Rare earth-cobalt permanent magnet
US10497496B2 · kind B2 · utility
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Key dates
| Filing date | Sep 4, 2015 |
| Grant date | Dec 3, 2019 |
| Priority date | — |
| Expiry date | Mar 31, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/0441
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
There is provided a rare earth-cobalt permanent magnet containing 23 to 27 wt % R, 3.5 to 5 wt % Cu, 18 to 25 wt % Fe, 1.5 to 3 wt % Zr, and a remainder Co with inevitable impurities, where an element R is a rare earth element at least containing Sm. It has a metal structure including a cell phase (11) containing Sm2Co17 phase and a cell wall (12) surrounding the cell phase (11) and containing SmCo5 phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.