Volume 105, Number 3, February 2014
|Number of page(s)||6|
|Section||Interdisciplinary Physics and Related Areas of Science and Technology|
|Published online||27 February 2014|
Structural anisotropy of directionally dried colloids
1 FAST, UPMC, Univ Paris-Sud, CNRS UMR 7608 - F-91405, Orsay, France
2 Physique des Solides, CNRS UMR 8502, Univ Paris-Sud - F-91405 Orsay, France
3 DS/LSS Group, Institut Laue-Langevin - BP156, F-38042 Grenoble Cedex 9, France
4 ESRF - BP 220, F-38043 Grenoble, France
5 PMMH, CNRS UMR 7636, ESPCI - 10 rue Vauquelin, F-75231 Paris Cedex 05, France
6 Max Planck Institute for Dynamics and Self- Organization (MPIDS) - D-37077 Göttingen, Germany
Received: 30 November 2013
Accepted: 28 January 2014
Aqueous colloidal dispersions of silica particles become anisotropic when they are dried through evaporation. This anisotropy is generated by a uniaxial strain of the liquid dispersions as they are compressed by the flow of water toward a solidification front. Part of the strain produced by the compression is relaxed, and part of it is stored and transferred to the solid. This stored elastic strain has consequences for the properties of the solid, where it may facilitate the growth of shear bands, and generate birefringence.
PACS: 82.70.Dd – Colloids / 64.70.D- – Solid-liquid transitions / 81.30.-t – Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
© EPLA, 2014
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