About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Magnetics and the Critical Materials Challenge: An FMD Symposium Honoring Matthew J. Kramer
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Presentation Title |
Developing Substitutes for Magnetic Alloys |
Author(s) |
Thomas A. Lograsso |
On-Site Speaker (Planned) |
Thomas A. Lograsso |
Abstract Scope |
The search for alternative alloys and in particular magnetic alloys necessarily involves an integrated computational/experimental approach. Machine learning can accelerate the identification of potential substitutes, those that have sufficient intrinsic properties, but real candidates are determined by extrinsic properties arising from microstructural features developed via thermomechanical processing. Two examples of materials substitution, driven by the desire to reduce critical rare earth content will be discussed. The first example is the development of galfenol, a magnetostrictive alloy to replace terfenol-D which contains high amounts of both Tb and Dy. The second example is CeCoCuFe-based permanent magnets developed in the Critical Materials Institute (CMI). CMI focuses on reducing Nd or Sm through replacement with La or Ce, while maximizing Fe use and minimizing cobalt. Unlike other RE-based magnets, the microstructural aspects responsible for coercivity in this alloy are unique and required careful electron microscopy to identify the origins. |
Proceedings Inclusion? |
Planned: |
Keywords |
Magnetic Materials, Other, |