Preparation method of electrical contact material
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United States of America Patent
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Oct 16, 2018
Grant Date -
Mar 17, 2016
app pub date -
Mar 21, 2013
filing date -
Aug 20, 2012
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Abstract
A preparation method of an electrical contact material includes steps of: adopting chemical plating to cover nickel coating on aquadag or metallic oxide, then covering with silver coating, and forming Ag—Ni—C or Ag—Ni—MeO core-shell structure, which improves interface wettability of aquadag, metallic oxide and silver matrix, and removes the adverse effect on the electrical contact material mechanical property due to bad interface wettability in conventional powder metallurgy method. What is important is that the silver in intermediate composite particles is replaced by nickel coating, thus reduce the silver use level. The main function of silver coating is to improve inoxidizability of composite particles, sintering granulation property and the deformability during the manufacturing process of intermediate composite particles, thus improve the technological property.
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