Magnetically anisotropic hot-worked magnet and method of producing same
US5125990A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Jun 1, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/0441
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetically anisotropic hot-worked magnet made of an R-T-B alloy containing a transition metal T as a main component, a rare earth element R including yttrium, and boron B; the magnet having the fine crystal grains having an average grain size of 0.02 -1.0 .mu.m, and having a carbon content of 0.8 weight % or less and an oxygen content of 0.5 weight % or less. The angular variance of orientation of the crystal grains is within 30.degree. from the C axes of the crystal grains when measured by X-ray. This magnet can be produced by mixing the magnet flakes with an additive composed of at least one organic compound having a boiling point of 50.degree. C. or higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.