Permanent magnetic material and permanent magnet
US6183571A · kind A · utility
14Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1995 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Sep 29, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0578
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
With the object of improving magnetic properties by remaining amorphous phase of a quenched R--Fe--B permanent magnet, in a quenched permanent magnetic material comprising Fe as a major component, at least one lanthanoid element, R, and boron, the permanent magnetic material comprises 10 percent by area or less of a soft magnetic remaining amorphous phase, and the balance being a crystalline phase substantially formed by heat treatment and containing R--Fe--B hard magnetic compound. A bulk magnet is made of the permanent magnetic material by plastic forming.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.