Process for producing mixed ultrafine powder of metals or cerami

Details Process for producing mixed ultrafine powder of metals or cerami Process for producing mixed ultrafine powder of metals or cerami

1985-10-04

1987-08-25

Lechert, Jr., Stephen J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05BA, 75 05BB, 264 5, 264 9, 264 10, C22C 104

Patent

active

046890750

ABSTRACT:
A process for producing a mixed ultrafine powder, which comprises reacting at least two metals or ceramics in the molten state with hydrogen, nitrogen, oxygen, a mixture of hydrogen and nitrogen or a mixture of nitrogen and oxygen. Each said gas or gaseous mixture being activated with a hot plasma, in an atmosphere of hydrogen gas, nitrogen gas, oxygen gas, a gaseous mixture of hydrogen and nitrogen, a gaseous mixture of nitrogen and oxygen, or a gaseous mixture of any of said gases with an inert gas under a pressure of 50 torr to 3 atmospheres to form ultrafine particles of said at least two metals or ceramics afloat in the atmospheric gas, and thereafter mixing the floating ultrafine particles of the metals or ceramics by a gas current.

REFERENCES:
patent: 3992193 (1976-11-01), Fey et al.
patent: 4266977 (1981-05-01), Steiger
patent: 4282195 (1981-08-01), Hoekje
patent: 4482134 (1984-11-01), Uda et al.
patent: 4518425 (1985-05-01), Wynnyckyj
patent: 4526612 (1985-07-01), Eriksson et al.

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