Environmental barrier for a substrate comprising free silicon
US12312282B2 · kind B2 · utility
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Key dates
| Filing date | Jun 30, 2022 |
| Grant date | May 27, 2025 |
| Priority date | — |
| Expiry date | Jun 30, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2300/611
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A part includes a substrate of ceramic matrix composite material, the substrate including silicon, the part further including an environmental barrier formed on at least one surface of the substrate, wherein the environmental barrier includes at least one compound selected from Yb2-2γGd2γSiO5 and Yb2-2γGd2γSi2O7, where γ is between 0.05 and 0.15, and wherein the environmental barrier further includes alumina Al2O3, the molar alumina content being between 5% and 15% of the total environmental barrier composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.