Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation

Kassen, Aaron G.; White, Emma M.  H.; Tang, Wei; Hu, Liangfa; Palasyuk, Andriy; Zhou, Lin; Anderson, Iver E.

doi:10.1007/s11837-017-2453-0

Title: Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation

Abstract

We present economic uncertainty in the rare earth (RE) permanent magnet marketplace, as well as in an expanding electric drive vehicle market that favors permanent magnet alternating current synchronous drive motors, motivated renewed research in RE-free permanent magnets like “alnico,” an Al-Ni-Co-Fe alloy. Thus, high-pressure, gas-atomized isotropic type-8H pre-alloyed alnico powder was compression molded with a clean burn-out binder to near-final shape and sintered to density >99% of cast alnico 8 (full density of 7.3 g/cm³). To produce aligned sintered alnico magnets for improved energy product and magnetic remanence, uniaxial stress was attempted to promote controlled grain growth, avoiding directional solidification that provides alignment in alnico 9. Lastly, successful development of solid-state powder processing may enable anisotropically aligned alnico magnets with enhanced energy density to be mass-produced.

Authors:

^[1]; White, Emma M. H. ^[2]; Tang, Wei ^[2]; Hu, Liangfa ^[2]; Palasyuk, Andriy ^[2]; Zhou, Lin ^[2]; Anderson, Iver E. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States). Department of Materials Science and Engineering
Ames Lab. and Iowa State Univ., Ames, IA (United States)

Publication Date:: Fri Jul 14 00:00:00 EDT 2017

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:: 1374730

Report Number(s):: IS-J-9368
Journal ID: ISSN 1047-4838; PII: 2453

Grant/Contract Number:: AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: JOM. Journal of the Minerals, Metals & Materials Society

Additional Journal Information:: Journal Volume: 69; Journal Issue: 9; Journal ID: ISSN 1047-4838

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Kassen, Aaron G., White, Emma M.  H., Tang, Wei, Hu, Liangfa, Palasyuk, Andriy, Zhou, Lin, and Anderson, Iver E. Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation.  United States: N. p., 2017. 
Web.  doi:10.1007/s11837-017-2453-0.

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                    Kassen, Aaron G., White, Emma M.  H., Tang, Wei, Hu, Liangfa, Palasyuk, Andriy, Zhou, Lin, & Anderson, Iver E. Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation.  United States.  https://doi.org/10.1007/s11837-017-2453-0

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                    Kassen, Aaron G., White, Emma M.  H., Tang, Wei, Hu, Liangfa, Palasyuk, Andriy, Zhou, Lin, and Anderson, Iver E. Fri .  
"Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation".  United States.  https://doi.org/10.1007/s11837-017-2453-0.  https://www.osti.gov/servlets/purl/1374730.

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@article{osti_1374730,

  title        = {Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation},

  author       = {Kassen, Aaron G. and White, Emma M.  H. and Tang, Wei and Hu, Liangfa and Palasyuk, Andriy and Zhou, Lin and Anderson, Iver E.},

  abstractNote = {We present economic uncertainty in the rare earth (RE) permanent magnet marketplace, as well as in an expanding electric drive vehicle market that favors permanent magnet alternating current synchronous drive motors, motivated renewed research in RE-free permanent magnets like “alnico,” an Al-Ni-Co-Fe alloy. Thus, high-pressure, gas-atomized isotropic type-8H pre-alloyed alnico powder was compression molded with a clean burn-out binder to near-final shape and sintered to density >99% of cast alnico 8 (full density of 7.3 g/cm3). To produce aligned sintered alnico magnets for improved energy product and magnetic remanence, uniaxial stress was attempted to promote controlled grain growth, avoiding directional solidification that provides alignment in alnico 9. Lastly, successful development of solid-state powder processing may enable anisotropically aligned alnico magnets with enhanced energy density to be mass-produced.},

  doi          = {10.1007/s11837-017-2453-0},

  journal      = {JOM. Journal of the Minerals, Metals & Materials Society},

  number       = 9,

  volume       = 69,

  place        = {United States},

  year         = {Fri Jul 14 00:00:00 EDT 2017},

  month        = {Fri Jul 14 00:00:00 EDT 2017}

}

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https://doi.org/10.1007/s11837-017-2453-0

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Cited by: 6 works

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Works referenced in this record:

Effect of Co on the thermal stability and magnetic properties of AlNiCo 8 alloys
journal, May 2014

Liu, Tao; Li, Wei; Zhu, Minggang
Journal of Applied Physics, Vol. 115, Issue 17
DOI: 10.1063/1.4868083

Some relationships between crystal textures and magnetic properties of alnico 8
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Higuchi, A.; Miyamoto, T.
IEEE Transactions on Magnetics, Vol. 6, Issue 2
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Texture and Magnetic Properties
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Bunge, H. J.
Textures and Microstructures, Vol. 11, Issue 2-4
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Current status and recent topics of rare-earth permanent magnets
journal, January 2011

Sugimoto, S.
Journal of Physics D: Applied Physics, Vol. 44, Issue 6
DOI: 10.1088/0022-3727/44/6/064001

Architecture and magnetism of alnico
journal, August 2014

Zhou, Lin; Miller, M. K.; Lu, Ping
Acta Materialia, Vol. 74
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Novel pre-alloyed powder processing of modified alnico 8: Correlation of microstructure and magnetic properties
journal, May 2015

Anderson, I. E.; Kassen, A. G.; White, E. M. H.
Journal of Applied Physics, Vol. 117, Issue 17
DOI: 10.1063/1.4916996

Highly tuned gas atomization for controlled preparation of coarse powder. Hochleistungsgasverdüsung für die gezielte Präparation grober Pulver
journal, July 2010

Anderson, I. E.; Byrd, D.; Meyer, J.
Materialwissenschaft und Werkstofftechnik, Vol. 41, Issue 7, p. 504-512
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Prospects for Non-Rare Earth Permanent Magnets for Traction Motors and Generators
journal, June 2012

Kramer, M. J.; McCallum, R. W.; Anderson, I. A.
JOM, Vol. 64, Issue 7
DOI: 10.1007/s11837-012-0351-z

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Similar Records

Title: Compression Molding and Novel Sintering Treatments for Alnico Type-8 Permanent Magnets in Near-Final Shape with Preferred Orientation

Abstract

Citation Formats

Effect of Co on the thermal stability and magnetic properties of AlNiCo 8 alloys journal, May 2014

Some relationships between crystal textures and magnetic properties of alnico 8 journal, June 1970

Texture and Magnetic Properties journal, January 1989

Current status and recent topics of rare-earth permanent magnets journal, January 2011

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journal, May 2014

Some relationships between crystal textures and magnetic properties of alnico 8
journal, June 1970

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journal, January 1989

Current status and recent topics of rare-earth permanent magnets
journal, January 2011

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journal, August 2014

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journal, May 2015

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journal, July 2010

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journal, June 2012