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

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

doi:10.1016/j.jmmm.2016.08.090

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

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

Nanomaterials Chemistry Group

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37 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	168-173
Number of pages	6
Journal	Journal of Magnetism and Magnetic Materials
Volume	422
DOIs	https://doi.org/10.1016/j.jmmm.2016.08.090
State	Published - Jan 15 2017

Funding

This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ).

Funders	Funder number
Critical Materials Institute
U.S. Department of Energy
Advanced Manufacturing Office
Office of Energy Efficiency and Renewable Energy
Ames Laboratory

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10.1016/j.jmmm.2016.08.090

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title = "Studies on in situ magnetic alignment of bonded anisotropic Nd-Fe-B alloy powders",

abstract = "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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AU - Nlebedim, I. C.

AU - Ucar, Huseyin

AU - Hatter, Christine B.

AU - McCallum, R. W.

AU - McCall, Scott K.

AU - Kramer, M. J.

AU - Paranthaman, M. Parans

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

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