Telluride containing impregnated electric contact material
US3985512A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1973 |
| Grant date | Oct 12, 1976 |
| Priority date | — |
| Expiry date | Oct 18, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12167
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Electric contact material having good solderability, consists of a porous matrix of sintered powder particles of a refractory metal, such as tungsten or molybdenum, with its pores impregnated with a metal alloy consisting of a telluride-forming metal, such as copper, silver or lead, and a sufficient amount of a telluride of such metal to form a brittle deposit of tellurium and the telluride-forming metal, both in elemental form, on the material's surface, apparently produced by decomposition and vaporization of the telluride due to electrical arcing, and which vapor after the arcing and rapid cooling of the material, condenses on the material's surface to form the deposit. This brittle deposit provides an effective reduction in the contact welding force of the material as compared to prior art electric contact materials of good solderability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.