|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Magnetics and the Critical Materials Challenge: An FMD Symposium Honoring Matthew J. Kramer
||Microstructural Evolutions, Phase Transformations and Hard Magnetic Properties in Polycrystalline Ce-Co-Fe-Cu Alloys
||Kinjal Gandha, Rakesh Chaudhary, Matthew Kramer, Ryan Ott, Durga Paudyal, Ikenna Nlebedim
|On-Site Speaker (Planned)
Developing alternatives/substitutes is an approach for addressing the challenges with sustainability in the supply of rare-earth-elements (REEs) for permanent magnets. Substantial efforts have been invested in Ce-based alloys as alternatives to magnets based on other critical REEs such as Nd, Pr, Dy and Sm (where applications allow). This presentation will include phase, microstructure and magnetic properties evolution in CeCo4.4-xFexCu0.6 and CeCo3.9-xFexCu1.2 (x=0-1.8). It will bridge the knowledge gap on how the constituent elements influence microstructural evolutions and the interaction between the competing phases (particularly near phase boundaries) and the functionality of the alloys as magnets. In both systems, the composition 0.6<x≥0.9 is near the boundary of solubility where other phase evolve, in addition to the 1:5 phase. We will present our systematic result on the phase evolutions with Fe and Cu contents and how the hard-magnetic properties respond. For example, increased Cu content enhanced coercivity to nearly 10kOe.
||Magnetic Materials, Phase Transformations, Other