Molecular dynamics simulation of the effect of sub-surface helium bubbles on hydrogen retention in tungsten

被引：62
|
作者：
Juslin, N. [1 ]
Wirth, B. D. [1 ]
机构：
[1] Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA
来源：
JOURNAL OF NUCLEAR MATERIALS | 2013年 / 438卷
关键词：
DEUTERIUM; CASCADES; CLUSTERS; SURFACE; HE;
D O I：
10.1016/j.jnucmat.2013.01.270
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nanometer-sized bubbles in tungsten containing various concentrations of helium and/or hydrogen gas were studied using molecular dynamics simulations. Bubbles of different sizes and compositions were relaxed and evolved at temperatures from 300 K to 2100 K. Helium atoms are evenly distributed inside the bubble at all temperatures, while the hydrogen tends to diffuse to the bubble periphery. In all cases a large amount of hydrogen is bound within the first 1-2 layers of the tungsten matrix surrounding the bubble, though clear dependencies on temperature and bubble composition were found. (C) 2013 Elsevier B. V. All rights reserved.
引用
收藏
页码：S1221 / S1223
页数：3
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