Method of making .alpha. type silicon nitride powder

Details Method of making .alpha. type silicon nitride powder Method of making .alpha. type silicon nitride powder

1976-09-22

1978-09-26

Cooper, Jack

Chemistry of inorganic compounds

Silicon or compound thereof

Binary compound

106 735, C01B 2106

Patent

active

041170954

ABSTRACT:
.alpha.-Silicon nitride powder which is used as a raw material for the preparation of high strength silicon nitride with additives such as magnesia and yttrium oxide, and other sintered materials suitable for high temperature gas turbine engine components and the like, is prepared by heating a powdered mixture of silica, carbon and metallic silicon in a nitrogen containing atmosphere and then subjecting the material to a heat treatment in an oxidizing atmosphere for decarbonization of said material.

REFERENCES:
patent: 1054901 (1913-03-01), Bosch et al.
patent: 1104384 (1914-07-01), Potter et al.
patent: 3244480 (1966-04-01), Johnson et al.
patent: 3728436 (1973-04-01), Krikorov
patent: 3855395 (1974-12-01), Cutler
patent: 3959446 (1976-05-01), Mazdiyasni et al.
Komeya et al. "J. of Materials Science" 10/1975, pp. 1243-1246.

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