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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Materials Engineering of Soft Magnets for Power and Energy Applications
Presentation Title Ferrite-coated Fe Soft Magnetic Composites: Balance of Magnetic Permeability and Electrical Resistivity
Author(s) Katie Jo Sunday, Mitra L. Taheri
On-Site Speaker (Planned) Katie Jo Sunday
Abstract Scope Soft magnetic materials are defined by high magnetic saturation and low coercivity; however, for soft magnetic composites, low hysteresis and eddy current losses are significant. Pushing curing temperature limits to properly stress relieve the ferromagnetic powder and maintain the insulating layer is only feasible with inorganic, thermally stable coatings. Soft ferrites allow for complete isolation of individual Fe particles, curing temperatures above 700<SUP>o</SUP>C, and minimal reduction in magnetic performance. This work compares three types of ferrites (NiZn-, MnZn-, and Fe-Fe<SUB>2</SUB>O<SUB>4</SUB>) applied via milling, compacting, and curing between 700 – 1000<SUP>o</SUP>C. The coating thickness and uniformity are explored via SEM, while grain structure with respect to temperature are determined via EBSD. Each coating material has different magnetic saturation and resistivity which will control hysteresis and eddy current losses, respectively. This work explores the coating-core interface via TEM/EELS for diffusion of oxygen along the particle boundaries and phase dependence on resistivity.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Advanced Magnetic Polymer Nanocomposites for High Frequency Device Applications
Advanced Magneto-Optical Domain Analysis in Soft Magnetic Materials
Advanced Soft Magnetic Materials for Highly-efficient Electric Motors
Candidate Coatings for Soft Magnet Composites: Insights Gained from Multiscale Electron Microscopy
Challenges to the Commercial Acceptance of Amorphous and Nanocrystalline Soft Magnetic Materials
Combinatorial High-throughput Discovery of Magnetic Materials in Thin Films
Consolidation and Behavior of Bulk Iron Nitride Soft Magnets via Spark Plasma Sintering
Consolidation of Bulk Ferrimagnetic Rare Earth Iron Garnets
Crystallization Products and Strain Annealing Effects in (FexNi1-x)80Nb4Si2B14 Metal Amorphous Nanocomposites (MANCs)
Development of Fe-based Bulk Metallic Glasses with Both High Saturation Flux Density and High Glass Forming Ability
Development of Mold Inductor for Power Conversion System
Direct Measurement of the Magnetocaloric Effect in NiMnIn Ribbons
Effect of Annealing Time on the Texture of a 2.8% Si Non-Oriented Electrical Steel after Inclined and Skew Rolling
Effects of Cooling Rate on 6.5% Silicon Steel Ordering
Ferrite-coated Fe Soft Magnetic Composites: Balance of Magnetic Permeability and Electrical Resistivity
Large Magnetocaloric Effect in Ga Substituted NiMnIn Metamagnetic Shape Memory Alloys
Magnetic Material Excited by Power Electronics in Electrical Engineering
Magnetic Properties of Shear-textured Fe-Si Sheet Produced by Simple Shear Deformation
Multi-parameter Magnetic Material Characterization for High Power Medium Frequency Converters
Nanocomposite Soft Magnetic Materials for High Frequency and High Power Conversion Applications
Novel Silicon Steel Nanocomposites via Severe Shear Deformation Approaches
Opportunities and Challenges in the Additive Manufacture of Soft Magnetic Silicon Steel Parts: Processing, Material Properties and Component Design
Structure-Processing-Property Relationships in High Temperature Nanocomposite Soft Magnets
Study of Temperature Dependent Magnetic Properties of Zr+4 and Ti+4 Substituted Cobalt Ferrites
Unique Magnetostriction of Fe68.8Pd31.2 Attributable to De-twinning Mechanism

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