Studies on in situ magnetic alignment of bonded anisotropic Nd-Fe-B alloy powders

Nlebedim, I. C.; Ucar, Huseyin; Hatter, Christine B.; McCallum, R. W.; McCall, Scott K.; Kramer, M. J.; Paranthaman, M. Parans

doi:10.1016/j.jmmm.2016.08.090

Title: Studies on in situ magnetic alignment of bonded anisotropic Nd-Fe-B alloy powders

Journal Article · Tue Aug 30 00:00:00 EDT 2016 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2016.08.090· OSTI ID:1376655

Nlebedim, I. C. ^[1]; Ucar, Huseyin ^[2]; Hatter, Christine B. ^[2]; McCallum, R. W. ^[1]; McCall, Scott K. ^[3]; Kramer, M. J. ^[1]; Paranthaman, M. Parans ^[2]

Ames Lab., Ames, IA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Considerations for achieving high degree of alignment in polymer bonded permanent magnets are presented via the results of a study on in situ magnetic alignment of anisotropic Nd-Fe-B magnet powders. Contributions from effect of the alignment temperature, alignment magnetic field and the properties of the polymer on the hard magnetic properties of the bonded magnet were considered. The thermo-rheological properties of the polymer and the response of the magnet powders to the applied magnetic field indicate that hard magnetic properties were optimized at an alignment temperature just above the melting temperature of the EVA co-polymer. This agrees with an observed correlation between the change in magnetization due to improved magnetic alignment of the anisotropic powders and the change in viscosity of the binder. Manufacturing cost can be minimized by identifying optimum alignment temperatures and magnetic field strengths.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office

Grant/Contract Number:: AC05-00OR22725; AC02-07CH11358; AC52-07NA27344

OSTI ID:: 1376655

Alternate ID(s):: OSTI ID: 1325874; OSTI ID: 1342935; OSTI ID: 1359366

Report Number(s):: LLNL-JRNL-698023; IS-J-9071

Journal Information:: Journal of Magnetism and Magnetic Materials, Vol. 422, Issue C; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 14 works

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Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites Nagarajan, Balakrishnan; Kamkar, Milad; Schoen, Martin A. W. Journal of Manufacturing and Materials Processing, Vol. 4, Issue 1 https://doi.org/10.3390/jmmp4010004	journal	January 2020

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