Rheology and printability of alumina-toughened zirconia pastes for high-density strong parts via direct ink writing
Göksel B, Schulte NA, Kovač M, Koos E, Van Meerbeek B, Vleugels J, Braem A (2024)
Publication Type: Journal article
Publication year: 2024
Journal
Book Volume: 44
Pages Range: 6565-6575
Journal Issue: 11
DOI: 10.1016/j.jeurceramsoc.2024.04.031
Abstract
Direct ink writing (DIW) is a promising additive manufacturing technique for fabricating structural ceramics, including alumina-toughened zirconia (ATZ), heavily reliant on the rheological properties of the paste. The rheological properties of aqueous ATZ pastes with 25 wt% Pluronic® F127 hydrogel and solid loadings of 28–44 vol% were investigated, complemented by characterization of the parts, including relative density and shrinkage measurements, to assess the printability. The 42 vol% paste was identified as most suitable for producing high-density parts with minimal shrinkage. A controlled drying process gradually decreased humidity from 90% to 30% while raising temperature from 25 to 60°C over 4 days to prevent drying defects. Mechanical testing showed DIW-printed high-density (97.2±2.2%) parts with a mean flexural strength of 670±270 MPa, Vickers hardness of 13.6±2.8 GPa, and fracture resistance of 4.4±0.2 MPa, highlighting the potential for DIW to create high-density ATZ ceramic parts with favorable mechanical properties.
Involved external institutions
Belgium (BE)How to cite
APA:
Göksel, B., Schulte, N.A., Kovač, M., Koos, E., Van Meerbeek, B., Vleugels, J., & Braem, A. (2024). Rheology and printability of alumina-toughened zirconia pastes for high-density strong parts via direct ink writing. Journal of the European Ceramic Society, 44(11), 6565-6575. https://doi.org/10.1016/j.jeurceramsoc.2024.04.031
MLA:
Göksel, Berfu, et al. "Rheology and printability of alumina-toughened zirconia pastes for high-density strong parts via direct ink writing." Journal of the European Ceramic Society 44.11 (2024): 6565-6575.
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