Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1978-12-28
1980-11-18
Sebastian, Leland A.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75232, 264 05, 4285395, B22F 104
Patent
active
042343380
ABSTRACT:
Thermal shock resistant cermet insulators containing 0.1-20 volume % metal present as a dispersed phase. The insulators are prepared by a process comprising the steps of (a) providing a first solid phase mixture of a ceramic powder and a metal precursor; (b) heating the first solid phase mixture above the minimum decomposition temperature of the metal precursor for no longer than 30 minutes and to a temperature sufficiently above the decomposition temperature to cause the selective decomposition of the metal precursor to the metal to provide a second solid phase mixture comprising particles of ceramic having discrete metal particles adhering to their surfaces, said metal particles having a mean diameter no more than 1/2 the mean diameter of the ceramic particles, and (c) densifying the second solid phase mixture to provide a cermet insulator having 0.1-20 volume % metal present as a dispersed phase.
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Johnson William R.
Morgan Chester S.
Denny James E.
Hamel Stephen D.
Sebastian Leland A.
The United States of America as represented by the United States
Uzzell Allen H.
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