High-density high-conductivity electrical contact material for vacuum interrupters and method of manufacture
US4190753A · kind A · utility
16Cited by
5References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 13, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Apr 13, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1216
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A vacuum interrupter contact is formed of copper and chromium which exhibits high electrical conductivity and a high density of greater than about 95% of the theoretical density of the materials. The copper is the predominant constituent, and a mixture of copper and chromium powder is cold-pressed to form a compact which is then vacuum-sintered at a temperature below the melting point of the copper to achieve the desired high density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.