Rare earth magnet and its preparation
US9044810B2 · kind B2 · utility
6Cited by
8References
5Claims
0Family size
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Key dates
| Filing date | Jun 29, 2010 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Jun 29, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A rare earth magnet is prepared by disposing a R1-T-B sintered body comprising a R12T14B compound as a major phase in contact with an R2-M alloy powder and effecting heat treatment for causing R2 element to diffuse into the sintered body. The alloy powder is obtained by quenching a melt containing R2 and M. R1 and R2 are rare earth elements, T is Fe and/or Co, M is selected from B, C, P, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, Hf, Ta, W, Pt, Au, Pb, and Bi.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.