Aging of a colloidal glass under a periodic shear.

Autor: Kaloun S; IPCMS, UMR 7504, Strasbourg, France., Skouri M, Knaebel A, Münch JP, Hébraud P
Jazyk: angličtina
Zdroj: Physical review. E, Statistical, nonlinear, and soft matter physics [Phys Rev E Stat Nonlin Soft Matter Phys] 2005 Jul; Vol. 72 (1 Pt 1), pp. 011401. Date of Electronic Publication: 2005 Jul 01.
DOI: 10.1103/PhysRevE.72.011401
Abstrakt: The aging dynamics under a periodic shear of a concentrated suspension of saponite particles is measured. It is observed that the dynamics is fastened by the application of a moderate shear amplitude. Nevertheless, this acceleration does not affect the dynamics of the suspension when the shear is ceased. By applying a succession of shear of various amplitudes, we conclude that the dynamics of the suspension at a time t(w) after complete rejuvenation is independent of the shear history between times 0 and t(w) , as soon as the amplitude of the applied shear is smaller than the characteristic shear gamma(c) necessary to completely rejuvenate the suspension.
Databáze: MEDLINE