C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
25/133
C04B 35/52 (2006.01) C04B 35/573 (2006.01)
Patent
CA 1092793
ABSTRACT OF THE DISCLOSURE In accordance with the invention there is provided a method for manufacturing a reaction bonded silicon carbide body by heating, in a vacuum or an inert atmosphere, to at least the melting temperature of elemental silicon, a porous compact con- sisting essentially of a substantially uniform mixture of sili- con carbide grain and finely divided carbon while said compact is in intimate surface-to-surface contact with a mixture of finely divided elemental silicon and a small amount of finely divided, uniformly distributed carbon, such silicon-carbon mixture preferably also being in the form of a compact. Upon such heating, a portion of the elemental silicon in the silicon- carbon mixture reacts with the carbon therein to form a friable, highly porous matrix of silicon carbide which functions to guide the flow of the remaining elemental silicon into the porous silicon carbide-carbon compact where it reacts with the carbon therein to form additional silicon carbide thereby to convert. the compact to a reaction bonded silicon carbide body.
323501
Coors Porcelain Company
Smart & Biggar
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