Impact of �core-shell� mode of printing on properties of 3D binderjet printed zirconia-alumina based bioceramics

Barui, S and Chowdhury, S and Samajdar, R and Chakraborty, S and Gavade, M and Basu, B (2020) Impact of �core-shell� mode of printing on properties of 3D binderjet printed zirconia-alumina based bioceramics. In: Open Ceramics, 3 .

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Abstract

3D binderjet printing of bioceramics remained a major challenge, and powder specific-binder development and processing strategies still follow certain �black box� approaches. In this study, for the first time, we report the efficacy of an acrylic based proprietary binder system to 3D print zirconia based bioceramics. Machine limited �core-shell� mode of binder deposition resulted in heterogeneous distribution in particle arrangement from �shell� to �core�, with higher binder saturation at the �shell� region and less saturation at the �core�. A series of post-processing strategies like �presintering � salt infiltration � phase conversion � final sintering�, post-printing binder infiltration etc. were adapted to develop 3YSZ alone or together with ZrSiO4 or Al2O3, although with limited success. Despite poor strength properties (compressive/tensile/flexural), the acceptable strength reliability with modest Weibull modulus (m �� �5�9) was obtained in post-processed ceramics. While explaining the microstructure-property correlations, the contributions of different powder modification strategies and novel processing steps (�dual powder deposition� for non-macroporous powder bed) are discussed in particular reference to the porous architecture formed in 2D space or 3D volume, as investigated using SEM or micro-computed tomography. © 2020 The Authors

Item Type:	Journal Article
Publication:	Open Ceramics
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Authors
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering
Date Deposited:	18 Aug 2021 09:30
Last Modified:	18 Aug 2021 09:30
URI:	http://eprints.iisc.ac.in/id/eprint/69283

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