Method for producing a contact material for contact pieces for vacuum switch devices, and a contact material and contact pieces therefor
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United States of America Patent
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Feb 25, 2003
Grant Date -
Nov 1, 2001
app pub date -
Mar 2, 2001
filing date -
Mar 4, 2000
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Abstract
A method for producing a contact material made of copper and chromium in a proportion of 40 to 75 wt.-% copper and 25 to 60 wt.-% of chromium for contact pieces for vacuum switch devices by pressing the powder mixture, sintering and infiltrating the compact and subsequent reshaping into a semi-finished contact material product having a density which corresponds to at least 99% of the theoretical density, as well as to contact pieces made of this semi-finished contact material product.
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