@article{Zhou:2023:10.1016/j.actamat.2023.118704,
author = {Zhou, S and Cai, Q and Tirichenko, IS and Vilchez, V and Gavalda-Diaz, O and Bouville, F and Saiz, E},
doi = {10.1016/j.actamat.2023.118704},
journal = {Acta Materialia},
title = {Additive manufacturing of Al2O3 with engineered interlayers and high toughness through multi-material co-extrusion},
url = {http://dx.doi.org/10.1016/j.actamat.2023.118704},
volume = {246},
year = {2023}
}

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TY  - JOUR
AB  - The additive manufacturing of ceramic composites with tailored microstructures is still challenging and timeconsuming. However, there is great interest as it may enable the implementation of novel materials architectures following computer designs. In this work, we demonstrate a straightforward method to obtain ceramicswith a network of continuous weak interlayers designed to increase fracture resistance using alumina as a modelsystem. This is achieved by combining direct ink writing with the coextrusion of multi-material pastes withcarefully matched rheology based on thermally reversible hydrogels and inorganic powders. The printed Al2O3bars with and without weak interlayers exhibit strengths ranging between 180 and 360 MPa and KIC ~ 3MPa•m1/2. The introduction of weak interlayers using different raster patterns, such as length wise and Bouligand alignments can be used to direct crack propagation and promote gradual failure. The result is animprovement in the fracture energy up to 230 J/m2 and KJ up to 9 MPa⋅m1/2. These results suggest the potentialof manufacturing ceramics with enhanced mechanical properties by using robocasting with multi-material inksto engineer complex interlayer networks.
AU  - Zhou,S
AU  - Cai,Q
AU  - Tirichenko,IS
AU  - Vilchez,V
AU  - Gavalda-Diaz,O
AU  - Bouville,F
AU  - Saiz,E
DO  - 10.1016/j.actamat.2023.118704
PY  - 2023///
SN  - 1359-6454
TI  - Additive manufacturing of Al2O3 with engineered interlayers and high toughness through multi-material co-extrusion
T2  - Acta Materialia
UR  - http://dx.doi.org/10.1016/j.actamat.2023.118704
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000927424100001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR  - https://www.sciencedirect.com/science/article/pii/S1359645423000368
UR  - http://hdl.handle.net/10044/1/109204
VL  - 246
ER  - 

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