In situ production of silicon carbide reinforced ceramic composites
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United States of America Patent
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Mar 17, 1992
Issued Date -
N/A
app pub date -
Mar 12, 1991
filing date -
Sep 19, 1989
priority date (Note) -
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Abstract
A method of producing ceramic composites of Al.sub.2 O.sub.3 reinforced by shaped SiC particles preferably shaped as fine particles (random), platelets, whiskers or fibres by in situ production of SiC particles by heating a mixture of carbon particles of the desired shape with silicates of Al.sub.2 O.sub.3 to a temperature above 1500.degree. C., convert the silicates and carbon to Al.sub.2 O.sub.3 and SiC to produce in situ SiC particles of the desired shape and provide a ceramic powder that may be densified by techniques such as hot pressing, isostatic pressing or sintering.
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