@article{Ferrand,
author = {Ferrand, HL and Bouville, F and Studart, AR},
title = {Design principles for textured multi-layered composites using  magnetically assisted slip casting},
url = {http://arxiv.org/abs/1808.01327v1},
}

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TY  - JOUR
AB  - In many natural multi-layered composites, such as in the dactyl club ofStomatopods or the shell of bivalve mollusks, the defining functional andstructural properties are determined by locally varying orientations ofinorganic building blocks within each layer. One approach to artificiallyproduce textured microstructures inspired by such complex composites ismagnetically assisted slip-casting (MASC). MASC is a colloidal process in whichanisotropic particles are oriented at arbitrarily defined angles using amagnetic field. The orientation of the particles is maintained during growth asparticles are collected from the wall of a porous mold. Whereas a number ofproof-of-concept studies have established the potential of the technique, thefull design space available for MASC-fabricated structures, and the limits ofthe approach, have so far not been explored in a systematic manner. To fillthis gap, we have studied both theoretically and experimentally the varioustorques that act on the particles at different stage of the assembly process.We define the boundary conditions of the MASC process for magneticallyresponsive alumina platelets suspended in a low-viscosity aqueous suspension,considering the composition of the colloidal suspension and the dynamics of theparticle-alignment process under a rotating magnetic field. Taken together,these findings define a design strategy for the fabrication of designedmulti-lamellar microstructures using MASC. Our guidelines are based on acomprehensive understanding of the physical mechanisms governing theorientation and assembly of anisotropic particles during MASC and indicate aroute to expanding this technique to building blocks of various chemistries,and thus to broadening the range of bio-inspired composites with customizedmulti-scale structures that can be produced for specific applications.
AU  - Ferrand,HL
AU  - Bouville,F
AU  - Studart,AR
TI  - Design principles for textured multi-layered composites using  magnetically assisted slip casting
UR  - http://arxiv.org/abs/1808.01327v1
ER  - 

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