Rare earth element sintered magnet and method for producing rare earth element sintered magnet
US7438768B2 · kind B2 · utility
9Cited by
11References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2002 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Aug 22, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/026
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Hydrogen embrittlement is prevented in Sm2Co17-based magnets and R2Fe14B-based magnets by metal plating the magnet, then carrying out heat treatment, or by forming a metal oxide or metal nitride layer on the metal plating layer or directly on the magnet itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.