Process for producing magnetic materials
US4601875A · kind A · utility
82Cited by
5References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1983 |
| Grant date | Jul 22, 1986 |
| Priority date | — |
| Expiry date | Sep 15, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49076
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Permanent magnetic materials of the Fe-B-R type are produced by: PA0 preparing an metallic powder having a mean particle size of 0.3-80 microns and a composition of, by atomic percent, 8-30% R (rare earth elements), 2-28% B, and the balance Fe, compacting, sintering at a temperature of 900-1200 degrees C., and aging at a temperature ranging from 350 degrees C. to the temperature for sintering. Co and additional elements M (Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr, Hf) may be present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.