Low-cost double-main-phase Ce permanent magnet alloy and its preparation method
US9892832B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Feb 13, 2018 |
| Priority date | — |
| Expiry date | Oct 11, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/0266
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention discloses a low-cost double-main-phase Ce permanent magnet alloy and its preparation method, and belongs to technical field of rare earth permanent magnet material. The Ce permanent magnet alloy has a chemical formula of (Cex,Re1-x)aFe100-a-b-cBbTMc in mass percent, wherein 0.4≦x≦0.8, 29≦a≦33, 0.8≦b≦1.5, 0.5≦c≦2, Re is one or more selected from Nd, Pr, Dy, Tb and Ho elements, and TM is one or more selected from Ga, Co, Cu, Nb and Al elements; the Ce permanent magnet alloy has a double-main-phase structure with a low HA phase in (Ce,Re)—Fe—B and a high HA phase in Nd—Fe—B. The double-main-phase Ce permanent magnet alloy of the present invention prepared by using a double-main-phase alloy method greatly lowers the production cost of magnet while maintaining excellent magnetic performances.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.