Method for producing sintered rare-earth magnet, sintered rare-earth magnet, and material for same
US9640305B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Nov 18, 2010 |
| Grant date | May 2, 2017 |
| Priority date | — |
| Expiry date | May 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for producing a sintered rare-earth magnet characterized by sintering a raw material that includes a ribbon-shaped polycrystalline phase with an average grain size of 10 to 200 nm fabricated by rapid solidification of an alloy melt having a rare-earth magnet composition, and a low-melting point phase formed on the surface of the polycrystalline phase and having a melting point lower than the polycrystalline phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.