Ag-SnO-CdO electrical contact materials and manufacturing method

Details Ag-SnO-CdO electrical contact materials and manufacturing method Ag-SnO-CdO electrical contact materials and manufacturing method

1991-01-14

1992-04-07

Zimmerman, John

Metal treatment

Stock

Noble metal base

420506, C22C 506, H01H 102

Patent

active

051024802

ABSTRACT:
Novel Ag-SnO-CdO electrical contact materials are disclosed, which are made of ternary Ag alloys consisting of more than 5-12 weight % of Sn, 0.5-5 weight % of Cd, and a balance of Ag, the alloys having been prepared by melting and having been internal oxidized. Novel manufacturing methods are also disclosed, in which internal-oxidation is conducted in an oxygen atmosphere of more than 10 atm to 200 atm, at a temperature of 750.degree. C. to 500.degree. C., and at a condition that the alloys are kept at a solid phase not involving any liquid phase.

REFERENCES:
patent: 3607244 (1971-09-01), Kabayama
patent: 3799771 (1974-03-01), Harada
patent: 3933486 (1976-01-01), Shibata
patent: 4452652 (1984-06-01), Shibata
patent: 4514238 (1985-04-01), Shibata
patent: 4636270 (1987-01-01), Shibata
patent: 4647322 (1987-03-01), Shibata
patent: 4672008 (1987-06-01), Shibata
patent: 4981533 (1991-01-01), Yida

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