Abstract

The rapid development of new technologies is often associated with the realization of nonequilibrium states in materials, in which new mechanisms of structure evolution, different from the traditional ones, can arise. One example is the formation of crowdions, that is, interstitial atoms located in close-packed atomic rows. Crowdions can move at subsonic or supersonic speeds. It has previously been demonstrated that supersonic crowdion clusters are much more efficient at transferring mass than classic supersonic crowdions. This work presents an analysis of the propagation of supersonic crowdion clusters in parallel close-packed atomic rows in an fcc Morse crystal. Supersonic 2-crowdions are excited in four close-packed atomic rows, between which there is one close-packed row, which is not initially excited. The counterintuitive formation of a vacancy in the inner atomic row was observed rather far from the point of excitation. The distance between the vacancy in the inner row and the initiation point depends on the initiation energy. The mechanism of vacancy formation is described. The results obtained can be useful for analyzing the rearrangement and accumulation of defects in materials under extreme conditions.

Graphic abstract

中文翻译：

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超音速2人群簇在3D摩尔斯晶格中的演化

摘要

新技术的飞速发展通常与材料中非平衡态的实现有关，在这种非平衡态中，可能会出现不同于传统的新的结构演化机理。一个例子是拥挤的形成，即位于紧密堆积的原子行中的填隙原子。人群可以以亚音速或超音速移动。先前已经证明，超音速拥挤簇比传统的超音速拥挤簇在转移质量方面效率更高。这项工作提出了对超音速拥挤簇在fcc摩尔斯晶体中平行紧密堆积的原子行中传播的分析。超音速2族在四个紧密堆积的原子行中被激发，在它们之间有一个紧密堆积的原子行，该行最初并未被激发。在远离激发点的位置观察到内部原子行中的空位形成了违反直觉的现象。内排空位与起始点之间的距离取决于起始能量。描述了空位形成的机理。获得的结果可用于分析极端条件下材料中缺陷的重新排列和累积。

图形摘要