When a crack is oriented by a magnetic field.

作者: L. Pauchard , F. Elias , P. Boltenhagen , A. Cebers , J. C. Bacri

DOI: 10.1103/PHYSREVE.77.021402

关键词:

摘要: Upon drying, colloidal suspensions undergo a phase transformation from "liquid" to "gel" state. With further solvent evaporation, tensile stresses develop in the gel, which ultimately leads fractures. These generally manifest themselves regular cracking patterns reflect physical conditions of drying process. Here we show experimentally and theoretically how, case droplet magnetic colloid (ferrofluid), an externally applied field modifies stress gel therefore crack patterns. We find that analysis shape cracks allows one estimate value Young's modulus just before nucleation.

参考文章(19)
C. Jeffrey Brinker, George W. Scherer, Sol-Gel Science: The Physics and Chemistry of Sol-Gel Processing ,(1990)
Lev Davidovich Landau, Evgenii Mikhailovich Lifshitz, Theory of elasticity ,(1951)
H. Colina, S. Roux, Experimental model of cracking induced by drying shrinkage European Physical Journal E. ,vol. 1, pp. 189- 194 ,(2000) , 10.1007/S101890050021
A. Toussaint, Influence of pigmentation on the mechanical properties of paint films Progress in Organic Coatings. ,vol. 2, pp. 237- 267 ,(1974) , 10.1016/0300-9440(74)80004-4
A. Atkinson, R. M. Guppy, Mechanical stability of sol-gel films Journal of Materials Science. ,vol. 26, pp. 3869- 3873 ,(1991) , 10.1007/BF01184984
A Groisman, E Kaplan, An Experimental Study of Cracking Induced by Desiccation EPL. ,vol. 25, pp. 415- 420 ,(1994) , 10.1209/0295-5075/25/6/004
C. Allain, L. Limat, REGULAR PATTERNS OF CRACKS FORMED BY DIRECTIONAL DRYING OF A COLLODIAL SUSPENSION Physical Review Letters. ,vol. 74, pp. 2981- 2984 ,(1995) , 10.1103/PHYSREVLETT.74.2981
L. Pauchard, F. Parisse, C. Allain, Influence of salt content on crack patterns formed through colloidal suspension desiccation Physical Review E. ,vol. 59, pp. 3737- 3740 ,(1999) , 10.1103/PHYSREVE.59.3737
E. R. Dufresne, E. I. Corwin, N. A. Greenblatt, J. Ashmore, D. Y. Wang, A. D. Dinsmore, J. X. Cheng, X. S. Xie, J. W. Hutchinson, D. A. Weitz, Flow and fracture in drying nanoparticle suspensions Physical Review Letters. ,vol. 91, pp. 224501- 224501 ,(2003) , 10.1103/PHYSREVLETT.91.224501
A. Yuse, M. Sano, Transition between crack patterns in quenched glass plates. Nature. ,vol. 362, pp. 329- 331 ,(1993) , 10.1038/362329A0