4.6 Article

Printing of Zirconia Parts via Fused Filament Fabrication

Journal

MATERIALS
Volume 14, Issue 19, Pages -

Publisher

MDPI
DOI: 10.3390/ma14195467

Keywords

fused filament fabrication; 3D printing; FFF/FDM; ceramics; zirconia; material extrusion; MEX

Funding

  1. German Research Foundation (DFG) [HA 1924/17-1]

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This work presents a process chain for the fabrication of dense zirconia parts, focusing on the rheological characterization of feedstock systems. The study successfully achieved dense ceramic parts with structural details smaller than 100 μm.
In this work, a process chain for the fabrication of dense zirconia parts will be presented covering the individual steps feedstock compounding, 3D printing via Fused Filament Fabrication (FFF) and thermal postprocessing including debinding and sintering. A special focus was set on the comprehensive rheological characterization of the feedstock systems applying high-pressure capillary and oscillation rheometry. The latter allowed the representation of the flow situation especially in the nozzle of the print head with the occurring low-shear stress. Oscillation rheometry enabled the clarification of the surfactant's concentration, here stearic acid, or more general, the feedstocks composition influence on the resulting feedstock flow behavior. Finally, dense ceramic parts (best values around 99 % of theory) were realized with structural details smaller than 100 mu m.

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