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Title: Continuous 3D printing of microstructured multifunctional materials
Authors: Guan, Lizhi
Fan, Jingbo
Chan, Xin Ying
Le Ferrand, Hortense
Keywords: Engineering::Manufacturing
Engineering::Materials::Composite materials
Issue Date: 2023
Source: Guan, L., Fan, J., Chan, X. Y. & Le Ferrand, H. (2023). Continuous 3D printing of microstructured multifunctional materials. Additive Manufacturing, 62, 103373-.
Project: NRFF12 2020-0002 
Journal: Additive Manufacturing 
Abstract: Microstructured materials are promising for achieving as-designed local properties, enhanced global properties, and multifunctionality. Here, we developed an extrusion-based 3D printing method called magnetic direct ink writing (M-DIW), that continuously printed materials with local orientation of 2D microparticles at high concentration, using magnetic fields below 100 mT. The printing is enabled by carefully designing the viscosity of the inks to allow the same time extrusion and microparticle motion. This is realized by adjusting the magnetic functionalization of the microplatelets, adding a small concentration of fumed silica, and finding the optimum solid loading to obtain yield stress below 45 Pa. Proof-of-concept inks containing alumina and graphite microplatelets can be turned into a ceramic with an anisotropic flexural strength ranging 100–150 MPa after sintering, or composites with anisotropic conductivity ranging 5–25 S/m. Magnetically controlled electrical switches or self-shaping ceramics can be printed using M-DIW, for example.
ISSN: 2214-7810
DOI: 10.1016/j.addma.2022.103373
Schools: School of Mechanical and Aerospace Engineering 
School of Materials Science and Engineering 
Research Centres: Singapore Centre for 3D Printing 
Rights: © 2022 Elsevier B.V. All rights reserved. This paper was published in Additive Manufacturing and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20250202
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles
MSE Journal Articles
SC3DP Journal Articles

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