R-T-B based sintered magnet
US9514869B2 · kind B2 · utility
1Cited by
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19Claims
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Key dates
| Filing date | Feb 13, 2013 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Apr 24, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F3/10
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides an R-T-B based sintered magnet including R2T14B crystal grains wherein; a grain boundary is formed by two or more adjacent R2T14B crystal grains, an R—O—C concentrated part, in which concentrations of R, O and C are higher than those in the R2T14B crystal grains respectively, is in the grain boundary, and an area of the R—O—C concentrated part occupying in that of the grain boundary on a cut surface of the R-T-B based sintered magnet is within a range of 10% or more to 75% or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.