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Title:
COMPOSITE ELECTRICAL CONTACT MATERIAL
Document Type and Number:
Japanese Patent JPS5741338
Kind Code:
A
Abstract:

PURPOSE: To obtain a composite electrical contact material with superior contact performance and melt-sticking resistance by internally oxidizing an alloy prepared by adding a specified amount of Cd and Bi to Ag.

CONSTITUTION: An alloy prepared by adding 20W30W/O Cd and 0.01W2W/O Bi to Ag is melted and sprayed. The resulting fine grains are internally oxidized in an oxygen atmosphere at about 900°C under about 9 atm to obtain composite powder of Ag-CdO-Bi2O3. At this time, all of the Cd in the fine grains is oxidized by the effect of the added Bi. The composite powder is compressed and sintered, and the sintered body is extruded and drawn into a wire rod, which is then headed to manufacture a rivet type electrical contact. To Ag may be added 0.01W1W/O Ni besides Cd and Bi.


Inventors:
TSUJI HITOSHI
SHIODA SHIGEO
Application Number:
JP11732280A
Publication Date:
March 08, 1982
Filing Date:
August 26, 1980
Export Citation:
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Assignee:
TANAKA PRECIOUS METAL IND
International Classes:
C22C5/10; H01H1/02; H01H1/023; H01H11/04; (IPC1-7): C22C5/10; H01H1/02
Domestic Patent References:
JPS5330412A1978-03-22
JPS5382610A1978-07-21