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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 Microstructural Evolutions, Phase Transformations and Hard Magnetic Properties in Polycrystalline Ce-Co-Fe-Cu Alloys
Author(s) Kinjal Gandha, Rakesh Chaudhary, Matthew Kramer, Ryan Ott, Durga Paudyal, Ikenna Nlebedim
On-Site Speaker (Planned) Ikenna Nlebedim
Abstract Scope 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.
Proceedings Inclusion? Planned:
Keywords Magnetic Materials, Phase Transformations, 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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