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Investigation of droplet deposition for suspensions usable for Thermoplastic 3D Printing (T3DP)

: Scheithauer, Uwe; Johne-Michaelis, Robert; Weingarten, Steven; Schwarzer, Eric; Richter, Hans-Jürgen; Moritz, Tassilo; Michaelis, Alexander


Journal of materials engineering and performance 27 (2018), No.1, pp.44-51
ISSN: 1059-9495
European Commission EC
H2020; 678503; CerAMfacturing
Development of ceramic and multi material components by additive manufacturing methods for personalized medical products
Journal Article
Fraunhofer IKTS ()
Additive Fertigung; Thermoplastischer 3D-Druck; Keramik; Zirkonoxid; Tropfenbildung; Filamentbildungsfaktor; Additive manufacturing; thermoplastic 3D printing; Ceramic; Zirconia; Droplet formation; Droplet fusion factor; CerAMfacturing

Thermoplastic 3D printing (T3DP) is an Additive Manufacturing (AM) technology, which can be used for the production of dense single- and especially multi-materialcomponents. This becomes possible because of the combination of the precise deposition of small droplets of molten thermoplastic suspensions containing ceramic or metal particles and a curing mechanism caused on cool down increasing the viscosity. In this paper the droplet formation behavior of zirconia suspensions for T3DP (82 wt.-% and 84 wt.-%) was investigated. The droplet fusion factor (dff) is introduced to calculate the necessary distance between two droplets to form filament like structures by fusion of adjacent droplets. Filament-like structures with a smooth surface and a nearly homogeneous cross-section were manufactured for both suspensions with a dff of 44 % or less.