Ripplocations in layered materials: Sublinear scaling and basal climb

J. G. Mchugh, P. Mouratidis, K. Jolley
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引用次数: 9

Abstract

The ripplocation is a crystallographic defect which is unique to layered materials, combining nanocale delamination with the crystallographic slip of a basal dislocation. Here, we have studied basal dislocations and ripplocations using analytical and computational techniques. Expressions for the energetic and structural scaling factors of surface ripplocations are derived, which are in close correspondence to the physics of a classical carpet ruck. Our simulations demonstrate that the lowest-energy structure of dislocation pile-ups in layered materials is the ripplocation, while large dislocation pile-ups in bulk graphite demonstrate multilayer delamination, curvature and voids. This can provide a concise explanation for the large volumetric expansion seen in irradiated graphite.
层状物质中的波纹:亚线性结垢和基底爬升
波纹定位是层状材料特有的一种晶体缺陷,它结合了纳米层脱层和基底位错的晶体滑移。在这里,我们使用分析和计算技术研究了基础位错和涟漪位错。推导了表面波纹的能量和结构尺度因子的表达式,与经典地毯波纹的物理特性非常接近。模拟结果表明,层状材料中位错堆积的最低能量结构是波纹位错,而块状石墨中大的位错堆积表现为多层分层、弯曲和空洞。这可以为辐照石墨的大体积膨胀提供一个简明的解释。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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