Cermet composites, process for producing them and arc tube incor

Details Cermet composites, process for producing them and arc tube incor Cermet composites, process for producing them and arc tube incor

1984-12-17

1986-07-29

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75228, 75232, 1481261, 148127, 419 6, 419 19, 419 30, 419 39, 419 57, 419 66, 428565, 428615, 428621, 428649, 428651, 428689, C22C 2912

Patent

active

046029567

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.

REFERENCES:
patent: 3780418 (1973-12-01), Horst
patent: 4299627 (1981-11-01), Shinohara et al.
patent: 4478787 (1984-10-01), Nadkarni et al.

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