| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Micromagnetic simulations of Nd-Fe-B magnets: toward digital twins |
| Author(s) |
Anton Bolyachkin, Nikita Kulesh, Xin Tang, Tadakatsu Ohkubo, Hossein Sepehri-Amin, Kazuhiro Hono |
| On-Site Speaker (Planned) |
Anton Bolyachkin |
| Abstract Scope |
High-performance Nd2Fe14B-based permanent magnets are essential functional components of modern motors and generators. The up-to-date challenge for Nd-Fe-B magnets is to realize a high coercivity avoiding the use of scarce heavy rare earth elements for applications at elevated temperatures. Hot-deformed Nd-Fe-B magnets are promising candidates to achieve this goal if their microstructure is refined and well controlled. The experimental route toward the optimized microstructure can be assisted by micromagnetic simulations. Such simulations are especially insightful on recently developed tomography-based finite element models which reconstructed a variety of microstructural features (shapes of the grains, their packing, intergranular phase, triple junctions, etc.). With these models, the coercivity and its mechanism were reproduced in simulations for an as-deformed Nd-Fe-B magnet while coercivity limits upon further microstructural transformations via the eutectic grain boundary diffusion process were established. These and other merits of the digital twins of Nd-Fe-B magnets will be discussed in this talk. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Modeling and Simulation, |