3D Printing Bioinspired Ceramic Composites.

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Title: 3D Printing Bioinspired Ceramic Composites.
Author(s): Feilden, E
Ferraro, C
Zhang, Q
García-Tuñón, E
D'Elia, E
Giuliani, F
Vandeperre, L
Saiz, E
Item Type: Journal Article
Abstract: Natural structural materials like bone and shell have complex, hierarchical architectures designed to control crack propagation and fracture. In modern composites there is a critical trade-off between strength and toughness. Natural structures provide blueprints to overcome this, however this approach introduces another trade-off between fine structural manipulation and manufacturing complex shapes in practical sizes and times. Here we show that robocasting can be used to build ceramic-based composite parts with a range of geometries, possessing microstructures unattainable by other production technologies. This is achieved by manipulating the rheology of ceramic pastes and the shear forces they experience during printing. To demonstrate the versatility of the approach we have fabricated highly mineralized composites with microscopic Bouligand structures that guide crack propagation and twisting in three dimensions, which we have followed using an original in-situ crack opening technique. In this way we can retain strength while enhancing toughness by using strategies taken from crustacean shells.
Publication Date: 23-Oct-2017
Date of Acceptance: 6-Oct-2017
URI: http://hdl.handle.net/10044/1/52419
DOI: https://dx.doi.org/10.1038/s41598-017-14236-9
ISSN: 2045-2322
Publisher: Nature Publishing Group
Journal / Book Title: Scientific Reports
Volume: 7
Issue: 1
Sponsor/Funder: Commission of the European Communities
Engineering & Physical Science Research Council (EPSRC)
Office Of Naval Research Global
Engineering & Physical Science Research Council (E
Funder's Grant Number: 289958
146280 MAPP - EP/P006566/1
Copyright Statement: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. © The Author(s) 2017
Publication Status: Published online
Article Number: 13759
Appears in Collections:Faculty of Engineering

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