Processing of NdFeB magnetic material
US11915844B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Aug 25, 2017 |
| Grant date | Feb 27, 2024 |
| Priority date | — |
| Expiry date | Aug 25, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of processing NdFeB magnetic powder comprises: providing a source of hydrogenated NdFeB powder (101, 102, 103); feeding said powder into an inlet of a cyclone separator (104); separating the powder into an overflow enriched in Nd-rich grain boundary phase and an underflow enriched in NdxFeyBHz matrix phase particles (106); optionally feeding the underflow back into the inlet of the cyclone separator whereby to further enrich the underflow in the NdxFeyBHz matrix phase particles (108a); and collecting the underflow (108).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.