Chemistry of inorganic compounds – Silicon or compound thereof – Binary compound
Patent
1975-10-03
1978-01-10
Thomas, Earl C.
Chemistry of inorganic compounds
Silicon or compound thereof
Binary compound
264 295, C01B 3136
Patent
active
040679551
ABSTRACT:
A method of forming a silicon carbide article is disclosd. Selected weight percentages of silicon carbide particles, graphite particles, if desired, and a thermosetting binder are mixed together and molded into an article by molding techniques which operate on the basis that the thermosetting binder forms a continuous medium about all the particles supported therein. The molded article is heated in the absence of oxygen and the thermosetting binder breaks down to form a low density, vitreous carbon phase. The article is heated in the absence of oxygen to a selected temperature at which the article is maintained for a period of time in a gaseous environment consisting of nitrogen preferably with a small amount of hydrogen therein. The hydrogen-nitrogen treatment is effective to cleanse the article and insure that there is an adequate pore structure through the article for a later siliciding operation to be carried out thereon. The article is silicided at an elevated temperature by penetration of the article through its pore structure with a reactable form of silicon.
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Special Ceramics - 1973 - Forrest et al. - pp. 99-123.
Noakes Jack E.
Sato Hiroshi
Terner Leslie L.
Ford Motor Company
Johnson William E.
Thomas Earl C.
Wheelock Eugene T.
Zerschling Keith L.
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