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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advances in Magnetic Materials
Presentation Title D-15: Effects of Machining and Electroplating on Magnetic Properties of Small Sintered NdFeB Magnets
Author(s) Min Zou, Jinghui Di, Abby Shen, Michelle Qian, Hui Meng, Qifeng Wei, Christina Chen
On-Site Speaker (Planned) Min Zou
Abstract Scope Sintered NdFeB magnets with one or more of their dimensions less than 5 mm or even 1 mm are now widely used when high performance, low cost, and limit in space and weight are simultaneously demanded, for example in mobile phones, tablets, and laptop computers. These small sized magnets are commonly machined from as-sintered blocks, and then coated with anti-corrosion materials by electroplating. Machining and surface treatment prior to electroplating potentially risk magnetic properties due to damaged surface grains and oxygen/humidity exposure. In this presentation, the effects of machining and electroplating conditions on the magnetic properties of several grades of NdFeB magnets with their dimensions ranging from a few millimeters to less than 1 mm will be illustrated. The approaches of mitigating the risk of the magnetic property degradation during machining and electroplating process will be discussed.
Proceedings Inclusion? Planned:
Keywords Magnetic Materials,

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Semi-continuous Hot Deformation Method for Making Anisotropic Nd-Fe-B Magnet
Computer-aided Optimization of Packing Behavior of Soft-magnetic Amorphous Powder
Crystallization Characteristics in Co-based Magnetic Amorphous Nanocomposites
Crystallization Kinetics and Magnetic Properties of Co-Fe2.3Mn2.3Nb4Si2B14 Nanocomposite Ribbon
D-15: Effects of Machining and Electroplating on Magnetic Properties of Small Sintered NdFeB Magnets
D-16: Investigating Irradiated Superconducting Magnet Insulation Materials for Particle Accelerators and Other High-dose Environments
D-17: Microstructural Processing and Phase Stabilization Analysis of Off-stoichiometric Fe-Mn-Ga Shape Memory Alloy
D-18: Order-disorder Transition and Antiferromagnetism in Cu-Mn-Al BCC Alloys
D-19: Polyurethane Based Composites for Magnetic Actuator Applications
D-20: The Effect of Stress-annealing on the Mechanical and Magnetic Properties in Fe-based Metal-amorphous Nanocomposites
Denitrogenation Process in ThMn12 Nitride by In Situ Neutron Powder Diffraction
Development of the Sintered (NdMM)-(FeCo)-B Based Magnets Substituted Nd by Less Critical Rare Earth (MM= La, Ce)
Development of Magnetic Refrigeration Materials for Cryogenic Applications
Effect of Nitrogen Martensite Formation on Magnetostriction in Fe-Co Alloy
Effect of Thermodynamic and Sintering Atmosphere Parameters on Magnetic Properties of Mn-Zn Ferrites
Enhanced Powder-Processed Alnico Magnets by Novel Solid-State Engineering of the Microstructure and Nanostructure
Enhancing Stability and Magnetism of ThMn12-type Cerium-iron Intermetallics by Site Substitution
Fe-doping Influence on the Magnetostrictive Behaviour of Ni–Mn–Ga–Co–In–Fe Magnetic Shape Memory Alloys
Grain Boundary Engineering for High Performance Heavy Rare-Earth Free Permanent Magnets
Hard Magnetic SmCo5-Cu Nanocomposites Produced by Severe Plastic Deformation
High-Temperature Stability of Induced Anisotropy and Permeability in Co-Rich Nanocrystalline Soft Magnetic Alloys
High Throughput Evaluation of Magnetic Alloys for Energy Applications
Incisive Review on Magnetic Iron Oxide Nanoparticles and Their Use in the Treatment of Bacterial Infections
Increased Energy Product of Nd2Fe14B-based Magnets Processed by Concurrent HDDR within Applied Magnetic Fields
Influence of Severe Plastic Deformation on the Magnetic Properties of SmCo Permanent Magnets
Investigations into the Processing and Magnetic Properties of Nd-Fe-B Magnets Produced by Extrusion
Low Magnetostrictive Materials Produced by Severe Plastic Deformation
Magnetoelastic Resonance Sensors: The Importance of Their Geometry on the Most Recent Applications
Magnetovolume Effects in Metamagnetic Shape Memory Heusler Compounds
Market Trends and Supply Chain Constraints for Soft Magnetic Materials
Mechanochemical Synthesis of Magnetostrictive Materials: Ce-doped Galfenol and Alfenol
Mixed Magnetic Phases in AlxCoCrNiFe High Entropy Alloy
R’yR’’1-yScX: Magnetically Compensated Materials for Spin-based Applications
Rhombic Magnetoelastic Sensors with MOF Active Layers: A Potential Tool for Wireless VOCs Detection
Superparamagnetic Iron Oxide-based Bulk Nanocomposites
The Impact of Packaging on Soft Magnetic Core Performance
The Search in the Vast High-entropy Alloy Space for Competitive Magnetocaloric Properties
Toughening Sm-Co Sintered Magnets by Additive-modified Microstructure Engineering
Towards One-step Castable Cerium-based Gap Magnet
Tunable Magnetics: Materials, Manufacturing, and Component Designs
Using Soft X-ray Photon Correlation Spectroscopy to Study Magnetic Helical Dynamics

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