Development of Improved Powder for Bonded Permanent Magnets


Project Leader(s):
Iver Anderson

Principal Investigators:
Iver Anderson, Vladimir Antropov, Bruce Harmon, Kai-Ming Ho, Matthew Kramer, R. William McCallum, Cai-Zhuang Wang


This project has three main objectives.

  1. Develop high performance permanent magnets (PM) for traction motor with internal PM rotor:
    • requires elevated temperature (180-200°C) operation, minimize cooling needs
    • increased high temperature magnetic performance more critical than RT
  2. Reduce manufacturing cost of PM traction motors:
    • bonded PM can utilize injection or compression molding technology
      • net shape forming for mass production of rotors
  3. Achieve high performance and reliability for bonded magnets:
    • increase volumetric loading
    • minimize irreversible magnetic losses (oxidation)


Lu P; Zhou L; Kramer M J; Smith D J . 2014. Atomic-scale Chemical Imaging and Quantification of Metallic Alloy Structures by Energy-Dispersive X-ray Spectroscopy. Scientific Reports. 4:3945. abstract
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Zhao X; Nguyen M C; Zhang W Y; Wang C Z; Kramer M J; Sellmyer D J; Li X Z; Zhang F; Ke L Q; Antropov V P; Ho K M . 2014. Exploring the Structural Complexity of Intermetallic Compounds by an Adaptive Genetic Algorithm. Physical Review Letters. 112:045502. abstract
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Yu Y S; Sun K W; Tian Y; Li X Z; Kramer M J; Sellmyer D J; Shield J E; Sun S H . 2013. One-Pot Synthesis of Urchin-like FePd-Fe3O4 and Their Conversion into Exchange-Coupled L1(0)-FePd-Fe Nanocomposite Magnets. Nano Letters. 13:4975-4979. abstract
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Palasyuk A; Blomberg E; Prozorov R; Yue L; Kramer M J; McCallum R W; Anderson I E; Constantinides S . 2013. Advances in Characterization of Non-Rare-Earth Permanent Magnets: Exploring Commercial Alnico Grades 5-7 and 9. JOM. 65:862-869. abstract
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Nguyen M C; Ke L Q; Zhao X; Antropov V; Wang C Z; Ho K M . 2013. Atomic Structure and Magnetic Properties of HfCo7 Alloy. IEEE Transactions on Magnetics. 49:3281-3283. abstract
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Xing Q; Miller M K; Zhou L; Dillon H M; McCallum R W; Anderson I E; Constantinides S; Kramer M J . 2013. Phase and Elemental Distributions in Alnico Magnetic Materials. IEEE Transactions on Magnetics. 49:3314-3317. abstract
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Smith D J; Aoki T; Mardinly J; Zhou L; McCartney M R . 2013. Exploring aberration-corrected electron microscopy for compound semiconductors. Microscopy. 62:S65-S73. abstract
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Mukherjee P; Zhou L; Kramer M J; Shield J E . 2013. Formation of non-equilibrium Fe-Au solid solutions in nanoclusters. Applied Physics Letters. 102:243103. abstract
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Golkar F; Kramer M J; Zhang Y; Skomski R; Sellmyer D J; Shield J E . 2013. Solubility extension and phase formation in gas-condensed Co-W nanoclusters. Journal of Nanoparticle Research. 15:1638. abstract
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Gao T R; Wu Y Q; Fackler S; Kierzewski I; Zhang Y; Mehta A; Kramer M J; Takeuchi I . 2013. Combinatorial exploration of rare-earth-free permanent magnets: Magnetic and microstructural properties of Fe-Co-W thin films. Applied Physics Letters. 102:022419. abstract
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