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.