Process for manufacturing fine powder of metal

Details Process for manufacturing fine powder of metal Process for manufacturing fine powder of metal

1977-12-06

1980-05-13

Stallard, W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BC, B22F 102

Patent

active

042026865

ABSTRACT:
A metal in a molten state, which is to be pulverized, is put in a vessel in coexistence with an assistant-powder consisting of a material which has a higher melting point than said metal and is difficult to chemically react with said metal and/or difficult to form a solid solution with said metal. Then, said molten metal and said assistant-powder are mixed thoroughly by stirring. Then, while continuing said stirring, said molten metal and said assistant-powder are slowly cooled until the temperature of the former reaches at least its solidus point to pulverize said metal into a fine powder and to form a composite powder having a structure in which said assistant-powder adheres to said fine powder to cover the entire surface of each particle of said fine powder. And then, said assistant-powder is separated and removed from said composite powder, thereby obtaining a fine powder of said metal.

REFERENCES:
patent: 1993598 (1935-03-01), DeBats
patent: 2037672 (1936-04-01), Zeiss
patent: 2396101 (1946-03-01), Hensel et al.
patent: 3036938 (1962-05-01), Hudson
patent: 3652259 (1972-03-01), Knopp

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