Thermal barrier coating systems and processes therefor
US9023486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2011 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Aug 25, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2495
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Coating systems and processes by which the coating systems can be deposited to be resistant to contaminants, and particularly resistant to infiltration and damage caused by CMAS. The coating systems include inner and outer ceramic layers, each having a microstructure characterized by splats and horizontal porosity. The inner ceramic layer consists essentially of zirconia stabilized by about 6 to about 9 weight percent yttria. The outer ceramic layer overlies and contacts the inner ceramic layer to define the outermost surface of the coating system. The outer ceramic layer consists essentially of zirconia stabilized by about 25 to about 75 weight percent yttria, has a thickness that is less than the thickness of the inner ceramic layer, and has a porosity level that is lower than that of the inner ceramic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.