Samarium-iron-nitrogen magnet powder and method for manufacturing same
US11361888B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | May 29, 2018 |
| Grant date | Jun 14, 2022 |
| Priority date | — |
| Expiry date | Sep 9, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
One embodiment of the present invention is that in samarium-iron-nitrogen magnet powder, a non-magnetic phase is formed on a surface of the samarium-iron-nitrogen magnet phase, and an arithmetic mean roughness Ra of the surface is 3.5 nm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.