Magnetically anisotropic hotworked magnet and method of producing same
US4952251A · kind A · utility
2Cited by
1References
6Claims
0Family size
Assignee
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Key dates
| Filing date | May 23, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | May 23, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Anisotropic hot-worked permanent magnets are made from an R-T-B alloyed powder to which is added a combination internal lubricant including a carbon-based material such as graphite and a glass material such as glass from the B.sub.2 O.sub.3 -SiO.sub.2 BiO.sub.3 glass system. The internal lubricant provides improved formability during the hot-working step, such as die-upsetting, and provides finished magnet products wherein the individual grains are more uniformly plastically deformed throughout the product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.