Turbine blade tip and shroud clearance control coating system
US7510370B2 · kind B2 · utility
35Cited by
21References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2005 |
| Grant date | Mar 31, 2009 |
| Priority date | — |
| Expiry date | Jan 29, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2300/2118
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A turbine blade tip and shroud clearance control coating system comprising an abrasive blade tip coating and an abradable shroud coating are provided. The abrasive layer may comprise abrasive particles of cubic zirconia, cubic hafnia or mixtures thereof, and the abradable layer may be a nanolaminate thermal barrier coating that is softer than the abrasive layer. The invention further provides an alternate coating system comprising an abradable blade tip coating and an abrasive shroud coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.