3D Printing of ABS Barium Ferrite Composites

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.

Effect of silane coupling on the properties of polylactic acid/barium ferrite magnetic composite filament for the 3D printing process

“…This can be observed in SEM analysis. Similar results were also found in the research of Hanemann et al (2020) who found that BaFe 12 O 19 particles acting as discontinuities in the ABS matrix generated defects, such as voids within one layer as well as between layers and delamination of printed layers in the specimen during the printing process 13 . The tensile strength of PLA‐Si‐10, PLA‐Si‐20, PLA‐Si‐30, and PLA‐Si‐40 was 20.82, 24.82, 21.83, and 15.71 MPa, respectively.…”

Development of a Multi-Material Stereolithography 3D Printing Device

“…In general, an increase in the curing time should enhance the mechanical properties, for instance, due to a better intermixture accompanied with an enhanced polymer chain entanglement. Unfortunately, a clear correlation between curing time and mechanical properties cannot be found here, which may be attributed to the layer-by-layer fabrication process generating defects, as is prominently known for FFF printing [31]. A closer look at the fracture images after tensile testing verifies this possible explanation for the observed data scattering (Figure 13).…”

“…The use of functional composites, e.g., with dielectric or magnetic properties for the realization of ceramic or metallic parts, requires additional melt-compounding steps such as mixing-kneading and filament extrusion [8,9,11,31]. Due to the round filament shape and its deposition in a layer-by-layer manner, poor inter-layer adhesion within one component is one of the major drawbacks of single-material [31] and two-component FFF printing [32]. Commercial multi-component 3D InkJet printers are available at prices upwards of €30,000, enabling geometric resolutions better than 50 µm in x-, y-and z-directions.…”

Compounding a High Dielectric Constant Thermoplastic Material for Production of Microwave Photonic Crystals through Additive Manufacturing

“…A screw feeder (Schenck process Mechatron Coin-Flex Screw Feeder) allowed precise control of the material supply to the throat of the twin screw extruder. This setup was selected due to the enhanced mixing capabilities of the twin screw system over a traditional single screw setup, rooted in higher overall shear forces that allow deagglomerating the particles of the filler [17].…”