Yittrium granular powder for thermal spray and thermal spray coating produced using the same
US11312637B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 18, 2021 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Aug 18, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/61
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Proposed is an yttrium-based granular powder for thermal spraying. The yttrium-based granular powder includes at least one yttrium compound powder selected from the group consisting of Y2O3, YOF, YF3, Y4Al2O9, Y3Al5O12, and YAlO3, and a silica (SiO2) powder. The yttrium-based granular powder is prepared by mixing the yttrium compound powder having a mean grain diameter of 50 nm to 900 nm and the silica powder having a mean grain diameter of 50 nm to 900 nm. The yttrium-based granular powder includes less than 10 wt % of a Y—Si—O mesophase. A thermal spray coating produced using the yttrium-based granular powder can exhibit low porosity, high density, and excellent plasma resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.