Process for forming thermal barrier coating resistant to infiltration
US7807231B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Jan 22, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2230/40
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for protecting a thermal barrier coating (TBC) on a component used in a high-temperature environment, such as the hot section of a gas turbine engine. The process applies a protective film on the surface of the TBC to resist infiltration of contaminants such as CMAS that can melt and infiltrate the TBC to cause spallation. The process generally entails applying to the TBC surface a metal composition containing at least one metal whose oxide resists infiltration of CMAS into the TBC. The metal composition is applied so as to form a metal film on the TBC surface and optionally to infiltrate porosity within the TBC beneath its surface. The metal composition is then converted to form an oxide film, with at least a portion of the oxide film forming a surface deposit on the TBC surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.