Coated filaments
US5571561A · kind A · utility
4Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1993 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Oct 19, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C16/32
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A ceramic filament comprising a tungsten core and an outer layer of silicon carbide, the tungsten core and the outer layer being separated by an intermediate layer of titanium carbide. Also claimed is a process for the deposition of a titanium carbide coating on a tungsten filament which comprises heating the filament and passing the heated filament through a deposition chamber containing gases which on contact with the hot filament deposit the coating, the gases comprising a hydrocarbon and a titanium halogenated compound, said titanium halogenated compound contacting the tungsten filament before the hydrocarbon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.