Method of applying a cerium diffusion coating to a metallic alloy
US7553517B1 · kind B1 · utility
9Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2005 |
| Grant date | Jun 30, 2009 |
| Priority date | — |
| Expiry date | Aug 2, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C10/30
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of applying a cerium diffusion coating to a preferred nickel base alloy substrate has been discovered. A cerium oxide paste containing a halide activator is applied to the polished substrate and then dried. The workpiece is heated in a non-oxidizing atmosphere to diffuse cerium into the substrate. After cooling, any remaining cerium oxide is removed. The resulting cerium diffusion coating on the nickel base substrate demonstrates improved resistance to oxidation. Cerium coated alloys are particularly useful as components in a solid oxide fuel cell (SOFC).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.