Process for producing a thermal barrier in a multilayer system for protecting a metal part and part equipped with such a protective system
US10161262B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 7, 2012 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Nov 16, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12549
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for producing a thermal barrier in a multilayered system for protecting a metal part made of superalloy, by producing a thermal treatment by flash sintering protection materials in layers superposed on the metal part in an SPS machine enclosure. The layers contain, on a superalloy substrate, at least two layers of zirconium-based refractory ceramics. A metal part is produced according to a SPS flash sintering method and contains a superalloy substrate, a metal sub-layer, a TGO oxide layer and the thermal barrier formed by the method. A first ceramic is an inner ceramic designed to have a substantially higher expansion coefficient. An outer ceramic is designed to have at least lower thermal conductivity, and at least one of a sintering temperature or maximum operating temperature that is substantially higher. The thermal barrier has a composition and porosity gradient from the metal sub-layer to the outer ceramic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.