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

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.

Authors:

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)

Publication Date:: Tue Aug 30 00:00:00 EDT 2016

Research Org.:: 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 Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office

OSTI Identifier:: 1376655

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

Report Number(s):: LLNL-JRNL-698023; IS-J-9071
Journal ID: ISSN 0304-8853

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

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Magnetism and Magnetic Materials

Additional Journal Information:: Journal Volume: 422; Journal Issue: C; Journal ID: ISSN 0304-8853

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; polymer binders; high performance bonded magnets

Citation Formats


                    Nlebedim, I. C., Ucar, Huseyin, Hatter, Christine B., McCallum, R. W., McCall, Scott K., Kramer, M. J., and Paranthaman, M. Parans. Studies on in situ magnetic alignment of bonded anisotropic Nd-Fe-B alloy powders.  United States: N. p., 2016. 
Web.  doi:10.1016/j.jmmm.2016.08.090.

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                    Nlebedim, I. C., Ucar, Huseyin, Hatter, Christine B., McCallum, R. W., McCall, Scott K., Kramer, M. J., & Paranthaman, M. Parans. Studies on in situ magnetic alignment of bonded anisotropic Nd-Fe-B alloy powders.  United States.  https://doi.org/10.1016/j.jmmm.2016.08.090

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                    Nlebedim, I. C., Ucar, Huseyin, Hatter, Christine B., McCallum, R. W., McCall, Scott K., Kramer, M. J., and Paranthaman, M. Parans. Tue .  
"Studies on in situ magnetic alignment of bonded anisotropic Nd-Fe-B alloy powders".  United States.  https://doi.org/10.1016/j.jmmm.2016.08.090.  https://www.osti.gov/servlets/purl/1376655.

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@article{osti_1376655,

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

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

  abstractNote = {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.},

  doi          = {10.1016/j.jmmm.2016.08.090},

  journal      = {Journal of Magnetism and Magnetic Materials},

  number       = C,

  volume       = 422,

  place        = {United States},

  year         = {Tue Aug 30 00:00:00 EDT 2016},

  month        = {Tue Aug 30 00:00:00 EDT 2016}

}

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https://doi.org/10.1016/j.jmmm.2016.08.090

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Dynamic mechanical properties and morphology of polyethylene/ethylene vinyl acetate copolymer blends: Dynamic Mechanical Properties and Morphology of PE/EVA Blends
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Works referencing / citing this record:

Development and Characterization of Stable Polymer Formulations for Manufacturing Magnetic Composites
journal, January 2020

Nagarajan, Balakrishnan; Kamkar, Milad; Schoen, Martin A. W.
Journal of Manufacturing and Materials Processing, Vol. 4, Issue 1
DOI: 10.3390/jmmp4010004

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

Abstract

Citation Formats

Formation cause, composition analysis and comprehensive utilization of rare earth solid wastes journal, December 2009

Bonded permanent magnets: Current status and future opportunities (invited) journal, April 1997

Current status and future outlook for bonded neodymium permanent magnets (invited) journal, April 1997

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Synthesis and characterization of new organosoluble polyimides based on flexible diamine journal, June 2001

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Experimental approach to coercivity analysis in hard magnetic materials journal, January 1990

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Magnetization reversal mechanism in perpendicular exchange-coupled Fe/L1 0 –FePt bilayers journal, July 2012

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journal, September 2012

Cure of epoxy novolacs with aromatic diamines. I. Vitrification, gelation, and reaction kinetics
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Assisted heterogeneous multinucleation and bubble growth in semicrystalline ethylene-vinyl acetate copolymer/expanded graphite nanocomposite foams: Control of morphology and viscoelastic properties
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Investigation of Ethylene/Vinyl Acetate Copolymer (EVA) by thermal analysis DSC and DMA
journal, April 2011

Morphology and properties of polypropylene/ethylene vinyl acetate copolymer/wood powder blend composites
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Dynamic mechanical behavior of high-density polyethylene/ethylene vinyl acetate copolymer blends: The effects of the blend ratio, reactive compatibilization, and dynamic vulcanization: HDPE/EVA Copolymer Blends
journal, January 2003

Dynamic mechanical properties and morphology of polyethylene/ethylene vinyl acetate copolymer blends: Dynamic Mechanical Properties and Morphology of PE/EVA Blends
journal, October 2004

Dependence of the magnetic properties on the alignment magnetic field for NdFeB bonded magnets made from anisotropic HDDR powders
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Experimental approach to coercivity analysis in hard magnetic materials
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Angular dependence of the coercive field in sintered Fe77Nd15B8 magnets
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