Rare earth sintered magnet and making method
US10074477B2 · kind B2 · utility
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Key dates
| Filing date | Dec 12, 2016 |
| Grant date | Sep 11, 2018 |
| Priority date | — |
| Expiry date | Dec 12, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/058
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A rare earth sintered magnet is an anisotropic sintered body comprising Nd2Fe14 B crystal phase as primary phase and having the composition R1aTbMcSidBe wherein R1 is a rare earth element inclusive of Sc and Y, T is Fe and/or Co, M is Al, Cu, Zn, In, P, S, Ti, V, Cr, Mn, Ni, Ga, Ge, Zr, Nb, Mo, Pd, Ag, Cd, Sn, Sb, Hf, Ta, or W, “a” to “e” are 12≤a≤17, 0≤c≤10, 0.3≤d≤7, 5≤e≤10, and the balance of b, wherein Dy and/or Tb is diffused into the sintered body from its surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.