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DOI | 10.1038/s41467-018-07814-6 |
Spatially heterogeneous dynamics in a metallic glass forming liquid imaged by electron correlation microscopy | |
Zhang, Pei1; Maldonis, Jason J.1; Liu, Ze2; Schroers, Jan2; Voyles, Paul M.1 | |
2018-03-19 | |
发表期刊 | NATURE COMMUNICATIONS
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ISSN | 2041-1723 |
出版年 | 2018 |
卷号 | 9 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Supercooled liquids exhibit spatial heterogeneity in the dynamics of their fluctuating atomic arrangements. The length and time scales of the heterogeneous dynamics are central to the glass transition and influence nucleation and growth of crystals from the liquid. Here, we report direct experimental visualization of the spatially heterogeneous dynamics as a function of temperature in the supercooled liquid state of a Pt-based metallic glass, using electron correlation microscopy with sub-nanometer resolution. An experimental four-point space-time correlation function demonstrates a growing dynamic correlation length upon cooling of the liquid toward the glass transition temperature.. as a function of the relaxation time tau are in good agreement with Adam-Gibbs theory, inhomogeneous mode-coupling theory and random first-order transition theory of the glass transition. The same experiments demonstrate the existence of a nanometer thickness near-surface layer with order of magnitude shorter relaxation time than inside the bulk. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427698200004 |
WOS关键词 | FAST SURFACE-DIFFUSION ; CORRELATION SPECTROSCOPY ; STRUCTURAL RELAXATION ; SUPERCOOLED LIQUIDS ; CRYSTAL NUCLEATION ; GROWING LENGTH ; TIME SCALES ; TRANSITION ; FLUCTUATIONS ; GROWTH |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204138 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA; 2.Yale Univ, Dept Mech Engn & Mat Sci, New Haven, CT 06511 USA |
推荐引用方式 GB/T 7714 | Zhang, Pei,Maldonis, Jason J.,Liu, Ze,et al. Spatially heterogeneous dynamics in a metallic glass forming liquid imaged by electron correlation microscopy[J]. NATURE COMMUNICATIONS,2018,9. |
APA | Zhang, Pei,Maldonis, Jason J.,Liu, Ze,Schroers, Jan,&Voyles, Paul M..(2018).Spatially heterogeneous dynamics in a metallic glass forming liquid imaged by electron correlation microscopy.NATURE COMMUNICATIONS,9. |
MLA | Zhang, Pei,et al."Spatially heterogeneous dynamics in a metallic glass forming liquid imaged by electron correlation microscopy".NATURE COMMUNICATIONS 9(2018). |
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