Method of producing a rare earth bond magnet
US5435859A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1993 |
| Grant date | Jul 25, 1995 |
| Priority date | — |
| Expiry date | Aug 4, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0578
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of producing a rare earth anisotropic bond magnet comprising the steps of: PA0 melting an aloy composed of 10-30 atom % of R (wherein R designates at least one rare earth element including yttrium), 2-28 atom % of boron and 65-82 atom % of M (wherein M designates at least one of iron, cobalt and nickel) and rapidly cooling the melted alloy to produce powder material, PA0 subjecting the material to stamping at the temperature of 300.degree.-900.degree. C. in an inert gas atmosphere to pulverize and press the material to a scaly shape and PA0 cooling the pulverized material so that a magnetic anisotropy is produced in the vertical direction relative to the pressed surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.