Digital light processing (DLP) is regarded as one of the most promising 3D printing technologies to process ceramics, however the precise composition of the slurry and the optimisation of the debinding process are still challenges that need to be overcome. In this work, both the dispersion and rheological behaviour of the zirconia slurry were studied using rheometery and UV-vis spectroscopy, and optimising the dispersant concentration was found to have significant benefits. Zirconia green parts were fabricated with zirconia slurry based on DLP technology, which exhibited good dimensional resolution under an exposure energy dose of 15 mJ cm-2. In addition, the debinding process was studied using TGA and an optimised approach was designed and developed. Dye penetration and SEM results showed that debinding under argon, rather than flowing air, could lead to crack-free parts at heating rates of either 0.2 or 0.5 °C min-1, though the former yielded slightly better results overall.
|Number of pages||8|
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - Dec 2020|
Bibliographical noteFunding Information:
This work was financially supported by the Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials [Grant No. ZDSYS201703031748354 ], and the Guangdong Province International Collaboration Programme [Grant No. 2019A050510003 ].
The authors would like to thank Ji Zou, Tailin Zhang, Matt Porter, Tamana Murthy and Ben Baker at the University of Birmingham for their assistance. This work was financially supported by the Shenzhen Key Laboratory for Additive Manufacturing of High-performance Materials [Grant No. ZDSYS201703031748354], and the Guangdong Province International Collaboration Programme [Grant No. 2019A050510003].
Copyright 2020 Elsevier B.V., All rights reserved.
- Digital light processing
- thermal debinding
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry