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

Journal Article · · Engineering Reports
DOI: https://doi.org/10.1002/eng2.12478 · OSTI ID:1831290
ORCiD logo [1]; ORCiD logo [2];  [2];  [3];  [2];  [2];  [2];  [1]
  1. Ames Lab., Ames, IA (United States). Critical Materials Inst.
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States). Bredesen Center for Interdisciplinary Research and Graduate Education

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 SmFeN anisotropic magnetic particles in a polymeric binder polyamide-12 (PA12). The anisotropic SmFeN bonded magnets are fabricated by Big Area Additive Manufacturing followed by post-printing alignment 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 with 3D printing of the development of SmFeN nylon bonded magnets designed for applications with no critical rare earth magnets.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office; USDOE
Grant/Contract Number:
AC05‐00OR22725; AC02‐07CH11358; AC02-07CH11358; AC05-00OR22725; DE‐AC05‐00OR22725; DE‐AC02‐07CH11358
OSTI ID:
1831290
Alternate ID(s):
OSTI ID: 1827091; OSTI ID: 1831292; OSTI ID: 1833002; OSTI ID: 1883677; OSTI ID: 1994746
Report Number(s):
IS-J-10,660; IS-J-10,600
Journal Information:
Engineering Reports, Vol. 3, Issue 12; ISSN 2577-8196
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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