Viscoelasticity-induced structure anisotropy in amorphous materials
Viscoelasticity-induced structure anisotropy in amorphous materials
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DOI：
10.1016/j.scriptamat.2022.115062
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发表时间：
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影响因子：
6
通讯作者：
Ruixin Sheng;Z. An;Andrew Chihpin Chuang;Xie Xie-Xie;P. Liaw;Y. Tong
中科院分区：
文献类型：
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作者：
Ruixin Sheng;Z. An;Andrew Chihpin Chuang;Xie Xie-Xie;P. Liaw;Y. Tong
使用同步加速器 X 射线衍射研究了 Zr55Cu30Ni5Al10 金属玻璃 (Zr-MG) 和非晶硒 (a-Se) 中粘弹性引起的结构变化。通过分析二维衍射图，揭示了两种类型的结构各向异性，其特征是衍射环的残余弹性应变或不均匀强度。结构各向异性的起源归因于Zr-MG中的拓扑重排和a-Se中的构象重排。我们的研究结果为广泛应用于不同非晶材料的现象学无结构变形缺陷带来了结构特性。
Viscoelasticity-induced structural change in Zr55Cu30Ni5Al10metallic glass (Zr-MG) and amorphous selenium (a-Se) is investigated using synchrotron X-ray diffraction. By analyzing the two-dimensional diffraction pattern, two types of structural anisotropy with the feature of the residual elastic strain or heterogeneous intensity of diffraction rings are revealed. The origin of the structural anisotropy is attributed to the topological rearrangement in the Zr-MG and conformation rearrangement in the a-Se. Our findings bring a structural identity to the phenomenological structureless deformation defect widely used in different amorphous materials.