Robocasting of structural ceramic parts with hydrogel inks
File(s)
Accepted version
Author(s)
Feilden, E
Garcia Tunon Blanca, E
Giuliani, F
Saiz Gutierrez, E
Vandeperre, LJM
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.
Date Issued
2016-08-01
Date Acceptance
2016-03-04
Citation
Journal of the European Ceramic Society, 2016, 36 (10), pp.2525-2533
ISSN
0955-2219
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 http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
https://www.sciencedirect.com/science/article/pii/S0955221916301054
Subjects
Science & Technology
Technology
Materials Science, Ceramics
Materials Science
Additive manufacturing
3D printing
Robocasting
Ceramics
Rheology
MECHANICAL-PROPERTIES
SCAFFOLDS
BEHAVIOR
FLOW
0912 Materials Engineering
Materials
Publication Status
Published
Coverage Spatial
United Kingdom
Date Publish Online
2016-03-15