Journal
CHINESE PHYSICS B
Volume 29, Issue 9, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/ab9619
Keywords
helium cluster; self-interstitial; tungsten; molecular dynamics simulation
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Funding
- Young Scientists Fund of the National Natural Science Foundation of China [11705157]
- Henan Provincial Key Research Projects, China [17A140027]
- Ninth Group of Key Disciplines in Henan Province of China [2018119]
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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.
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