3D printing of zirconia via digital light processing: optimization of slurry and debinding process

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

External organisations

  • South University of Science and Technology of China

Abstract

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.

Bibliographic note

Funding 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 ]. Funding Information: 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]. Publisher Copyright: © 2020 Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

Details

Original languageEnglish
Pages (from-to)5837-5844
Number of pages8
JournalJournal of the European Ceramic Society
Volume40
Issue number15
Publication statusPublished - Dec 2020

Keywords

  • Digital light processing, dispersant, thermal debinding, zirconia