Environmental barrier coating with porous bond coat layer
US11821327B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Oct 10, 2022 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Oct 10, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T50/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A gas turbine engine article includes a silicon-containing ceramic substrate and an environmental barrier coating (EBC) system disposed on the substrate. The EBC system includes, from the substrate, a dense bond coat layer, a porous bond coat layer, and a topcoat layer in contact with the porous bond coat layer. The dense bond coat layer and the porous bond coat layer each include a silica matrix and oxygen-scavenging gas-evolution particles dispersed through the silica matrix. The porous bond coat layer includes engineered pores.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.