Trapping of multiple hydrogen atoms in a tungsten monovacancy

Trapping of multiple hydrogen atoms in a tungsten monovacancy
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DOI:
10.15017/27087
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发表时间:
2010-09
期刊:
Reports of Research Institute for Applied Mechanics,Kyushu University
影响因子:
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通讯作者:
K. Ohsawa;大澤 一人;Junya Goto;後藤 準也;Masahiro Yamakami;山上 真広;M. Yamaguchi;山口 正剛;M. Yagi
K. Ohsawa;大澤 一人;Junya Goto;後藤 準也;Masahiro Yamakami;山上 真広;M. Yamaguchi;山口 正剛;M. Yagi
中科院分区:
其他
文献类型:
--
作者:
K. Ohsawa;大澤 一人;Junya Goto;後藤 準也;Masahiro Yamakami;山上 真広;M. Yamaguchi;山口 正剛;M. Yagi

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用第一性原理计算方法研究了捕获在钨单空位中的多个氢原子的构型。不同于以前的计算研究,报道了体心立方金属单空位中的氢占据八面体间隙位,发现随着氢原子数目的增加,稳定位向四面体间隙位移动。其结果是,最多有12个氢原子可以被捕获在钨的单空位中。
The configuration of multiple hydrogen atoms trapped in a tungsten monovacancy is investigated using first-principles calculations to determine trapping energy. Unlike previous computational studies, which have reported that hydrogen in BCC metal monovacancies occupies octahedral interstitial sites, it is found that the stable sites shift towards tetrahedral interstitial sites as the number of hydrogen atoms increases. As a result, a maximum of twelve hydrogen atoms can become trapped in a tungsten monovacancy.