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

doi:10.1088/1674-1056/ab9619

中国物理B ›› 2020, Vol. 29 ›› Issue (9): 93101-093101.doi: 10.1088/1674-1056/ab9619

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

Jinlong Wang(王金龙), Wenqiang Dang(党文强), Daping Liu(刘大平), Zhichao Guo(郭志超)

1 Department of Physics, Xinxiang University, Xinxiang 453003, China;
2 Department of Physics, Tianshui Normal University, Tianshui 741000, China

收稿日期:2020-03-31 修回日期:2020-05-21 接受日期:2020-05-25 出版日期:2020-09-05 发布日期:2020-09-05
通讯作者: Jinlong Wang, Wenqiang Dang E-mail:396292346@qq.com;530262320@qq.com
基金资助:
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).

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

Jinlong Wang(王金龙)¹, Wenqiang Dang(党文强)², Daping Liu(刘大平)¹, Zhichao Guo(郭志超)¹

1 Department of Physics, Xinxiang University, Xinxiang 453003, China;
2 Department of Physics, Tianshui Normal University, Tianshui 741000, China

Received:2020-03-31 Revised:2020-05-21 Accepted:2020-05-25 Online:2020-09-05 Published:2020-09-05
Contact: Jinlong Wang, Wenqiang Dang E-mail:396292346@qq.com;530262320@qq.com
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: helium cluster, self-interstitial, tungsten, molecular dynamics simulation

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.

Key words: helium cluster, self-interstitial, tungsten, molecular dynamics simulation

中图分类号: (Molecular dynamics and other numerical methods)

31.15.xv

61.80.Jh (Ion radiation effects) 61.82.Bg (Metals and alloys)

王金龙, 党文强, 刘大平, 郭志超. Size effect of He clusters on the interactions with self-interstitial tungsten atoms at different temperatures[J]. 中国物理B, 2020, 29(9): 93101-093101.

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[J]. Chin. Phys. B, 2020, 29(9): 93101-093101.

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

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

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