In situ mechanical quenching of nanoscale silica spheres in the transmission electron microscope
In situ mechanical quenching of nanoscale silica spheres in the transmission electron microscope
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DOI：
10.1016/j.scriptamat.2016.04.019
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发表时间：
2016-08-01
影响因子：
6
通讯作者：
Spiecker, E.
中科院分区：
文献类型：
--
作者：
Mackovic, M.;Niekiel, F.;Spiecker, E.
提出了一种在透射电子显微镜内进行纳米二氧化硅球原位机械淬火实验的新方法。电子辐照通过调节塑性流动来模拟温度。通过关闭电子束来实现负载下的淬火。这在不同的加载场景中使用。互补有限元法模拟强调的杨氏模量的变化，这在很大程度上取决于电子辐照和机械负载的相互作用。我们属性的减少杨氏模量压缩引起的结构各向异性，这是冻结在通过快速淬火，并提出了一个模型，结构各向异性如何在纳米二氧化硅的发展。(C)2016爱思唯尔有限公司版权所有。
A novel approach for in situ mechanical quenching experiments of nanoscale silica spheres inside the transmission electron microscope is presented. Electron irradiation is used to mimic temperature by mediating plastic flow. Quenching under load is achieved by switching-off the electron beam. This is employed in different loading scenarios. Complementary finite element method simulations underline a change of Young's modulus, which strongly depends on the interplay of electron irradiation and mechanical load. We attribute the reduction in Young's modulus to compression-induced structural anisotropy which is frozen-in by rapid quenching and propose a model on how structural anisotropy develops in nanoscale silica. (C) 2016 Elsevier Ltd. All rights reserved.