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Correlation between structural relaxation and connectivity of icosahedral clusters in CuZr metallic glass-forming liquids

机译：CuZr金属玻璃形成液中二十面体簇的结构弛豫与连通性之间的相关性

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摘要

The correlation between structural relaxation and the medium-range structures formed by icosahedral cluster packing in CuZr supercooled metallic glass-forming liquids was studied via molecular dynamics simulations. We find that compared to the amount of icosahedral clusters, the medium-range structures formed by icosahedral cluster packing play more important and controlling roles in the structural relaxation process of the supercooled liquids. The relaxation times of local structures depend exponentially on the connectivity of local structures. Despite the argument whether there is a specific connection between the static structure and dynamic property of glass formers in particle level, it does exist on larger length scale. Our results demonstrate that dynamical heterogeneity is indeed correlated with the medium-range static atomic structures in the supercooled glass-forming liquids.
机译：通过分子动力学模拟研究了CuZr过冷金属玻璃成液中结构松弛与二十面体簇堆积形成的中程结构的相关性。我们发现，与二十面体簇的数量相比，二十面体簇堆积形成的中程结构在过冷液体的结构弛豫过程中起着更为重要和控制的作用。局部结构的弛豫时间以指数方式取决于局部结构的连通性。尽管争论了在颗粒水平上玻璃成型机的静态结构和动态特性之间是否存在特定的联系，但它确实存在于更大的长度尺度上。我们的结果表明，动态非均质性确实与过冷玻璃形成液体中的中程静态原子结构相关。

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  • 来源
    《Physical review》 |2013年第5期|054202.1-054202.5|共5页
  • 作者

    Z. W. Wu; M. Z. Li; W. H. Wang; K. X. Liu;

  • 作者单位

    State Key Laboratory of Turbulence and Complex System and Center for Applied Physics and Technology, College of Engineering, Peking University, Beijing 100871, China;

    Department of Physics, Renmin University of China, Beijing 100872, China;

    Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;

    State Key Laboratory of Turbulence and Complex System and Center for Applied Physics and Technology, College of Engineering, Peking University, Beijing 100871, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    liquid metals and alloys; time-dependent properties; relaxation; computer simulation of liquid structure;

    机译：液态金属和合金;时间相关的属性;松弛;液体结构的计算机模拟;

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