Compositions: ceramic – Ceramic compositions – Carbide or oxycarbide containing
Patent
1994-03-15
1995-10-03
Group, Karl
Compositions: ceramic
Ceramic compositions
Carbide or oxycarbide containing
501 91, 501127, 423345, 423625, C04B 35577
Patent
active
054552125
ABSTRACT:
A method for producing alumina-silicon carbide ceramic powders by in situ production of silicon carbide particles by introducing a pyrolyzable carbon source, preferably a gaseous hydrocarbon, into a reactor containing an alumino-silicate, pyrolyzing the pyrolyzable carbon source to form carbon particles in situ, wherein the carbon particles are capable of reacting with a silicate in the alumino-silicate to form carbide products, and then reacting the silicate and the carbon particles in situ at an effective temperature, preferably at least 1450.degree. C. and more preferably at least 1500.degree. C., for a sufficient time to transform the alumino-silicate and the pyrolyzable carbon source into the composite ceramic powder having alumina (Al.sub.2 O.sub.3) and silicon carbide (SiC) as major phases.
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Das Chaklader Asoke C.
Lin Edmond C. Y.
Group Karl
The University of British Columbia
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