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

被引：63

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

页码：S1221 / S1223

页数：3

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