About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Compositionally complex yet lean hard magnets via hierarchical precipitates |
| Author(s) |
Hongyu Chen |
| On-Site Speaker (Planned) |
Hongyu Chen |
| Abstract Scope |
The magnetic performance of Alnico derives mainly from the nanostructure formed via spinodal decomposition. To achieve an anisotropic nanostructure, time- and energy-consuming thermomagnetic treatments are often required to drive the nanostructure growth along the external magnetic field. The high Co content in Alnico enhances the thermal stability, while increasing the cost and brittleness. Here, we proposed an instability strategy to enhance the magnetic and mechanical performance of a cobalt-lean multicomponent hard magnet with a streamlined processing route. The intrinsic coercivity enhances from ~20 Oe to ~1006 Oe with enhanced remanence. Correlative atom probe tomography and micromagnetic simulations indicate that the substructures' morphology, size, chemistry, and stress that determine the coercivity mechanism need to be carefully tailored. This approach offers a simplified processing pathway to compositionally lean hard magnets with enhanced magnetic performance and low cost compared to commercial Alnico for sustainable electrification. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Magnetic Materials, Sustainability |