Sintered alpha silicon carbide body having equiaxed microstructure

Abstract From the Canadian patent

Abstract of the Disclosure, Pressureless sintered silicon carbide ceramic bodies having an equiaxed microstructure and an alpha crystalline habit can be produced by firing shaped bodies containing, finely divided silicon carbide boron source such as boron, carbide, carbon source such as phenolic resin and a temporary binder, at a sintering temperature of from about 1900°C to about 2250°C, depending on the sintering atmosphere under, conditions such that a coating of carbon source is maintained on the finely divided silicon carbide, and sufficient boron is maintained within the shaped body during firing. Boron can be maintained within the shaped body by various techniques such, as the use of …