Claims
- 1. A method of making internal oxidized Ag-SnO system alloy electrical contact materials which comprises preparing an Ag alloy layer having a thickness at least twice as thick as a desired thickness, wherein said alloy comprises 0.5-12 weight % of Sn, and a metal selected from the group consisting of In in a 0.5-15 weight percent and Bi in a 0.01 to less than 1.5 weight percent,
- sandwiching said alloy layer between pure thin silver layers,
- completely internally oxidizing said alloy layer to form a depleted layer which lies centrally and transversely to the axis or to the height of said alloy layer, and
- cutting said alloy layer along said depleted layer thereby removing said depleted layer.
- 2. A process according to claim 1, wherein said alloy comprises 0.01 to less than 1.5 weight % of Bi and further comprises at least one metal selected from the group consisting of 0.1-5 weight % of Cd, 0.1-2 weight percent of Zn, 0.1-2 weight % of Sb, 0.01-2 weight % of Pb and 0.1 to less than 2 weight % of In.
- 3. A process according to claim 1, wherein said alloy comprises 0.5-15 weight % of In and further comprises at least one metal selected from the group consisting of 0.1-5 weight % of Cd, 0.1-2 weight % of Zn, 0.1-2 weight % of Sb and 0.01-2 weight % of Pb.
- 4. The method as claimed in claim 1, in which the alloy is slitted to desired configurations after the internal oxidation.
- 5. The method as claimed in claim 1, in which the alloy is pressed or cut out to desired configurations before the internal oxidation.
Parent Case Info
This application is a division of my pending U.S. patent application Ser. No. 771,341 filed Aug. 30, 1985 now U.S. Pat. No. 4647322 for Internal Oxidized Ag-SnO Sytem Alloy Contact Materials, And Manufacturing Method Thereof.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
2899345 |
Oshry |
Aug 1959 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
771341 |
Aug 1985 |
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