Cermet composites, process for producing them and arc tube incorporating them
US4602956A · kind A · utility
48Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1984 |
| Grant date | Jul 29, 1986 |
| Priority date | — |
| Expiry date | Dec 17, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12743
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Composite cermets having a central core of a first cermet composition and one or more surrounding layers of different cermet compositions are formed by a multi-step pressing operation, followed by sintering. A tungsten/alumina or molybdenum/alumina composite cermet is useful as an end closure for alumina arc tubes of metal halide discharge lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.