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3D Printing Bioinspired Ceramic Composites

DOI: 10.1038/s41598-017-14236-9 DOI Help

Authors: Ezra Feilden (Imperial College London) , Claudio Ferraro (Imperial College London) , Qinghua Zhang (Imperial College London) , Esther García-tuñón (Imperial College London; University of Liverpool) , Eleonora D'elia (Imperial College London) , Finn Giuliani (Imperial College London) , Luc Vandeperre (Imperial College London) , Eduardo Saiz (Imperial College London)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Scientific Reports , VOL 7

State: Published (Approved)
Published: October 2017

Open Access Open Access

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.

Journal Keywords: Ceramics; Composites

Subject Areas: Materials


Instruments: I13-2-Diamond Manchester Imaging

Added On: 01/11/2017 10:01

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s41598-017-14236-9.pdf

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