Specialized metallurgical processes – compositions for use therei – Compositions – Consolidated metal powder compositions
Patent
1979-02-26
1981-01-06
Hunt, Brooks H.
Specialized metallurgical processes, compositions for use therei
Compositions
Consolidated metal powder compositions
75206, 75236, B22F 300, C22C 105, C22C 2900
Patent
active
042434130
ABSTRACT:
Ag-SnO alloy contact materials of such dimensions which are hard to achieve internal oxidation without producing depleted cores due to lack of tin oxides, are produced by metallurgically integrating pieces of said alloy material, said pieces being of such dimensions that they are easily internally oxidized without any depleted cores. Integration consists of congregating or assemblying said pieces by kneading under pressure and at a temperature higher than 700.degree. C. into a mass in which said pieces coalesce to each other without any distinctive silver interface thereamong, and through which tin oxides are uniformly dispersed substantially without any grain boundaries.
REFERENCES:
patent: 3933485 (1976-01-01), Shibata
patent: 3989516 (1976-11-01), Haarbye
patent: 4112197 (1978-09-01), Metz
Hirschorn, Introduction to Powder Metallurgy, APMI 1969, pp. 238-242.
Chugai Denki Kogyo Kabushiki-Kaisha
Hunt Brooks H.
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