Universal scaling law of glass rheology
Universal scaling law of glass rheology
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DOI：
10.1038/s41563-021-01185-y
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发表时间：
2020-08
期刊：
影响因子：
41.2
通讯作者：
Shuangxi Song;F. Zhu;Mingwei Chen
中科院分区：
文献类型：
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作者：
Shuangxi Song;F. Zhu;Mingwei Chen
液体和玻璃之间原子/分子结构的相似性激发了一个长期存在的假设，即玻璃的性质可能更像流体，而不是表面上的固体。原则上，玻璃的性质可以通过其流变学在宽速率范围内的动态响应来表征，但据我们所知，这在实验上还没有实现。在这里，我们报告的动态响应的剪切应力的剪切应变率的金属玻璃超过9个数量级的时间尺度，相当于数百年，由宽带应力松弛实验。金属玻璃的动态响应，与其他“玻璃”一起，遵循流体动力学框架内的通用标度律。通用的标度律提供了全面验证的猜想上的干扰（动态）相图，其中各种各样的“玻璃”的动态行为可以统一在一个标题参数化的热力学变量的温度，体积和应力的轨迹空间。
The similarity in atomic/molecular structure between liquids and glasses has stimulated a long-standing hypothesis that the nature of glasses may be more fluid-like, rather than the apparent solid. In principle, the nature of glasses can be characterized by the dynamic response of their rheology in a wide rate range, but this has not been realized experimentally, to the best of our knowledge. Here we report the dynamic response of shear stress to the shear strain rate of metallic glasses over a timescale of nine orders of magnitude, equivalent to hundreds of years, by broadband stress relaxation experiments. The dynamic response of the metallic glasses, together with other ‘glasses’, follows a universal scaling law within the framework of fluid dynamics. The universal scaling law provides comprehensive validation of the conjecture on the jamming (dynamic) phase diagram by which the dynamic behaviours of a wide variety of ‘glasses’ can be unified under one rubric parameterized by the thermodynamic variables of temperature, volume and stress in the trajectory space.