Process for producing magnets having improved corrosion resistance
US4837114A · kind A · utility
44Cited by
2References
45Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1986 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Jan 13, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0577
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Fe-B-R type permanent magnet is produced by: forming an anticorrosive coating film layer on a Fe-B-R base permanent magnet material body by means of vapor deposition to thereby improve the corrosion resistance thereof. The anticorrosive thin film is formed of metal, oxides, nitrides, carbides, borides, silicides, composite compositions thereof, or a mixture thereof. Additionally blasting, shot peening, heat treatment for forming an interdiffusion layer, and/or resin impregnation may be applied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.