Silicon nitride/silicon carbide composite powders
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United States of America Patent
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Jun 11, 1996
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app pub date -
Jun 7, 1995
filing date -
Apr 14, 1994
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Abstract
Prepare silicon nitride-silicon carbide composite powders by carbothermal reduction of crystalline silica powder, carbon powder and, optionally, crystalline silicon nitride powder. The crystalline silicon carbide portion of the composite powders has a mean number diameter less than about 700 nanometers and contains nitrogen. The composite powders may be used to prepare sintered ceramic bodies and self-reinforced silicon nitride ceramic bodies.
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