Specialized metallurgical processes – compositions for use therei – Processes – Producing or purifying free metal powder or producing or...
Patent
1990-12-12
1993-09-07
Wyszomierski, George
Specialized metallurgical processes, compositions for use therei
Processes
Producing or purifying free metal powder or producing or...
75369, B22F 920
Patent
active
052424812
ABSTRACT:
A powder of tantalum, niobium, or an alloy thereof, having an oxygen content less than about 300 ppm, and the production thereof without exposure to a temperature greater than about 0.7 T.sub.H. A powder metallurgy formed product of tantalum, niobium, or an alloy thereof, having an oxygen content less than about 300 ppm, and the production thereof without exposure to a temperature greater than about 0.7 T.sub.H.
REFERENCES:
patent: 3697255 (1972-10-01), Baldwin et al.
patent: 4141720 (1979-02-01), Vartanian
patent: 4508563 (1985-04-01), Bernard et al.
patent: 4722756 (1988-02-01), Hard
patent: 4923531 (1990-05-01), Fisher
patent: 4954169 (1990-09-01), Behrens
patent: 4964906 (1990-10-01), Fife
Cabot Corporation
Koris David J.
Wyszomierski George
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