Method of making electrical contacts
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United States of America Patent
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May 22, 1984
Grant Date -
N/A
app pub date -
Jan 4, 1982
filing date -
Jan 4, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of preparing electrical contacts and electrical contact materials comprises the steps of blending a conductive metallic component, such as silver, with nickel and zirconium diboride which is substantially completely free of oxides, pressing the powder mixture to form a pre-sintered compact, and thereafter liquid phase sintering the compact to a densified body. The zirconium diboride is mixed with about 2 weight percent of a reducing agent, preferably mixed carbon and boron powders, and heated to remove oxides from the surface of the zirconium diboride powder particles prior to the steps of pressing and sintering.
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