About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Field-Assisted Material Processing and Solidification
|
| Presentation Title |
Magnetic and mechanical hardening of nano-lamellar magnets using thermo-magnetic fields |
| Author(s) |
Liuliu Han |
| On-Site Speaker (Planned) |
Liuliu Han |
| Abstract Scope |
High-performance rare-earth-free magnets are attractive for sustainable energy conversion but remain limited by the difficulty of simultaneously achieving high magnetic and mechanical performance. Here, we demonstrate a thermo-magnetic field-assisted processing strategy that tailors eutectoid decomposition in a Co–Fe–Ni–Al multicomponent alloy. An externally applied magnetic field accelerates phase transformation kinetics, refines eutectoid colonies, and produces nano-lamellar structures with reduced interlamellar spacing compared with conventional heat treatment. The refined lamellar architecture and engineered phase interfaces simultaneously impede magnetic domain-wall motion and dislocation glide, leading to concurrent improvements in coercivity and mechanical strength. Microstructural characterization combined with thermodynamic analysis reveals the mechanisms by which the thermo-magnetic field modifies phase evolution and microstructure formation. The results establish field-assisted phase transformation as an effective pathway for controlling hierarchical microstructures in multicomponent alloys and provide a scalable processing strategy for developing multifunctional rare-earth-free magnets for demanding energy-conversion applications. |
| Proceedings Inclusion? |
Planned: |