doi: 10.3850/978-981-11-0749-8_710
Development and Characterization of Functional Polymer-Ceramic Composite Structures Using Fused Deposition Modeling
Bilal Khatri1, Karl Lappe1, Mathis Habedank1, Tobias Mueller2, Christof Megnin1 and Thomas Hanemann1,2
1University of Freiburg, IMTEK, Laboratory of Materials Processing, Freiburg, Germany
2Karlsruhe Institute of Technology, Institute for Applied Materials - Materials Science and Engineering, Karlsruhe, Germany
Abstract
We present a process flow for the development of functional polymer-ceramic composite filaments and test structures using the fused deposition modeling (FDM) 3D printing process. Thermoplast-ceramic composites were developed using acrylonitrile butadiene styrene (ABS) as the polymer matrix, filled with volumetric ratios of 10- and 20% barium titanate (BaTiO3) microparticles. These composites were rheologically and thermogravimetrically analyzed and structured into structural and functional test specimens using a commercially available FDM 3D printer. Structural characterization of the composites revealed exceedingly brittle behavior with increasing filler content, with the ultimate tensile strength falling from 32.7 MPa for pure ABS to 21.3MPa for the ABS- 20 vol. % BaTiO3 composite. Functional characterization revealed an increase in the dielectric constant from 3.2 to 6.8 with increasing BaTiO3 content. The ABS-BaTiO3 composites show promise as functional dielectric layers that can be printed using a well-established and cost-effective rapid prototyping method. Further analysis of the filler particle distribution and increase of filler ratios is ongoing, leading to the possibility of obtaining pure dielectric layers and structures after sintering.
Keywords: Rapid prototyping, Polymer-ceramic composite, Fused deposition modeling, Thermogravimetry, Rheology, Mechanical characterization, Dielectric characterization.
