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Additive Manufacturing of Anisotropic Sm-Fe-N Nylon Bonded Permanent Magnets
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  • Kinjal Gandha,
  • Mariappan Paranthaman,
  • Brian Sales,
  • Haobo Wang,
  • Adrian Dalagan,
  • Tej Lamichhane,
  • David Parker,
  • Ikenna Nlebedim
Kinjal Gandha
Ames Laboratory

Corresponding Author:kgandha@ameslab.gov

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Mariappan Paranthaman
Oak Ridge National Laboratory
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Brian Sales
Oak Ridge National Laboratory Materials Science and Technology Division
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Haobo Wang
Oak Ridge National Laboratory Center for Nanophase Materials Sciences
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Adrian Dalagan
Oak Ridge National Laboratory Materials Science and Technology Division
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Tej Lamichhane
Oak Ridge National Laboratory Materials Science and Technology Division
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David Parker
Oak Ridge National Laboratory Materials Science and Technology Division
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Ikenna Nlebedim
Ames Laboratory
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Abstract

Fabricating a bonded magnet with a near-net shape in suitable thermoplastic polymer binders is of paramount importance in the development of cost-effective energy technologies. In this work, anisotropic Sm2Fe17N3 (Sm-Fe-N) bonded magnets are additively printed using Sm-Fe-N anisotropic magnetic particles in a polymeric binder polyamide-12 (PA12). The anisotropic bonded permanent magnets are fabricated by Big Area Additive Manufacturing followed by post-aligned in a magnetic field. Optimal post-alignment results in an enhanced remanence of ~ 0.68 T in PA12 reflected in a parallel-oriented (aligned) measured direction. The maximum energy product achieved for the additively printed anisotropic bonded magnet of Sm-Fe-N in PA12 polymer is 78.8 KJ m-3. Our results show advanced processing flexibility of additive manufacturing for the development of Sm-Fe-N bonded magnets in polymer media designed for applications with no critical rare earth magnets.
30 Aug 2021Submitted to Engineering Reports
01 Sep 2021Submission Checks Completed
01 Sep 2021Assigned to Editor
06 Sep 2021Reviewer(s) Assigned
29 Sep 2021Editorial Decision: Revise Major
04 Oct 20211st Revision Received
20 Oct 2021Submission Checks Completed
20 Oct 2021Assigned to Editor
21 Oct 2021Reviewer(s) Assigned
25 Oct 2021Editorial Decision: Accept