Characterization of zirconia specimens fabricated by ceramic on-demand extrusion. Issue 11 (1st August 2018)

• Record Type: Journal Article
• Authors: Li, Wenbin; Ghazanfari, Amir; McMillen, Devin; Leu, Ming C.; Hilmas, Gregory E.; Watts, Jeremy
• Is Part Of: Ceramics international. Volume 44:Issue 11(2018)
• Page Start: 12245
• Page End: 12252
• Publication Date: 2018-08-01
• Subjects: Additive manufacturing -- ZrO2 -- Mechanical property -- Surface roughness; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.04.008
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The Ceramic On-Demand Extrusion (CODE) process is a novel additive manufacturing method for fabricating dense (~99% of theoretical density) ceramic components from aqueous, high solids loading pastes (>50 vol%). In this study, 3 mol% Y2 O3 stabilized zirconia (3YSZ) specimens were fabricated using the CODE process. The specimens were then dried in a humidity-controlled environmental chamber and afterwards sintered under atmospheric conditions. Mechanical properties of the sintered specimens were examined using ASTM standard test techniques, including density, Young's modulus, flexural strength, Weibull modulus, fracture toughness, and Vickers hardness. The microstructure was analyzed and grain size measured using scanning electron microscopy. The results were compared with those from Direct Inkjet Printing, Selective Laser Sintering, Lithography-based Ceramic Manufacturing (LCM), and other extrusion-based processes, and indicated that zirconia specimens produced by CODE exhibit superior mechanical properties among the additive manufacturing processes. Several sample components were produced to demonstrate CODE's capability for fabricating geometrically complex ceramic components. The surface roughness of these components was also examined.