High density sintered silicon carbide - mix of silicon carbide carbon and boron sintered in carbon contg. atmos.

摘要

A sintered SiC body is produced from a mixt. of SiC, a boron containing material (0.3-10%B) and a carbonaceous material (1-15%C) which is formed into a green body and sintered in a C containing reducing atmosphere such as a hydnocarbon (less than 30 vol.% methane). The SiC powder preferably has a surface area of 3-14 m2/g and the sintering temp. is pref. below 2200 deg.C. Used for high temp. structural applicns. High density SiC is produced by sintering.