of carbon fiber reinforced ceramic-based composites and particularly discloses a surface treatment method of a C / TiB2 composite. The C / TiB2 composite is embedded in B4C powder and treated at the temperature of 950-1,100 DEG C under the vacuum condition; Ti powder, NH4Cl and Al2O3 powder are mixed uniformly, and mixed powder is obtained; the obtained mixed powder is used for embedding the treated C / TiB2 composite, and the C / TiB2 composite is subjected to a reaction at the temperature of 1,200-1,300 DEG C under the vacuum condition for 3-5 h and then naturally cooled. According to the method, a B4C layer is firstly deposited on the surface of the composite, Ti powder and residual silicon react to produce TiSi2, besides, the Ti powder can react with B4C on the surface to produce TiB2, and the performance of the composite is further stabilized.

Description

technical field

[0001] The invention belongs to the field of surface treatment of carbon fiber reinforced ceramic matrix composite materials, in particular to a C / TiB 2 Surface treatment methods for composite materials. Background technique

[0002] TiB 2 Because of its excellent performance, it is regarded as the most promising boride ceramic for wide application. It has good electrical conductivity, high melting point, hardness and corrosion resistance, making it suitable for making evaporating vessels, melting metal crucibles, cathodes of aluminum electrolytic cells, Spark plugs and other electrodes and contact switch materials are widely used; after compounding them with carbon materials, the ablation resistance performance is improved, and it has the characteristics of small material specific gravity, high thermal shock stability, good electrical conductivity and friction and wear resistance. , and the preparation cost is low, it is a kind of carbon / ceramic composite ...

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