中国物理B ›› 2018, Vol. 27 ›› Issue (6): 60205-060205.doi: 10.1088/1674-1056/27/6/060205
Growth mode of helium crystal near dislocations in titanium
Bao-Ling Zhang(张宝玲), Bao-Wen Wang(王保文), Xue Su(苏雪), Xiao-Yong Song(宋小勇), Min Li(李敏)
- 1 North China University of Water Resources and Electric Power, Zhengzhou 450011, China;
2 Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
Growth mode of helium crystal near dislocations in titanium
Bao-Ling Zhang(张宝玲)1,2, Bao-Wen Wang(王保文)1, Xue Su(苏雪)1, Xiao-Yong Song(宋小勇)1, Min Li(李敏)2
- 1 North China University of Water Resources and Electric Power, Zhengzhou 450011, China;
2 Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
摘要： The helium bubble structure and growth modes near dislocations in titanium are studied using the molecular dynamics method. A helium crystal with an HCP structure in titanium is found to have a lattice constant of 1.977 Å at 0 K. On either side of the slip plane, helium bubbles form in the (001) plane, but they are in different growth modes. On the side of the slip plane with full atomic layers, helium bubbles grow toward the slip plane and easily cross the slip plane. In the growth process, the position of the top surface of the helium bubble remains almost unchanged. On the other side of the slip plane, the helium bubble grows initially toward the dislocation core, but it is difficult to cross the slip plane, which results in growth in the opposite direction upon reaching the slip plane.
中图分类号: (Molecular dynamics and particle methods)
- 02.70.Ns