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Meeting 2025 TMS Annual Meeting & Exhibition
Symposium Characterization of Minerals, Metals and Materials 2025: In-Situ Characterization Techniques
Presentation Title H-11: Characterization of Feedstock and Recovered End-of-Life NdFeB Magnet Using X-Ray Absorption and Emission Spectroscopy
Author(s) Khagesh Kumar, Mikhail A Solovyev, Matthew Robert Earlam, Michael Joseph Dziekan, Eva Allen, Jessica Durham Macholz
On-Site Speaker (Planned) Khagesh Kumar
Abstract Scope Rare-earth elements (REE) are in great demand due to their wide application in green technologies; however, due to their limited availability, there is a push to develop recycling and recovery technologies for these REEs. For the development and improvement of these technologies, there is a need for characterization tools that allow high-throughput chemical characterization to ensure integration with the existing supply chain. In that context, we utilized synchrotron-based X-ray absorption (XAS) and emission spectroscopy (XES) to quantify the composition and chemical speciation of end-of-life (EoL) neodymium iron boron (Nd-Fe-B) magnets feedstock and recovered product. The neodymium (Nd) was recovered using an electrorefining process. The high-throughput XAS and XES characterization provides chemical composition and speciation of recovered material, which can help integrate the recovery with downstream processes.
Proceedings Inclusion? Planned:
Keywords Recycling and Secondary Recovery, Magnetic Materials, Characterization

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Atom Probe Tomography on a Novel Mg-Er Alloy
Characterization of Polymer Resin Composite With Fiberglass and Polycarbonate Microfibers for Applications in Small-Scale Boat Models
Characterizing Battery Materials with a New Mass Spectrometry Technique
Characterizing Microstructural Texture of Polycrystalline Materials Using Ultrasonic Scattering
Chemo-Mechanical Characterization of V2O5 Single Crystals Via Nanoindentation and In Situ Lithiation
Correlative Transmission Electron Microscopy For In Situ Grain Growth Studies in Metallic Thin Films
Cu-Sn Anode Failure: Understanding the Mechanism From the Optical Approach
Deep Learning Based Reconstruction From Sparse 2D Projection Datasets for In Situ Tensile Experiments
Dendrite Growth Observation of the Ni-Based System Using In-Situ Synchrotron Imaging
Deployment and Testing of a Fiber-Based Instrument for In-Reactor Thermal Property Measurements at MIT Research Reactor
Developing In-Situ Diagnostics for Evaluation of Incipient Electrochemical Nucleation and Growth
Development and Characterization of an Ultrastrong Single-Phase High Entropy Alloy With Enhanced Ductility
Development of Axlebox Bearing Temperature Monitoring System to Ensure the Operation Safety of Railway Vehicle
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Enabling Advances in Electron Backscatter Diffraction With Direct Electron Detectors (DED)
Enhancement Recovery of Fine Kaolin Particles by Microbubble Flotation
Estimation of Elastic Constants in Low Symmetry Materials With In-Situ Neutron Diffraction
Estimation of Online Homogenization of a Particle Mixture With Acoustic Emission
H-10: Characterization and Mechanical Analysis of Different Types of Biochar Incorporated Into Coating Mortar
H-11: Characterization of Feedstock and Recovered End-of-Life NdFeB Magnet Using X-Ray Absorption and Emission Spectroscopy
H-12: Characterization of Yellow and Red Clays and Bauxite Residue: Analysis of Properties and Potential for Ceramic Products
H-13: Contribution of Mineral Oil on Pore Stability of Alkali-Activated Composites for Co2 Capture
H-15: Durability Evaluation of Cement-Based Composites Reinforced With Guaruman Fibers
H-16: Effects of Red Mud on the Mechanical and Piezoresistive Properties of Mortars
H-17: Evaluation of Applicability of Natural Pineapple Leaf Fibers for Preparation of Coating Mortars
H-18: Evaluation of the Physical and Mechanical Properties of Extruded, Pressed, and Fired Red Ceramic Blocks
H-19: Experimental and Numerical Evaluation of Soil-Cement Blocks Under Simple Compression and Cyclic Shear Loads
H-20: Experimental and Numerical Modeling of Thermal Performance of Extruded, Pressed and Fired Ceramic Blocks
H-21: Feasibility of Incorporating Water Treatment Plant Sludge Into Ceramic Blocks
H-22: Influence of Marble Granulometry on the Hardened State Properties of Mortars
H-26: Microstructural Characterization of Nitrided Low Alloy Steel Using EPMA Scatter Diagram Method
H-27: Physico-Chemical and Mineralogical Characterization of Soils for the Production of Extruded, Pressed, and Fired Red Ceramic Blocks
H-28: Production and Evaluation of Technological Properties of Artificial Agglomerated Rock With Black Rock Waste São Gabriel
H-29: Rheological and Mechanical Viability of Alkali-Activated Pastes for Oil Well Application
H-30: Soil Blocks Using Geopolymer and Partial Replacement of Soil With Construction Waste
H-31: Technological Properties of Soil-Cement Bricks Produced With Soils From the Red Ceramic Industry of Campos Dos Goytacazes
H-8: Activation of Granite Waste by Grinding for Applications as a Precursor In Geopolymers
H-9: Analysis of Accelerated Degradation in the Laboratory of Pressed Ceramic Blocks of Red Ceramic
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In-Situ Characterization Methods for Thermophysical Property Measurements Using the Electro-Magnetic Levitator On-Board the International Space Station
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In-Situ Multi-Scale Analysis of Local Deformation Behavior of Lath Martensite in Low-Carbon-Steel
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Micromechanical Investigation of Defects in Single Crystal Ni-Based Superalloys
Microstructural Evolution of Fe-Bearing Intermetallic Particle After Thermo-Mechanical Processing Using X-Ray Microcomputed Tomography
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Study on the Influence of Utilization Ratio of Carbonaceous Particles Injection in BOF Steelmaking
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