Polymer precursor for silicon carbide/aluminum nitride ceramics
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United States of America Patent
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Aug 6, 1996
Issued Date -
N/A
app pub date -
Jan 15, 1993
filing date -
Feb 13, 1992
priority date (Note) -
Expired
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Abstract
A block copolymer is prepared by reacting an aluminum-nitrogen polymer and a silazane polymer at a temperature not greater than 400.degree. C. Block copolymers containing alkenyl or alkynyl groups can be crosslinked by supplying energy to generate free radicals. An AlN/SiC-containing ceramic is formed by pyrolyzing the crosslinked block copolymer in a nonoxidizing atmosphere.
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