Si.sub.3 N.sub.4 -A1.sub.2 O.sub.3 composite sintered bodies and method of producing the same
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United States of America Patent
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Dec 22, 1992
Issued Date -
N/A
app pub date -
Jul 23, 1990
filing date -
Nov 9, 1987
priority date (Note) -
Expired
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Abstract
An Si.sub.3 N.sub.4 -Al.sub.2 O.sub.3 composite sintered body suitable for use in high-temperature structural materials consists of .alpha.-Al.sub.2 O.sub.3 and at least one crystal phase of Si.sub.3 N.sub.4 and sialon and is produced by sintering a shaped body of a particular Si.sub.3 N.sub.4 -Al.sub.2 O.sub.3 mixed powder at 1,500.degree.-1,900.degree. C.
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