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  4. 中科院等离子体物理研究所
Clustering of transmutation elements tantalum, rhenium and osmium in tungsten in a fusion environment

文献类型：期刊论文

作者You, Yu-Wei1; Kong, Xiang-Shan1; Wu, Xuebang1; Liu, C. S.1; Fang, Q. F.1; Chen, J. L.2; Luo, G. -N.2
刊名NUCLEAR FUSION
出版日期2017-08-01
卷号57期号:8页码:1-10
关键词Transmutation Elements Tantalum Rhenium Osmium Nuclear Fusion First-principles Calculations Transmutation Element Precipitate
DOI10.1088/1741-4326/aa70b2
文献子类Article
英文摘要The formation of transmutation solute-rich precipitates has been reported to seriously degrade the mechanical properties of tungsten in a fusion environment. However, the underlying mechanisms controlling the formation of the precipitates are still unknown. In this study, first-principles calculations are therefore performed to systemically determine the stable structures and binding energies of solute clusters in tungsten consisting of tantalum, rhenium and osmium atoms as well as irradiation-induced vacancies. These clusters are known to act as precursors for the formation of precipitates. We find that osmium can easily segregate to form clusters even in defect-free tungsten alloys, whereas extremely high tantalum and rhenium concentrations are required for the formation of clusters. Vacancies greatly facilitate the clustering of rhenium and osmium, while tantalum is an exception. The binding energies of vacancy-osmium clusters are found to be much higher than those of vacancy-tantalum and vacancy-rhenium clusters. Osmium is observed to strongly promote the formation of vacancy-rhenium clusters, while tantalum can suppress the formation of vacancy-rhenium and vacancy-osmium clusters. The local strain and electronic structure are analyzed to reveal the underlying mechanisms governing the cluster formation. Employing the law of mass action, we predict the evolution of the relative concentration of vacancy-rhenium clusters. This work presents a microscopic picture describing the nucleation and growth of solute clusters in tungsten alloys in a fusion reactor environment, and thereby explains recent experimental phenomena.
WOS关键词NEUTRON-IRRADIATED TUNGSTEN ; W-RE ALLOYS ; ATOM-PROBE TOMOGRAPHY ; MICROSTRUCTURAL DEVELOPMENT ; 1ST-PRINCIPLES CALCULATIONS ; POINT-DEFECTS ; TRANSITION ; METALS ; NANOINDENTATION ; PRECIPITATION
WOS研究方向Physics
语种英语
WOS记录号WOS:000403340600005
资助机构National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Magnetic Confinement Fusion Program(2015GB112001) ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; National Natural Science Foundation of China(11405202 ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Youth Innovation Promotion Association of CAS(2015384) ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; Center for Computation Science, Hefei Institutes of Physical Sciences ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; International Atomic Energy Agency ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229) ; 11505229)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/31881]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, POB 1129, Hefei 230031, Peoples R China
2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 You, Yu-Wei,Kong, Xiang-Shan,Wu, Xuebang,et al. Clustering of transmutation elements tantalum, rhenium and osmium in tungsten in a fusion environment[J]. NUCLEAR FUSION,2017,57(8):1-10.
APA You, Yu-Wei.,Kong, Xiang-Shan.,Wu, Xuebang.,Liu, C. S..,Fang, Q. F..,...&Luo, G. -N..(2017).Clustering of transmutation elements tantalum, rhenium and osmium in tungsten in a fusion environment.NUCLEAR FUSION,57(8),1-10.
MLA You, Yu-Wei,et al."Clustering of transmutation elements tantalum, rhenium and osmium in tungsten in a fusion environment".NUCLEAR FUSION 57.8(2017):1-10.

入库方式： OAI收割

来源：合肥物质科学研究院

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