Internally oxidized Ag-Sn-Bi alloy electrical contact materials
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United States of America Patent
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Apr 30, 1985
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N/A
app pub date -
Oct 29, 1984
filing date -
Feb 12, 1981
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Abstract
Internally oxidized Ag-Sn-Bi alloy electrical contact materials. The alloy contains a larger amount of Bi, viz., more than 2 weight percent of bismuth, whereby the Bi which can not be a solid solution with Ag and Sn and hence precipitates as a numerous number of defects in an Ag matrix, does not allow said Ag matrix to form crystalline grains, but accelerates oxidation velocity and has solute metals oxidized extremely in minute and uniform up to inner cores of alloy mass.
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