Measuring Structural Heterogeneities in Metallic Glasses Using Transmission Electron Microscopy
Measuring Structural Heterogeneities in Metallic Glasses Using Transmission Electron Microscopy
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DOI：
10.3390/met8121085
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发表时间：
2018-12
期刊：
影响因子：
2.9
通讯作者：
L. Tian;C. Volkert
中科院分区：
文献类型：
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作者：
L. Tian;C. Volkert
金属玻璃结构和性能的局部非均质性最近已被计算机模拟和实验观察到。这些非均质性对于理解金属玻璃的稳定性和性能是很重要的。在测量弹性性能和局部密度的非均质性到小于10nm的长度尺度方面取得了进展。在本文中，我们重点研究了结构和机械非均质性，重点介绍了具有优异空间分辨率，多功能检测模式和原位测试能力的透射电子显微镜的研究。我们认为，理解金属玻璃行为的下一个重要步骤在于理解各种结构和机械非均质性之间的空间和时间相关性。
Local heterogeneities in the structure and properties of metallic glasses have recently been predicted by computer simulations and also observed in experiments. These heterogeneities are important in understanding the stability and performance of metallic glasses. Progress has been made in measuring heterogeneities in elastic properties and local density down to length scales of less than 10 nm. In this review, we focus on studies of structural and mechanical heterogeneities with emphasis on those achieved by transmission electron microscopy which has an excellent spatial resolution, multifunctional detection modes, as well as in-situ testing capabilities. We argue that the next important step in understanding the behavior of metallic glasses lies in understanding the spatial and temporal correlations between the various structural and mechanical heterogeneities.