Journal
MATERIALS
Volume 11, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/ma11020189
Keywords
polymer-metal composite; 3D printing; fused deposition modeling; material characterization; mechanical characterization; magnetic characterization
Categories
Funding
- Internationale Graduiertenakademie at the University of Freiburg
- German Research foundation (DFG) [HA 1924/17-1]
- German Research Foundation (DFG)
- University of Freiburg
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In this work, a 3D printed polymer-metal soft-magnetic composite was developed and characterized for its material, structural, and functional properties. The material comprises acrylonitrile butadiene styrene (ABS) as the polymer matrix, with up to 40 vol. % stainless steel micropowder as the filler. The composites were rheologically analyzed and 3D printed into tensile and flexural test specimens using a commercial desktop 3D printer. Mechanical characterization revealed a linearly decreasing trend of the ultimate tensile strength (UTS) and a sharp decrease in Young's modulus with increasing filler content. Four-point bending analysis showed a decrease of up to 70% in the flexural strength of the composite and up to a two-factor increase in the secant modulus of elasticity. Magnetic hysteresis characterization revealed retentivities of up to 15.6 mT and coercive forces of up to 4.31 kA/m at an applied magnetic field of 485 kA/m. The composite shows promise as a material for the additive manufacturing of passive magnetic sensors and/or actuators.
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