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

• 作者: Daping Liu Jinlong Wang Wenqiang Dang Zhichao Guo
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（9）
• 所属期刊栏目: ATOMIC AND MOLECULAR PHYSICS
• 页码范围: 296-303
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab9619

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.