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 |
Evolution of Magnetic Properties during the Post-annealing Process for the Sintered (NdLa)-(FeCo)-B Based Magnets |
Author(s) |
Wei Tang, Jing Wang, Kinjal Gandha, Xubo Liu, Kevin Dennis, Ikenna Nlebedim, Ryan Ott, Scott McCall, David Parker, Jun Cui |
On-Site Speaker (Planned) |
Wei Tang |
Abstract Scope |
Replacing critical elements (Nd and Pr) in the RE<sub>2</sub>Fe<sub>14</sub>B-type magnet with less critical elements (La or Ce) has been intensively studied in the past ten years. However, the magnetic properties of the sintered magnets containing La or Ce are still much lower than the theoretical values predicted from the intrinsic properties of the La/Ce<sub>2</sub>Fe<sub>14</sub> phase. The magnetic properties of a magnet are predominantly governed by its microstructures, which are sensitive to fabrication processes. Here, we report our work on understanding the effect of annealing processes on the magnetic properties of the sintered (Nd<sub>0.75</sub>La<sub>0.25</sub>)<sub>2.6</sub>Fe<sub>11.9</sub>Co<sub>2</sub>Ga<sub>0.1</sub>B magnet. Multi-stage annealing between 580°C and 460°C with different dwelling times has a dramatic impact on the magnetic properties of the magnet. The highest H<sub>c</sub> and (BH)<sub>max</sub> achieved are 9 kOe and 32.4 MGOe, respectively. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Process Technology, Powder Materials |