Open AccessInfluence of helium on volume change and stability of titanium structure: An atomistic simulation
Author(s) -
Min Chen,
Jun Wang,
Qing Hou
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.1149
Subject(s) - helium , bubble , materials science , volume (thermodynamics) , cluster (spacecraft) , instability , liquid helium , liquid bubble , molecular dynamics , titanium , thermodynamics , atomic physics , mechanics , physics , metallurgy , computer science , programming language , quantum mechanics
Molecular dynamics was employed to study the effects of the size of helium cluster and the helium content on the elastic properties and the volume change of the material under different pressures. We tried to analyse the cause that induced volume change of titanium and the instability of the system. With the increasing of helium content, the cohesive energy reduces, the external volume of the material expands, and the materials becomes unstable. When the size of He cluster is small, with the helium bubble growing, the cohesive energy rises, a volume contraction of the material occurs, and the system tends to keep stable. When the number of helium atoms in helium bubble is over 74, it is difficult for the helium bubble to grow.