UV-Curing Assisted Direct Ink Writing of Dense, Crack-Free, and High-Performance Zirconia-Based Composites With Aligned Alumina Platelets.

Autor: Li M; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, B-3001, Belgium.; Department of Oral Health Sciences, KU Leuven, BIOMAT - Biomaterials Research group and UZ Leuven (University Hospitals Leuven), Dentistry, Kapucijnenvoer 7 block a, Leuven, B-3000, Belgium., Huang S; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, B-3001, Belgium., Willems E; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, B-3001, Belgium., Soete J; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, B-3001, Belgium., Inokoshi M; Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo, Tokyo, 113-8549, Japan., Van Meerbeek B; Department of Oral Health Sciences, KU Leuven, BIOMAT - Biomaterials Research group and UZ Leuven (University Hospitals Leuven), Dentistry, Kapucijnenvoer 7 block a, Leuven, B-3000, Belgium., Vleugels J; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, B-3001, Belgium., Zhang F; Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, Leuven, B-3001, Belgium.; Department of Oral Health Sciences, KU Leuven, BIOMAT - Biomaterials Research group and UZ Leuven (University Hospitals Leuven), Dentistry, Kapucijnenvoer 7 block a, Leuven, B-3000, Belgium.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Feb; Vol. 36 (5), pp. e2306764. Date of Electronic Publication: 2023 Dec 05.
DOI: 10.1002/adma.202306764
Abstrakt: Additive manufacturing (AM) of high-performance structural ceramic components with comparative strength and toughness as conventionally manufactured ceramics remains challenging. Here, a UV-curing approach is integrated in direct ink writing (DIW), taking advantage from DIW to enable an easy use of high solid-loading pastes and multi-layered materials with compositional changes; while, avoiding drying problems. UV-curable opaque zirconia-based slurries with a solid loading of 51 vol% are developed to fabricate dense and crack-free alumina-toughened zirconia (ATZ) containing 3 wt% alumina platelets. Importantly, a non-reactive diluent is added to relieve polymerization-induced internal stresses, avoid subsequent warping and cracking, and facilitate the de-binding. For the first time, UV-curing assisted DIW-printed ceramic after sintering reveals even better mechanical properties than that processed by a conventional pressing. This is attributed to the aligned alumina platelets, enhancing crack deflection and improving the fracture toughness from 6.8 ± 0.3 MPa m 0.5 (compacted) to 7.4 ± 0.3 MPa m 0.5 (DIW). The four-point bending strength of the DIW ATZ (1009 ± 93 MPa) is also higher than that of the conventionally manufactured equivalent (861 ± 68 MPa). Besides homogeneous ceramic, laminate structures are demonstrated. This work provides a valuable hybrid approach to additively manufacture tough and strong ceramic components.
(© 2023 Wiley-VCH GmbH.)
Databáze: MEDLINE
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