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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Magnetics and the Critical Materials Challenge: An FMD Symposium Honoring Matthew J. Kramer
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,


A Solution to the Permalloy Problem
Challenges in Affordable, Reliable Permanent Magnets
Controlling First-order Magnetic Phase Transitions in Rare-earth Intermetallics
Critical Materials Challenges in ThMn12-type Hard Magnetic Alloys for Permanent Magnets
Developing Substitutes for Magnetic Alloys
Far-from-equilibrium Materials Processing
From High-throughput Synchrotron Diffraction to Closed-loop Autonomous Materials Discovery
Giant Saturation Magnetization of Fe-based Soft Magnetic Amorphous Alloy by Introducing Nitrogen
HDDR Treatment on Nd2Fe14B-based Magnets in the Presence of an Applied Magnetic Field
Iron Nitride: a Non-rare-earth Containing Permanent Magnet
Like Poles Attraction and Unlike Poles Repulsion - Science Behind the Mystery
Magnetoelastic Interactions Reduce Hysteresis in Soft Magnets
Mechanically Strengthened Heterogeneous Sm-Co Sintered Magnets
Microstructural Evolutions, Phase Transformations and Hard Magnetic Properties in Polycrystalline Ce-Co-Fe-Cu Alloys
Nanocomposite Soft Magnetics: Applications, State-of-art, and Emerging Trends
Structure and Magnetic Properties of Galfenol Nanocomposite Alloys
Synthesis and Characterization of Rare-earth-based Metallic Glasses
Synthesis and Stabilization of Magnetic Nanoparticles of Rare-earth Metal Alloys
Utilizing High Energy X-rays to Perform In Situ observations of Alnico Spinodal Evolution

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