Internal-oxidation method of electrical contact materials and the materials produced thereby
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United States of America Patent
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Jan 1, 1991
Grant Date -
N/A
app pub date -
Feb 5, 1990
filing date -
Feb 5, 1990
priority date (Note) -
Expired
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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.
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