Ultrafine particles of amorphous metal and method for production

Details Ultrafine particles of amorphous metal and method for production Ultrafine particles of amorphous metal and method for production

1994-09-28

1996-11-26

Wyszomierski, George

Specialized metallurgical processes, compositions for use therei

Processes

Producing solid particulate free metal directly from liquid...

75346, 75 1019, 75 1022, B22F 914

Patent

active

055781080

ABSTRACT:
Ultrafine amorphous metal particles which combine the properties of ultrafine particles with those of an amorphous alloy and a method for the production thereof are disclosed. The ultrafine amorphous metal particles are produced by a method which comprises discharging a plasma arc against a raw metal capable of forming a carbide in a reaction gas using an inert gas as a main component thereof and containing a hydrocarbon gas, and allowing the metal which has been consequently vaporized to contact the reaction gas which has been consequently converted into a plasma, thereby inducing formation of a solid solution of carbon atoms in the vaporized metal and quenching the solid solution in the reaction gas to confer an amorphous structure thereon. As the raw metal, at least one metal selected from the group consisting of Fe, Mo, Nb, Ta, Ti, Zr, Al, Si, and Cr is preferably used. By this method are obtained ultrafine amorphous metal particles which comprise the metal mentioned above, possess at least 50% by volume of an amorphous phase, and have particle diameters of not more than 500 nm.

REFERENCES:
patent: 3279912 (1966-10-01), Death et al.
patent: 4812166 (1989-03-01), Saiki et al.
patent: 5460701 (1995-10-01), Parker et al.

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