Method for preparing neodymium-iron-boron permanent magnetic material
US11305345B2 · kind B2 · utility
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Key dates
| Filing date | Dec 21, 2017 |
| Grant date | Apr 19, 2022 |
| Priority date | — |
| Expiry date | Jan 22, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for preparing a NdFeB permanent magnetic material may include providing a covered NdFeB magnetic powder by depositing heavy rare earth particles or high-melting particles onto a NdFeB magnetic powder by physical vapor deposition; and performing orientation molding and sintering on the covered NdFeB magnetic powder to provide the NdFeB permanent magnetic material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.