Rare earth magnet having excellent corrosion resistance
US5167914A · kind A · utility
12Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | May 22, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0572
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An (Fe, Co)-B-R tetragonal type magnet having a high corrosion resistance, which has a boundary phase stabilized by Co and Al against corrosion, and which consists essentially of: PA1 0.2-3.0 at % Dy and 12-17 at % of the sum of Nd and Dy; PA1 5-10 at % B; PA1 0.5-13 at % Co; PA1 0.5-4 at % Al; and PA1 the balance being at least 65 at % Fe. PA1 0.1-1.0 at % of Ti and/or Nb may be present. Alloy powders therefor can be also stabilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.