About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Advanced Magnetic Materials for Sensors, Power, and Multifunctional Applications
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Presentation Title |
Correlation of Microstructure and Hard Magnetic Properties in Ce-Fe-B Magnet |
Author(s) |
Xubo Liu, Ikenna C Nlebedim |
On-Site Speaker (Planned) |
Xubo Liu |
Abstract Scope |
Resource-rich and cost-effective Ce-Fe-B magnets suffered from a low coercivity (200-400 kA/m) due to a weak magnetic anisotropy field (Ha= 2.40 MA/m). In this work, we have studied the correlation between microstructure and coercivity in Ce-Fe-B magnet using a large-scale micromagnetic simulation. The distribution and the magnetic properties of the grain boundary phase (GBP) have the most critical effect on coercivity. The nucleation of magnetization reversal prefers at the surface of the Ce2Fe14B (2:14:1) grain neighboring with a soft magnetic GBP or that without GBP isolated it from other 2:14:1 grains. Additionally, the local misalignment of 2:14:1 grains reduces the coercivity and squareness of the magnetization hysteresis loop. Further, the fluctuation of magnetic anisotropy and the variation of grain size significantly impact the squareness. We will present tuning of the distribution and properties of GBP as an effective way for improving coercivity in Ce-Fe-B magnet. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, |