Part comprising a substrate and an environmental barrier
US11505508B2 · kind B2 · utility
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Key dates
| Filing date | Dec 29, 2017 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Oct 13, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2300/15
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A part includes a substrate having, adjacent to a surface of the substrate, at least a portion that is made of a material that contains silicon, and an environmental barrier formed on the surface of the substrate, the environmental barrier including a first layer including at least one first rare earth silicate and presenting grains with a mean size less than or equal to 1 μm; and a second layer covering the first layer, the second layer including at least one rare earth silicate and presenting grains with a mean size greater than 1 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.