Abstract
In this work, a process for the realization of new polymer matrix composites with nanosized barium ferrite (BaFe12O19) as ferrimagnetic filler, acryl butadiene styrene (ABS) as polymer matrix and an extrusion-based method, namely fused filament fabrication (FFF), as 3D printing method will be described comprehensively. The whole process consists of the individual steps material compounding, rheological testing, filament extrusion, 3D-printing via FFF and finally a widespread specimen characterization regarding to appearance, mechanical properties like tensile and bending behavior as well as the aspired magnetic properties. Increasing ferrite amounts up to 40 vol.% (equal 76 wt.%) cause a reduction of the ultimate stress and an increase of the magnetic polarization as well as of the energy product (BH)max in comparison to the pure polymer matrix. In addition, an extensive discussion of typical printing defects and their consequences on the device properties will be undertaken.
Highlights
The different variants of additive manufacturing, or more popular named 3D printing, allows, nowadays, the realization of parts with geometrical features, which cannot be produced by applying classical or established fabrication methods
Material extrusion-based methods are very popular, especially fused filament fabrication (FFF), same is valid for 3D inkjet printing, or the variants of powder based printing
Compounds consisting of acryl butadiene styrene (ABS) as polymer matrix, stearic acid as surfactant and increasing amounts of barium ferrite were prepared by a mixer-kneader with torque recording
Summary
The different variants of additive manufacturing, or more popular named 3D printing, allows, nowadays, the realization of parts with geometrical features, which cannot be produced by applying classical or established fabrication methods. In case of the extrusion-based techniques, especially FFF, recently the portfolio of applicable thermoplastics has been expanded from low and medium performance materials like polylactide (PLA) or acryl butadiene styrene (ABS) upwards to high performance polymers, like polyetheretherketone (PEEK) [6]. This is attributed to a significant progress in the accessible printer’s process parameters like maximum printing temperature up to 500 ◦ C and more. Current research focuses on the realization of multi-material printing systems and application in life science, biology and medicine [7,8,9] applying FFF and other
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