Seal system
US7445854B2 · kind B2 · utility
0Cited by
15References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2004 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Aug 9, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
It is disclosed a method of deposting a seal coating and a seal system comprising at least two layers on the surface of an article. The upper or surface layer has a higher chromium activity than a bottom layer to reduce a diffusion of cobalt and the formation of cobalt oxide is reduced. The coating of invention may be heat-treated to reduce or optimize the formation of cobalt oxide to sustin the wear property.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.