Thermal/environmental barrier coating for silicon-containing materials
US6444335B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Apr 6, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D5/288
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A coating system for Si-containing material, such as those used to form articles exposed to high temperatures, including the hostile thermal environment of a gas turbine engine. The coating system is a compositionally-graded thermal/environmental barrier coating (T/EBC) system that exhibits improved mechanical integrity for high application temperatures that necessitate thick protective coatings. The T/EBC system includes an intermediate layer containing YSZ and BSAS, mullite and/or alumina, which is preferably used in combination with a mullite-containing layer that overlies the surface of the Si-containing material, a layer of BSAS between the mullite-containing layer and the intermediate layer, and a thermal-insulating top coat of YSZ overlying the intermediate layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.