TY - JOUR

T1 - Polymer-bonded anisotropic SrFe12O19 filaments for fused filament fabrication

AU - Huber, Christian

AU - Cano Cano, Santiago

AU - Teliban, Iulian

AU - Schuschnigg, Stephan

AU - Groenefeld, Martin

AU - Suess, DIeter

N1 - Publisher Copyright: © 2020 Author(s).

PY - 2020/2/12

Y1 - 2020/2/12

N2 - In this publication, we describe the extrusion process and the properties of polymer-bonded anisotropic SrFe12O19filaments for fused filament fabrication (FFF). Highly filled polyamide 12 filaments with a filling fraction from 40 vol. % to 55 vol. % are mixed and extruded into filaments with a diameter of 1.75 mm. Such filaments are processable with a conventional FFF 3D printer. No modifications of the 3D printer are necessary. Detailed mechanical and magnetic investigations of printed samples are performed and discussed. In the presence of an external alignment field, the Sr ferrite particles inside the PA12 matrix can be aligned along an external magnetic field. The remanence can be increased by 40% by printing anisotropic structures. For the 55 vol. % filled filament, a remanence of 212.8 mT and a coercivity of 307.4 mT are measured. The capabilities of printing magnetic anisotropic structures in a complex external field are presented with a Halbach-array arrangement. With the aim of an inverse field model, based on a finite element method, the orientation of the particles and the quality of the print can be estimated by a nondestructive method.

AB - In this publication, we describe the extrusion process and the properties of polymer-bonded anisotropic SrFe12O19filaments for fused filament fabrication (FFF). Highly filled polyamide 12 filaments with a filling fraction from 40 vol. % to 55 vol. % are mixed and extruded into filaments with a diameter of 1.75 mm. Such filaments are processable with a conventional FFF 3D printer. No modifications of the 3D printer are necessary. Detailed mechanical and magnetic investigations of printed samples are performed and discussed. In the presence of an external alignment field, the Sr ferrite particles inside the PA12 matrix can be aligned along an external magnetic field. The remanence can be increased by 40% by printing anisotropic structures. For the 55 vol. % filled filament, a remanence of 212.8 mT and a coercivity of 307.4 mT are measured. The capabilities of printing magnetic anisotropic structures in a complex external field are presented with a Halbach-array arrangement. With the aim of an inverse field model, based on a finite element method, the orientation of the particles and the quality of the print can be estimated by a nondestructive method.

KW - Kunststoffgebundene Magnete, Strontiumferrit

UR - http://www.scopus.com/inward/record.url?scp=85079676429&partnerID=8YFLogxK

U2 - 10.1063/1.5139493

DO - 10.1063/1.5139493

M3 - Article

VL - 127.2020

JO - Journal of applied physics

JF - Journal of applied physics

SN - 0021-8979

IS - 6

M1 - 063904

ER -