The mechanism on retention of hydrogen in three representative tungsten nitride compounds in nuclear fusion reactors
The mechanism on retention of hydrogen in three representative tungsten nitride compounds in nuclear fusion reactors
复制标题
核聚变反应堆中三种代表性氮化钨化合物的氢保留机制
DOI:
10.1016/j.jnucmat.2020.152687
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发表时间:
2020-11
影响因子:
3.1
通讯作者:
Pan B. C.
中科院分区:
文献类型:
--
作者:
Ye X. B.;Pan B. C.
Nitrogen gas seeding is considered as an effective strategy to reduce the edge plasma temperature. The tungsten nitride compounds, which could form on the top of tungsten (W) first wall due to nitrogen gas seeding, may act as a barrier to hinder the diffusion of hydrogen (H) from the tungsten nitride layer to W first wall. By performing first-principles calculations, we investigate the dissolution, diffusion and retention behaviors of H in W2N1, W1N1and W2N3, respectively. It is found that a H atom prefers to dissolve in tungsten nitride compounds than in W crystal. Hence the compounds can act as a barrier against H diffusion to W first wall, and probably reducing the hydrogen retention in W first wall. All of these behaviors are essentially correlated with the formation of strong N-H bonding in the compounds once H atoms dissolve in them. Moreover, our calculations indcate that H atoms do not form hydrogen molecules even within a vacancy, but stay separately from each other due to the formation of strong N-H bonding. Our work not only proposes that tungsten nitride compounds can significantly reduce hydrogen retention in W first wall, but provides a fundamental insight in understanding the interactions of H with tungsten nitride compounds.
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影响因子:
3.3
作者:
Yong Dingyu;He Haiyan;Tang Zikang;Pan Bicai
通讯作者:
Pan Bicai
DOI:
10.15017/27087
发表时间:
2010-09
期刊:
Reports of Research Institute for Applied Mechanics,Kyushu University
影响因子:
--
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
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
DOI:
10.1632/s0030812900174759
发表时间:
1995-05
期刊:
PMLA/Publications of the Modern Language Association of America
影响因子:
--
作者:
D. Batani;S. Baton;A. Casner;S. Depierreux;M. Hohenberger;O. Klimo;M. Koenig;C. Labaune;X. Ribeyre;C. Rousseaux;G. Schurtz;W. Theobald;V. Tikhonchuk
通讯作者:
D. Batani;S. Baton;A. Casner;S. Depierreux;M. Hohenberger;O. Klimo;M. Koenig;C. Labaune;X. Ribeyre;C. Rousseaux;G. Schurtz;W. Theobald;V. Tikhonchuk
影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
DOI:
10.1007/s005850050784
发表时间:
1999-05
期刊:
PMLA/Publications of the Modern Language Association of America
影响因子:
--
作者:
Guang-Hong Lu-;Hong-Bo Zhou;Charlotte S. Becquart
通讯作者:
Guang-Hong Lu-;Hong-Bo Zhou;Charlotte S. Becquart