Method for preparing anisotropic flake nanocrystalline rare earth permanent magnet material and rare earth permanent magnet material
US12278044B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2023 |
| Grant date | Apr 15, 2025 |
| Priority date | — |
| Expiry date | Nov 24, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed are a method for preparing an anisotropic flake nanocrystalline rare earth permanent magnet material and a rare earth permanent magnet material. In the disclosure, the method includes: step 1, preparation of a precursor flake nanocrystal magnetic powder, where a number of grains of flake nanocrystals inside the precursor flake nanocrystalline magnetic powder accounts for not less than 85% of a total number of grains inside the precursor flake nanocrystalline magnetic powder; step 2, orientation treatment by hot deformation: subjecting the precursor flake nanocrystalline magnetic powder or a green body prepared from the precursor flake nanocrystalline magnetic powder to the hot deformation, such that flake nanocrystals are regularly arranged; and step 3, post-processing for optimizing orientation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.