Impact of RE-rich phases on magnetic properties in RE–Fe–B-sintered magnets by Tb diffusion
We investigated the effect of Tb grain boundary diffusion on the structural transformation and magnetic properties across operational temperature ranges. Through micro-structural characterization, Fm[Formula: see text]m-type and Ia[Formula: see text]-type RE-rich phases were observed, and their effe...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2025-08-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/21663831.2025.2521050 |
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| Summary: | We investigated the effect of Tb grain boundary diffusion on the structural transformation and magnetic properties across operational temperature ranges. Through micro-structural characterization, Fm[Formula: see text]m-type and Ia[Formula: see text]-type RE-rich phases were observed, and their effects on the magnetic properties were investigated. The distinct atomic distribution in the Ia[Formula: see text]-type phase characteristic [111] zone axis was observed via HAADF images in the diffused magnet. The Ia[Formula: see text]-type phase exhibited a lower lattice misfit with RE2Fe14B, favoring the formation of a larger nucleation field. The other grain boundaries with low coherence exhibit significant Cu enrichment. The lower lattice misfit and Cu-rich zone are critical for higher coercivity. |
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| ISSN: | 2166-3831 |