Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...
Patent
1991-11-12
1992-12-22
Langel, Wayne
Specialized metallurgical processes, compositions for use therei
Processes
Producing or purifying free metal powder or producing or...
75354, 75357, 75359, 75360, 75361, 75363, 75370, B22F 900
Patent
active
051731088
ABSTRACT:
A method is disclosed for producing an agglomerated molybdenum plasma spray powder with a controlled level of oxygen which comprises forming a relatively uniform mixture of agglomerated powders containing molybdenum dioxide and one or more ammonium-containing compounds of molybdenum wherein the mixture has an oxygen content of greater than about 25% by weight and reducing the mixture in a moving bed furnace at a temperature of from about 700.degree. C. to about 1000.degree. C. for a sufficient time to remove a portion of the oxygen therefrom and form reduced molybdenum powder agglomerates having an oxygen content of no greater than about 25% by weight. The reduction takes place in the direction from the outside surface of the agglometates to the inside surface.
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Bos Steven
GTE Products Corporation
Langel Wayne
Levy Elizabeth A.
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