Behavior of a supercooled chalcogenide liquid in the non-Newtonian regime under steady vs. oscillatory shear

被引：14
作者：
Sen, S. [1 ]
Zhu, W. [1 ]
Aitken, B. G. [2 ]
机构：
[1] Univ Calif Davis, Dept Mat Sci & Engn, Davis, CA 95616 USA
[2] Corning Inc, Sci & Technol Div, Corning, NY 14831 USA
来源：
JOURNAL OF CHEMICAL PHYSICS | 2017年 / 147卷 / 03期
基金：
美国国家科学基金会;
关键词：
COX-MERZ RULE; GLASS-FORMING LIQUIDS; ALKALI PHOSPHATE-GLASSES; MELT RHEOLOGY; VISCOUS-FLOW; DYNAMICS; MODEL; CRYSTALLIZATION; TRANSITION; VISCOSITY;
D O I：
10.1063/1.4993780
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The steady and oscillatory shear rate dependence of viscosity of a supercooled chalcogenide liquid of composition As10Se90 is measured at Newtonian viscosities ranging between 10(3) and 10(7) Pa s using capillary and parallel plate rheometry. The liquid displays strong violation of the Cox-Merz rule in the non-Newtonian regime where the viscosity under steady shear is nearly an order of magnitude lower than that under oscillatory shear. This behavior is argued to be related to the emergence of unusually large (6-8 nm) cooperatively rearranging regions with long relaxation times in the liquid that result from significant structural rearrangements under steady shear. Published by AIP Publishing.
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页数：6
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