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JOM

, Volume 71, Issue 2, pp 626–632 | Cite as

Low-Field Alignment of Anisotropic Bonded Magnets for Additive Manufacturing of Permanent Magnet Motors

  • Helena A. KhazdozianEmail author
  • Ling Li
  • M. Parans Paranthaman
  • Scott K. McCall
  • Matthew J. Kramer
  • Ikenna C. Nlebedim
Energy Materials
  • 115 Downloads

Abstract

Additive manufacturing techniques for fabricating bonded magnets have the potential to reduce manufacturing cost and time-to-market of products and address the criticality of rare-earth elements (REEs), which is a concern for economic design of dependent applications such as permanent magnet machines. We investigated the magnetic alignment of anisotropic bonded magnet material comprising 65 vol.% Nd-Fe-B in nylon-12 produced by extrusion in a 20-W brushless direct current surface permanent magnet motor for submersible water pump application using finite element analysis. The results predict that sufficient alignment for this application could be obtained at low alignment fields (μ0H ≤ 1 T) with a reduction in the volume of critical materials by up to 40% compared with isotropic permanent magnets. This demonstrates the economic feasibility of incorporating a magnetic alignment field source into additive manufacturing systems for bonded magnets, and the potential of aligned anisotropic bonded magnets to address REE criticality.

Notes

Acknowledgements

This research was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office. Work was performed at Ames Laboratory, ORNL, and LLNL under Contracts DE-AC02-07CH11358, DE-AC05-00OR22725, and DE-AC52-07NA27344, respectively. The authors would like to thank James Bell for providing the magnetic material.

Conflict of interest

All the authors have no competing financial interests.

Supplementary material

11837_2018_3242_MOESM1_ESM.pdf (528 kb)
Supplementary Material (PDF 527 kb)

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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  • Helena A. Khazdozian
    • 1
    Email author
  • Ling Li
    • 2
  • M. Parans Paranthaman
    • 2
  • Scott K. McCall
    • 3
  • Matthew J. Kramer
    • 1
  • Ikenna C. Nlebedim
    • 1
  1. 1.Ames LaboratoryAmesUSA
  2. 2.Oak Ridge National LaboratoryOak RidgeUSA
  3. 3.Lawrence Livermore National LaboratoryLivermoreUSA

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