Evidence of a sponge-to-lamellar phase transition under shear by X-ray scattering experiments in a Couette cell

被引:57
作者
Mahjoub, HF
Bourgaux, C
Serot, P
Kleman, M
机构
[1] Univ Paris 06, LMCP, F-75252 Paris 05, France
[2] Ctr Univ Orsay, LURE, F-91405 Orsay, France
[3] Ecole Super Phys & Chim Ind Ville Paris, F-75005 Paris, France
关键词
D O I
10.1103/PhysRevLett.81.2076
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The L(3) sponge phase under shear in a Couette cell is totally transformed to a lamellar phase L(alpha) above some critical shear rate (gamma) over dot (c). In situ x-ray scattering and simultaneous light microscopy observations show that the first nuclei of the L(alpha) phase appear at a low critical shear rate (gamma) over dot (a) and that the orientation of the lamellae in the L(alpha) phase tilts over from a so-called "a" orientation to a "c" orientation at (gamma) over dot (c). In the regime with two phases (gamma) over dot (a) and (gamma) over dot (c), the phases are in an epitaxial relationship immediately after the shear is removed.
引用
收藏
页码:2076 / 2079
页数:4
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