Khatri Bilal, Lappe Karl, Noetzel Dorit, Pursche Kilian, Hanemann Thomas
Laboratory for Materials Processing, University of Freiburg, 79110 Freiburg, Germany.
Karlsruhe Institute of Technology, Institute of Applied Materials, 76344 Karlsruhe, Germany.
Materials (Basel). 2018 Jan 25;11(2):189. doi: 10.3390/ma11020189.
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.
在这项工作中，开发了一种3D打印的聚合物-金属软磁复合材料，并对其材料、结构和功能特性进行了表征。该材料以丙烯腈-丁二烯-苯乙烯（ABS）为聚合物基体，填充高达40体积%的不锈钢微粉。对复合材料进行了流变学分析，并使用商用桌面3D打印机将其3D打印成拉伸和弯曲测试样品。力学表征显示，随着填料含量的增加，极限抗拉强度（UTS）呈线性下降趋势，杨氏模量急剧下降。四点弯曲分析表明，复合材料的弯曲强度下降高达70%，割线弹性模量增加高达两倍。磁滞表征显示，在485 kA/m的外加磁场下，剩余磁感应强度高达15.6 mT，矫顽力高达4.31 kA/m。该复合材料有望成为用于增材制造无源磁传感器和/或致动器的材料。
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