Size effect of He clusters on the interactions with self-interstitial tungsten atoms at different temperatures

doi:10.1088/1674-1056/ab9619

Abstract The behaviors of helium clusters and self-interstitial tungsten atoms at different temperatures are investigated with the molecular dynamics method. The self-interstitial tungsten atoms prefer to form crowdions which can tightly bind the helium cluster at low temperature. The crowdion can change its position around the helium cluster by rotating and slipping at medium temperatures, which leads to formation of combined crowdions or dislocation loop locating at one side of a helium cluster. The combined crowdions or dislocation loop even separates from the helium cluster at high temperature. It is found that a big helium cluster is more stable and its interaction with crowdions or dislocation loop is stronger.

Keywords: helium cluster self-interstitial tungsten molecular dynamics simulation

Received: 31 March 2020
Revised: 21 May 2020
Accepted manuscript online: 25 May 2020

PACS:	31.15.xv	(Molecular dynamics and other numerical methods)
	61.80.Jh	(Ion radiation effects)
	61.82.Bg	(Metals and alloys)

Fund: Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 11705157), the Henan Provincial Key Research Projects, China (Grant No. 17A140027), and the Ninth Group of Key Disciplines in Henan Province of China (Grant No. 2018119).

Corresponding Authors: Jinlong Wang, Wenqiang Dang
E-mail: 396292346@qq.com;530262320@qq.com

Cite this article:

Jinlong Wang(王金龙), Wenqiang Dang(党文强), Daping Liu(刘大平), Zhichao Guo(郭志超) Size effect of He clusters on the interactions with self-interstitial tungsten atoms at different temperatures 2020 Chin. Phys. B 29 093101

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Size effect of He clusters on the interactions with self-interstitial tungsten atoms at different temperatures

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