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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Advanced Magnetic Materials for Sensors, Power, and Multifunctional Applications
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

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Enhanced Magnetostriction in Galfenol through Dilute Ce-doping
Evolution of Magnetic Properties during the Post-annealing Process for the Sintered (NdLa)-(FeCo)-B Based Magnets
Flash Annealing of FeNi-based Metal Amorphous Nanocomposite
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