Coating system utilizing an oxide diffusion barrier for improved performance and repair capability
US6455167B1 · kind B1 · utility
39Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Jul 2, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C28/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A coating is described for use on a superalloy substrate comprising a diffusion barrier as an intermediate layer overlying the substrate and underlying a protective coating having a high aluminum content. The diffusion barrier layer is characterized by having low interdiffusivity for elements from the substrate and the coating, a minimal impact on the mechanical properties of the article which is coated, and can be achieved readily using existing coating application techniques or post heat treat processes. The diffusion barrier layer is preferably an oxide ceramic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.