Electrical contact compositions and novel manufacturing method

Details Electrical contact compositions and novel manufacturing method Electrical contact compositions and novel manufacturing method

1996-08-08

1998-10-27

Jordan, Charles T.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

419 27, 419 38, 419 47, 419 58, B22F 312, B22F 326

Patent

active

058289410

ABSTRACT:
A new class of low chop contact materials based on Ag-chromium carbide and Ag--Cr compositions have an essentially 100% dense, porosity free microstructure. These materials combine the advantageous properties of Ag--WC and Cu--Cr contacts without their disadvantages. A method of making this new class of low chop contact materials includes the steps of cold pressing a mixture of Ag and chromium or chromium carbide to form an unsintered blank and the elevated temperature infiltration of silver into the unsintered blank to obtain an essentially 100% dense, porosity free microstructure.

REFERENCES:
patent: 3360348 (1967-12-01), Schreiner
patent: 4032301 (1977-06-01), Hassler et al.
patent: 4204863 (1980-05-01), Schreiner
patent: 4457780 (1984-07-01), Osada et al.
ASM Handbook (ASMH), vol. 7. Powder Metallurgy, 1984, pp. 551-561, 630-634.

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