Corrosion resistant rare earth magnet and its preparation
US6777097B2 · kind B2 · utility
4Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2002 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Jul 21, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31663
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
On a surface of a rare earth permanent magnet R—T—M—B wherein R is a rare earth element, T is Fe or Fe and Co, M is Ti, Nb, Al, V, Mn, Sn, Ca, Mg, Pb, Sb, Zn, Si, Zr, Cr, Ni, Cu, Ga, Mo, W or Ta, 5 wt %≦R≦40 wt %, 50 wt %≦90 wt %, 0 wt %≦M≦8 wt %, and 0.2 wt %≦B≦8 wt %, a solution comprising a flake fine powder of Al, Mg, Ca, Zn, Si, Mn or an alloy thereof and a silicone resin is applied and baked to form an adherent composite coating, thereby providing a corrosion resistant rare earth permanent magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.