About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Magnetic Materials
|
Presentation Title |
Influence of Severe Plastic Deformation on the Magnetic Properties of SmCo Permanent Magnets |
Author(s) |
Alexander Paulischin, Lukas Weissitsch, Stefan Wurster, Heinz Krenn, Reinhard Pippan, Andrea Bachmaier |
On-Site Speaker (Planned) |
Alexander Paulischin |
Abstract Scope |
The increasing global energy consumption over the past decade lead to a rising demand on high performance permanent magnets (PMs). These PMs, which are based on combinations of rare earths and transition metals, are commonly produced by conventional powder-metallurgical techniques such as milling, pressing and sintering.
In this study a novel approach to process PMs based on different SmCo phases is presented by using high pressure torsion (HPT), a method of severe plastic deformation. SmCo powders are compacted in Ar atmosphere to prevent oxidation and subsequently HPT-deformed, resulting in dense bulk specimens with an ultrafine grained microstructure. The respective microstructures depend on the chosen deformation parameters (e.g. deformation temperature, applied strain) and are characterized using scanning electron microscopy as well as X-ray diffraction techniques. Magnetic properties are measured by SQUID magnetometry and the results show a strong correlation between the magnetic properties and the applied amount of deformation. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Powder Materials, Other |