Abstract

The stability of a dipole of edge dislocations embedded in a cylindrical nanowire of infinite length has been theoretically investigated from a Peach–Koehler (PK) force analysis. Calculating both gliding and climbing components of the PK force, the stable and unstable equilibrium positions of the dislocations have been characterized when the two dislocations, symmetrically displayed with respect to the nanowire center, have the same Burgers vector and when the Burgers vectors are of opposite signs. The size effect of the nanowire on the stability of the dislocations and their relative position to each other are finally discussed and compared to the case where the dislocations are embedded in an infinite-size solid.

中文翻译：

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纳米线尺寸对位错偶极子平衡位置的影响

摘要

通过 Peach-Koehler (PK) 力分析，从理论上研究了嵌入无限长度圆柱形纳米线中的刃位错偶极子的稳定性。通过计算 PK 力的滑动和攀爬分量，当相对于纳米线中心对称显示的两个位错具有相同的 Burgers 矢量以及当 Burgers 矢量相反时，位错的稳定和不稳定平衡位置已被表征。迹象。最后讨论了纳米线对位错稳定性及其相对位置的尺寸效应，并与位错嵌入无限尺寸固体的情况进行了比较。