Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1988-12-16
1990-01-09
Rutledge, L. Dewayne
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 05BA, 75 05BB, 75 05BC, B22F 900
Patent
active
048925799
ABSTRACT:
A process for preparing a substantially amorphous metal alloy body from substantially crystalline mixed elemental metal powders is disclosed. The process for producing the mixed elemental metal powders comprises the step of (1) entraining vapors of at least a first metal and a second metal, the two metals having a negative heat of mixing when combined, in separate heated inert gas streams; (2) cooling each inert gas stream adiabatically by passing it through a nozzle, to produce elemental metal powder aerosols; (3) mixing the inert gas streams to produce mixed elemental metal powder aerosols; and (4) collecting the mixed elemental metal powder aerosols to form mixed elemental powders. The powders can then be compacted to form a compacted body and the compacted body thermally reacted under reaction conditions sufficient to form the substantially amorphous metal alloy body. The processes to make the powders and the substantially amorphous metal alloy body can be done using elemental and/or appropriately selected combined-state metals as starting materials.
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Rutledge L. Dewayne
Schumaker David
Sutherland Barbara J.
The Dow Chemical Company
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