Tandem atomization method for ultra-fine metal powder

Details Tandem atomization method for ultra-fine metal powder Tandem atomization method for ultra-fine metal powder

1984-07-26

1986-12-02

O'Keefe, Veronica

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

266202, 75 05BA, 75 05BB, 264 11, B22D 2308

Patent

active

046262784

ABSTRACT:
Soluble gas is introduced in a melt material which is then atomized and rapidly cooled. The cooling drives the gas from solution, further disintegrating the atomized material to an ultra-fine powder. In one embodiment the atomization and rapid cooling are effected using a gas atomization die. Introduction of the soluble gas may be effected by addition of reactive constituents to the melt, for reactively forming such gas. Finer powders with desirable metallurgical properties are formed using a metallic melt.

REFERENCES:
patent: 2371105 (1945-03-01), Lepsoe
patent: 3510546 (1970-05-01), Wentzell
patent: 3840623 (1974-10-01), Olsson
patent: 4192673 (1980-03-01), Baba et al.
patent: 4233062 (1980-11-01), Siddall
Metals Handbook, 9th ed., vol. 7, Powder Metallurgy, American Society of Metals, Metals Park, Ohio 44073.
S. J. Savage and F. H. Froes, Journal of Metals, Apr. 1984, p. 20.
N. J. Grant, Journal of Metals, Jan. 1983, p. 20.

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