Magnetically anisotropic bond magnet, magnetic powder for the magnet and manufacturing method of the powder
US5085715A · kind A · utility
9Cited by
4References
16Claims
0Family size
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Key dates
| Filing date | Dec 4, 1989 |
| Grant date | Feb 4, 1992 |
| Priority date | — |
| Expiry date | Dec 4, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0578
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for producing magnetically anisotropic powder having "flattened" crystal grains of an R-TM-B-M system alloy with preferably (c)/(a) greater than 2, where (c) is the grain size perpendicular to the C-axis and (a) the grain size parallel to the C-axis, includes the steps of plastically deforming a green compact of flakes formed by rapidly-quenching the alloy melt, and then crushing the plastically deformed body. In the alloy system, R is at least one of the rare earth elements including Y, TM is Fe or Fe a part of which has been substituted with Co, B is boron, and M is an additive selected from Si, Al, Nb, Zr, P and C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.