3D printing of anisotropic Sm–Fe–N nylon bonded permanent magnets

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2021-11-17
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Gandha, Kinjal
Paranthaman, M. P.
Sales, Brian C.
Wang, Haobo
Dalagan, Adrian
Lamichhane, Tej N.
Parker, David S.
Nlebedim, Ikenna C.
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Iowa State University Digital Repository, Ames IA (United States)
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Ames National Laboratory
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). Here, 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.
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This article is published as Gandha, Kinjal, M. P. Paranthaman, Brian C. Sales, Haobo Wang, Adrian Dalagan, Tej N. Lamichhane, David S. Parker, and Ikenna C. Nlebedim. "3D printing of anisotropic Sm–Fe–N nylon bonded permanent magnets." Engineering Reports 3, no. 12 (2021): e12478. DOI: 10.1002/eng2.12478. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. This article is a U.S. Government work and is in the public domain in the USA. DOE Contract Number(s): AC05‐00OR22725; AC02‐07CH11358; AC02-07CH11358; AC05-00OR22725; AC05‐00OR22725; AC02‐07CH11358. Posted with permission.
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