Robocasting of Structural Ceramic Parts with Hydrogel Inks

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Title: Robocasting of Structural Ceramic Parts with Hydrogel Inks
Author(s): Feilden, E
Garcia Tunon Blanca, E
Giuliani, F
Saiz Gutierrez, E
Vandeperre, LJM
Item Type: Journal Article
Abstract: Robocasting is a 3D printing technique that may be able to achieve the much-coveted goal of reliable, complex ceramic parts with low porosity and high strength. In this work a robust hydrogel formulation was optimised for use as the extrusion paste for robocasting. The paste’s rheological properties were characterised and the printing process was optimised with the aim of attaining dense monolithic ceramic parts. The pastes exhibit a characteristic shear thinning behaviour with yield stresses that can reach values above 1 kPa and depend mostly on their solid content and the particle size distribution. It is possible to formulate printable Al2O3 and SiC inks with solid contents as high as 40 vol% that reached densities up to 95th% for SiC and 97th% for Al2O3 with flexural strengths of 300 MPa and 230 MPa respectively after sintering. The sources of strength limiting defects are identified and related to the printing process.
Publication Date: 5-Mar-2016
Date of Acceptance: 4-Mar-2016
ISSN: 1873-619X
Publisher: Elsevier
Start Page: 2525
End Page: 2533
Journal / Book Title: Journal of the European Ceramic Society
Volume: 36
Issue: 10
Copyright Statement: © 2016 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Keywords: Science & Technology
Materials Science, Ceramics
Materials Science
Additive manufacturing
3D printing
0912 Materials Engineering
Publication Status: Published
Conference Place: United Kingdom
Appears in Collections:Faculty of Engineering
Mechanical Engineering
Faculty of Natural Sciences

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