Method of preparing a bulk amorphous metal article
AssigneeAllied-Signal Inc.
InventorBenjamin P. Dolgin
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Abstract
This invention deals with a method of producing a bulk amorphous metal alloy article. The method involves mechanically alloying an amorphous matrix material and a crystalline element which is a fast diffuser in the matrix material to give a powder mixture which is at least 50% but less than 100% amorphous. This powder mixture is then formed into a bulk amorphous metal alloy article by ordinary forming methods such as hot-pressing. The resultant bulk amorphous metal alloy article can be heated above its glass transition temperature to provide a bulk crystalline metal alloy article.
Claims11
A method for producing a bulk amorphous metal alloy article comprising:
- (a) mechanically alloying an amorphous matrix material, said material containing at least one metal, and at least one crystalline element which is a fast diffuser in the amorphous matrix material to give a powder mixture which is at least 50% but less than 100% amorphous;
- and
- (b) forming the powder mixture into a bulk amorphous metal alloy article, having a density of at least 80% of its theoretical density, at a pressure greater than 5,000 atmospheres and a temperature from about 25.degree. C. to below the glass transition temperature of the powder mixture, and recovering the bulk amorphous metal alloy article.
Dependencies are inferred from the claim text.