Method of applying a thermal barrier coating to a metallic article and a thermal barrier coated metallic article
US9963774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2015 |
| Grant date | May 8, 2018 |
| Priority date | — |
| Expiry date | Dec 20, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2300/2118
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A thermal barrier coated metallic article includes a platinum-group metal enriched outer layer on the article. The surface of the outer layer has a microstructure including a plurality of projections extending away from the metallic article. A thin adherent layer of oxide is formed on the outer layer of the metallic article. A ceramic coating is provided on the oxide layer on the surface on and around the projections. The ceramic coating includes a plurality of columnar ceramic grains which extend through the full thickness of the ceramic coating. The grains are arranged in clusters separated by gaps. The grains deposited around the projections are generally blocked. The projections reduce the stress in the ceramic coating near the interface with the adherent layer of oxide and also reduce the stress in the adherent layer of oxide and hence increase the working life of the thermal barrier coating system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.