Lim, Ignatius Y. and Ting, C. H. and Ng, C. K. and Tey, J. Y. and Yeo, W. H. and Ramesh, S. and Lee, K. Y. Sara and Chuah, Y. D. and Teng, W. D. (2023) 3D printing of high solid loading zirconia feedstock via screw-based material extrusion. Ceramics International, 49 (15). pp. 24852-24860. ISSN 0272-8842, DOI https://doi.org/10.1016/j.ceramint.2023.05.011.
Full text not available from this repository.Abstract
Zirconia ceramic (3Y-TZP) feedstocks with solid loadings from 50 vol% to 68 vol%, in a 60:40 paraffin wax to LDPE ratio binder system, were prepared and printed using a screw-based material extrusion printer. A two-step debinding process involving solvent debinding (cyclohexane + ethanol) and thermal debinding (140 degrees C-600 degrees C at 0.2 degrees C/min) followed by sintering at 1500 degrees C for 2 h was employed. Tests performed include TGA, density test, Vickers hardness and fracture toughness, XRD, and SEM. The TGA result showed two significant drops in weight starting at 180 degrees C and 380 degrees C, which corresponds to the decomposition of paraffin wax and LDPE, respectively. A minimum of 40 wt% of soluble binder was removed from the green sample after solvent immersion for 3 h at 40 degrees C for solid loadings & GE;55 vol%. High solid loading feedstocks produced samples with comparable density, Vickers hardness and fracture toughness, which are 97.5%,-12.3 GPa, and-5.5 MPa m1/2, respectively; while XRD and SEM shows no adverse tetragonal to monoclinic phase transformation and grain growth, respectively. This study demonstrates that 3D printing of granular 3Y-TZP ceramic feedstock via screw-based material extrusion technique is feasible even with high solid loadings, which is usually difficult to fabricate into flexible filaments and print due to high viscosity.
| Item Type: | Article |
|---|---|
| Funders: | UTAR Research Fund [Grant No: IPSR/RMC/UTARRF/2021-C1/T08], Universiti Tunku Abdul Rahman, Tunku Abdul Rahman University of Management and Technology |
| Uncontrolled Keywords: | Additive manufacturing; ZrO 2 feedstock; Mechanical properties; Debinding defects |
| Subjects: | Q Science > Q Science (General) T Technology > T Technology (General) |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 07 Oct 2025 07:32 |
| Last Modified: | 07 Oct 2025 07:32 |
| URI: | http://eprints.um.edu.my/id/eprint/48240 |
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