Process for producing spherical refractory metal based powder pa

Details Process for producing spherical refractory metal based powder pa Process for producing spherical refractory metal based powder pa

1986-09-08

1988-11-08

Brody, Christopher W.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

264 15, 21912138, B22F 100

Patent

active

047832185

ABSTRACT:
A powdered material and a process for producing the material are disclosed. The powdered material consists essentially of refractory metal based spherical particles and is essentially free of elliptical shaped material and elongated particles having rounded ends. The process for making the spherical particles involves mechanically reducing the size of a starting material to produce a finer powder which is then entrained in a carrier gas and passed through a high temperature zone at a temperature above the melting point of the finer powder to melt at least about 50% by weight of the powder and form the spherical particles of the melted portion. The powder is then directly solidified.

REFERENCES:
patent: 3974245 (1976-08-01), Cheney et al.
patent: 4264354 (1981-04-01), Cheetham
patent: 4711660 (1987-12-01), Kemp, Jr.
patent: 4711661 (1987-12-01), Kemp, Jr.

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