Rare earth-iron magnet
US4863805A · kind A · utility
10Cited by
10References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 1987 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Jun 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12097
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rare earth-iron permanent magnet is comprised of compacted Re-B-R type alloy particles in which R represents at least one element selected from rare earth elements and yttrium. The magnet has a sealing agent filling voids between the compacted Fe-B-R type alloy particles and a coating layer formed on outer surfaces thereof. The coating layer is formed by coating the surfaces wrought in a desired magnet shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.