| About this Abstract |
| Meeting |
TMS Specialty Congress 2024
|
| Symposium
|
Accelerating Discovery for Mechanical Behavior of Materials 2024
|
| Presentation Title |
Bulk Rare Earth Free Permanent Magnets by Severe Plastic Deformation |
| Author(s) |
Andrea Bachmaier, Lukas Weissitsch, Stefan Wurster, Heinz Krenn |
| On-Site Speaker (Planned) |
Andrea Bachmaier |
| Abstract Scope |
High-performance permanent magnets, which are usually based on rare earth elements (NdFeB and SmCo), are critical parts in energy conversion technologies such as electric motors or power generators. However, the U.S. Department of Energy and the European Commission listed several rare-earth elements as critical materials, as supply shortages will be a crucial problem for future economic development.
The ferromagnetic α-MnBi phase is a promising alternative magnetic material, but synthesis of large volumes containing a significant amount of α-MnBi is still challenging. To overcome current processing limitations, we use (multistep) high-pressure torsion, a method of severe plastic deformation in combination with magnetic field assisted thermal treatment. Annealing induced changes are monitored by in-situ synchrotron X-ray diffraction and the α-MnBi phase formation is correlated with different HPT-deformation grades. Results obtained by means of electron microscopy and SQUID magnetometry emphasize a positive influence of HPT-deformation and annealing on α-MnBi phase formation. |
| Proceedings Inclusion? |
Definite: Other |