Method for preparing Ag-SnO system alloy electrical contact mate

Details Method for preparing Ag-SnO system alloy electrical contact mate Method for preparing Ag-SnO system alloy electrical contact mate

1986-02-28

1987-07-14

Lechert, Jr., Stephen J.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Metal and nonmetal in final product

75235, 419 26, 419 29, 419 46, 419 54, 419 55, 419 57, 200265, 200266, C21D 100

Patent

active

046801626

ABSTRACT:
Ag-SnO system alloy electrical contact materials. The Ag alloy before internal oxidation thereof contains Sn of an amount of 5-20 weight %, 0.5-15 weight % of which amount is in the powder form of SnO.sub.2. The existence of SnO.sub.2 particles in the alloy accelerates the internal oxidation speed, allowing oxygen to readily pass aside and between the particles, while the internal oxidation per se makes the alloy more dense by eliminating spaces between SnO.sub.2 grain particles on account of the volumeric expansion of Sn which results from the internal oxidation thereof.

REFERENCES:
patent: 2486341 (1949-10-01), Stumbock
patent: 4095977 (1978-06-01), Brugner
patent: 4141727 (1979-02-01), Shida et al.
patent: 4243413 (1981-06-01), Shibata
patent: 4315777 (1982-02-01), Nadkarni et al.
patent: 4341556 (1982-07-01), Bohm et al.
patent: 4551301 (1985-11-01), Schreiner
patent: 4609525 (1986-09-01), Schreiner et al.

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