Process of producing fine spherical particles

Details Process of producing fine spherical particles Process of producing fine spherical particles

1986-09-08

1988-07-12

Brody, Christopher W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75 05BB, 75 05BC, 264 15, B22F 100

Patent

active

047567465

ABSTRACT:
A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of spherical particles selected from the group consisting of metals, metal alloys, ceramic glasses, crystalline ceramic materials, and combinations of these. The material is essentially free of elliptical shaped material and elongated particles having rounded ends. The material has a particle size of less than about 20 micrometers. The process for making the spherical particles involves mechanically reducing the size of a starting material to produce a finer powder the major portion of which has a particle size of less than about 20 micrometers. The finer powder is entrained in a carrier gas and passed through a high temperature zone at a temperature above the melting point of the powder to melt at least about 50% of the powder and form the spherical particles of the melted portion. The powder is then directly solidifed.

REFERENCES:
patent: 3974245 (1976-08-01), Cheney et al.
patent: 4264354 (1981-04-01), Cheethan

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