About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Magnetism and Magnetic Materials
|
| Presentation Title |
Reaction Pathways in Direct Reduction of Rare Earth Oxides to Magnets |
| Author(s) |
R. Kuchi, I. Z. Hlova, S. O’Donnell, R. Smaha, S. Bauers, C. Rom, A. Berseneva, M. Prime, A. Amon, A. Baker, A. Schmidig, Y. Mudryk, Matthew J. Kramer |
| On-Site Speaker (Planned) |
Matthew J. Kramer |
| Abstract Scope |
Traditional production of rare earth permanent magnets involves melting, casting, milling and sintering. Refining metals from the oxides is costly and an energy intensive process. Light rare earth (LRE) metals can be co-reduced from their oxides using Ca in the presence of Fe as there is no solubility between Fe and Ca, even in the liquid state. The reduction of the LRE2O3 proceeds rapidly once the Ca is melted in an inert environment since the Ca has a higher affinity for oxygen and the Ca is mutually immiscible with most RE metals. Once melted, the reduced LRE and Fe rapidly react to form intermetallic compounds, resulting in micron size powders. To better understand the reaction pathways, we investigated this synthesis route to form magnetic phases of Sm2Fe17 and Nd2Fe14B directly from their oxides by heating the pre-mixed precursors and monitoring the reaction process in situ using high energy synchrotron XRD. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Phase Transformations, Characterization |