Crucibleless preparation of rapidly solidified fine particulates

Details Crucibleless preparation of rapidly solidified fine particulates Crucibleless preparation of rapidly solidified fine particulates

1981-10-29

1983-07-19

Hall, James R.

Plastic and nonmetallic article shaping or treating: processes

Formation of solid particulate material directly from molten...

Utilizing centrifugal force or rotating forming zone

B01J 206

Patent

active

043943322

ABSTRACT:
A mass of normally solid material, e.g. metal or metal alloy, which at a temperature within 25 percent of its equilibrium melting point .degree.K has a surface tension of 10 to 2500 dynes/cm. and a viscosity of 0.001 to 1 poise, is changed into fine solid particulates, preferably flake-like to almost spherical shape. A solid mass of the material has a portion thereof, e.g. tip or edge, unconfined by a crucible or the like, heated, such as by a flame or electron beam to alter that portion to a molten state whereby molten droplets or globules fall therefrom to contact a rapidly moving wall of a centrifugally disposed rotating liquid quench fluid, e.g. water or oil, and upon contacting are disrupted and broken up into finer globules or particles which are swept away with and quenched in the rapidly moving quench fluid to become rapidly solidified as fine particulates. These fine particulates subsequently are separated from the quench fluid and classified to find utility for example in powder metallurgical applications.

REFERENCES:
patent: 1782038 (1930-11-01), Haak
patent: 2040168 (1936-05-01), DeBats
patent: 2439772 (1948-04-01), Gow
patent: 3041672 (1962-07-01), Lyle
patent: 3320338 (1967-05-01), Lemelson
patent: 3896203 (1975-07-01), Maringer et al.
patent: 4124664 (1978-11-01), Maringer
P. Duwez et al., "Continuous Series of Metastable Solutions in Silver-Copper Alloys", J. Appl. Phys., 31, (1960), pp. 1136-1937.
R. Pond Jr. et al., "A Method of Producing Rapidly Solidified Filamentary Castings", Trans. Met. Soc. AIME, vol. 245, Nov. 1969, pp. 2475-1476.
331. Portion of "Japanese Association Collection of Talking Paper Draft Summary" (a.k.a. "Special Issue for the Toyama Meeting"), Eng. Transl. Title-Manufacture of lead filaments by a simple spinning method in which a rotating drum is used, distributed after Sep. 19, 1978, and by date of meeting on Oct. 3, 1978, by Japanese Metallurgy Association to members thereof.

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