Intermetallic compound, method for producing the compound, and u

Details Intermetallic compound, method for producing the compound, and u Intermetallic compound, method for producing the compound, and u

1988-02-23

1990-03-27

Dean, R.

Metal treatment

Compositions

Heat treating

148 115P, 148 13, 148400, 148425, 148426, C22F 100

Patent

active

049117629

ABSTRACT:
Jewelry is produced employing alloys of Fe, Co, Ni, Pd, Pt, Au, as well as --in smaller quantities--Cu, in conjunction with Al, Ga, In, Si, these alloys displaying the feature of being crystallized in the cubic structure of the type B2 or C1, designations as used in structure reports. These alloys, which display very decorative colors not found with other metals, or anywhere else in nature, are--per se--very brittle and subject to spontaneous disintegration in reactive media. For this reason, these materials are very difficult to form and cannot be used for the intended purpose. Their properties can be decisively improved by impressing upon the alloys a grain size of less than 50 .mu.m by hot-forming or by sintering, for example, or by some other process, and by selecting the composition of the alloy with the intent to keep the quantity of the transition metal component A at a value not lower than stochiometric value. The jewelry items may consist of one of these alloys, fully or partially.

REFERENCES:
Zeits, Metallkunde 71, 1980, p. 577.

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