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US 4,361,033 AGranted
Method for selecting an additive for electrical contacts
AssigneeGTE Laboratories Incorporated
InventorsHan J. Kim, Thomas E. Peters, John Gustafson
Life of this patent
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Abstract
An additive for an electrical contact is selected according to a method wherein the additive has a substantially smaller contact angle with a liquid phase of a ductile metal than the weld inhibiting material has with the liquid phase.
Claims4
A method for selecting a suitable additive for electrical contacts of the type comprising a ductile metal or ductile metal alloy having relatively high electrical and thermal conductivity and a sufficient amount of a weld inhibiting material to impart weld inhibiting qualities to the working surface of the contact comprising:
- forming a sintered compact of the proposed additive;
- liquifying said ductile metal or ductile metal alloy on the surface of said sintered compact;
- measuring the contact angle formed between the liquid phase of said ductile metal or ductile metal alloy and the surface of said sintered compact;
- selecting as an additive the proposed additive having a substantially smaller contact angle with said liquid phase than the contact angle that said weld inhibiting material has with said liquid phase.
1 more element
Dependencies are inferred from the claim text.