Cermet composites, process for producing them and arc tube incorporating them
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United States of America Patent
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Jul 29, 1986
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N/A
app pub date -
Dec 17, 1984
filing date -
Dec 17, 1984
priority date (Note) -
Expired
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Abstract
Composite cermets having a central core of a first cermet composition and one or more surrounding layers of different cermet compositions are formed by a multi-step pressing operation, followed by sintering. A tungsten/alumina or molybdenum/alumina composite cermet is useful as an end closure for alumina arc tubes of metal halide discharge lamps.
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