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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Advanced Magnetic Materials for Energy and Power Conversion Applications
Presentation Title High Temperature Performance of Dy-free Nd<sub>2</sub>Fe<sub>14</sub>B Based-permanent Magnets
Author(s) Kinjal Gandha, Wei Tang, Cajetan Nlebedim
On-Site Speaker (Planned) Kinjal Gandha
Abstract Scope The demands of Nd<sub>2</sub>Fe<sub>14</sub>B based permanent magnets is rapidly increasing due to their excellent magnetic performance for various applications. However, high temperature operations require the addition of significant quantities of Dy; a critical rare earth element. Pr<sub>2</sub>Fe<sub>14</sub>B has high anisotropy in comparison to Nd<sub>2</sub>Fe<sub>14</sub>B, therefore substitution of Pr for Nd in Nd-Fe-B should improve high temperature performance. In this work, effects of Nd and Pr concentration, and co-addition of TiC on crystallization process have been systematically investigated. The temperature dependence of magnetic properties were also studied. We obtained high coercivity ~20 kOe at 300 K in (Nd<sub>0.65</sub>Pr<sub>0.35</sub>)<sub>2.6</sub>Fe<sub>14</sub>B melt-spun ribbons with 4 wt.% TiC without significant reduction in remanence. This work demonstrates the ability to control the evolution of hard magnetic properties in NdFeB magnets by controlling rare earth concentration and microstructural grain refinement.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A New, Structural, Permanent Magnet Based on the Theory of High Entropy Alloys
A Study on Microstructure of Nb-Ti Based Alloy with Strain and Heat-treatment
Accelerated Discovery of Magnetic Alloys with Decreased Critical Materials
Additive Manufacturing for Superior Alnico Magnets
Additive Manufacturing of High Performance NdFeB Bonded Magnets
Additive Manufacturing of Highly Reactive Lanthanides
Addressing Criticality in Magnetic Materials: A System Level Performance Assessment Approach
Advances in Solid State Texture Development in Powder Processed Alnico Magnets
Amorphous and Nanocomposite Magnets for High Efficiency, High Speed Motor Designs
Anisotropic Dense Bulk MnBi Magnets with High Magnetic Performance
Application Impact of Magnetic Ribbon Core Strain Annealing
Building 3D Structures from Amorphous and Nanocrystalline Ribbon for Applications in High Efficiency Motors
Characterization of Novel Soft Magnetic and Magnetocaloric Composites
Coercivity Development in Mn-Al Alloys with Multi Elemental Additions
Comparing Binder Jetting and Laser Metal Deposition for Ni-Mn-based Functional Magnetic Materials
Compositionally Dependent Superparamagnetic Behavior of Fe-Ni Nanoparticles
Core Loss Measurements and Benchmarking of Commercial Soft Magnetic Core Materials for High Frequency Power Conversion
Core Loss Reduction of Electrical Motor Being Applied to by Low Iron Loss
Crystallization Kinetics in (Fe70Ni30)80Nb4Si2B14 Metal Amorphous Nanocomposites (MANCs)
Development of Filaments for 3D Printing from Recycled Materials
Development of Iron-rich (Fe,Ni,Co)-based Nanocrystalline Magnets with Minimized Magnetostriction
Effect of Cooling Rate on the Magnetic and Mechanical Properties of Melt Spun Fe-6.5 wt.% Electric Steel
Effect of Mn and Sb Substitutions on the Structural and Magnetic Properties of Fe1-xMnxSn1-ySby Alloys
Efficient Energy-conversion Near Room-temperature with Transition Metal Based Magnetic Materials
Energy Dense Processing of Magnetic Materials
Engineering of Magnetic Properties of Co- and Fe-rich Microwires by Stress Annealing
Fabrication of Nanocomposite Magnets with High Energy Density: Challenges and Approaches
Field-annealed Amorphous and Nanocrystalline Ribbons and Composites with Improved Energy Performance
High Temperature Performance of Dy-free Nd2Fe14B Based-permanent Magnets
Imaging of Magnetic Domain Dynamics at Power Frequency
Influence of Co-doping on the Crystal Structure, Magnetocaloric Properties and Elastic Moduli of the La(Fe,Si)13 Compound
Investigating an Exchange-spring Magnet for Direct-drive Wind Turbine Generators
Laser Additive Manufacturing of Magnetic Materials
Leakage Flux Induced Losses and Shielding in Magnetic Ribbon Cores
Magnetic Domains and Microstructure in Nanocrystalline Soft Magnetic Fe-Si Alloys
Magnetocaloric Effect and Local Structure in B/In-substituted Gd-Co-Al Metallic Glasses
Magnetocaloric Properties of (Fe,Mn)3Al Based Alloys under Hydrostatic Pressure
Methods for Characterizing the Hysteresis of Magnetocaloric Materials
Microstructural Effects of Thermomagnetic Processing in Nd2Fe14B-based Permanent Magnet Materials
Microstructural Stability of Additively Manufactured Soft Magnetic Composites
Microstructure and Coercivity in Alnico Permanent Magnets
Multiport Converter and High Frequency Transformer Technology for Grid Integration of Distributed Generation Resources
Nd-Fe-B Permanent Magnets with Ultimate Hard Magnetic Properties
Nitrogenation of Nd1-xZrxFe10Si2 with the ThMn12-type Structure as a Candidate Alloy for Permanent Magnets
Opportunities and Challenges of Fe16N2 Compound Based Rare-earth-free Permanent Magnet
Optimisation of Magnetically Hard Pyromagnets
Processing of Magnetic Materials Enhanced by Magnetic Fields or Electric Currents
Quantifying Contributions of Praseodymium and Dysprosium to Hard Magnetic Properties of Nd-Fe-B Magnets
Role of Ga on the Microstructure and Coercivity in Nd-rich Ga-doped Nd-Fe-B Sintered Magnets
Severe Plastic Deformation as a Tool for Production Advanced Magnetic Materials
Single-crystalline Nd-Fe-B Nanoparticles via Low-energy Ball Milling
Spin Seebeck Effect and Anisotropy in Magnetic Oxides
Strategies for the Development of Coercivity in Rare Earth-lean High-energy Permanent Magnets
Structural and Magnetic Properties of RE-Fe Compounds with Tetragonal ThMn12 Structure
The Advantages Offered by the Additive Manufacturing Approach in the Production of Soft Magnetic Silicon Steel Parts: from the Fabrication to the Magnetic and Mechanical Characterisation of the Printed Material
Toward Production of Bulk Exchange-spring Magnets
Tuning of Magnetic Properties of Heusler-type Glass-coated Microwires

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