Internal-oxidation method of electrical contact materials and th

Details Internal-oxidation method of electrical contact materials and th Internal-oxidation method of electrical contact materials and th

1990-02-05

1991-01-01

Morris, Theodore

Metal treatment

Stock

Noble metal base

420501, C22C 506

Patent

active

049815334

ABSTRACT:
Electrical contact materials are made by the internal-oxidation of Ag alloys containing more than 5 weight % of Sn, with the assistance of Pb or Zr contained at an amount as minimum as possible. Complete and uniform internal-oxidation of said Sn contents are obtained primarily on account of the internal oxidation conducted at an elevated oxygen atmospheric pressure, that is, 10 to 150 atm.

REFERENCES:
patent: 4243413 (1981-01-01), Shibata
patent: 4672008 (1987-06-01), Shibata

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