Radiation resistance of nano-crystalline iron: Coupling of the fundamental segregation process and the annihilation of interstitials and vacancies near the grain boundaries

doi:10.1016/j.actamat.2016.02.028

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院固体物理研究所

	Radiation resistance of nano-crystalline iron: Coupling of the fundamental segregation process and the annihilation of interstitials and vacancies near the grain boundaries
	Li, Xiangyan 1; Liu, Wei 1; Xu, Yichun 1; Liu, C. S.1; Pan, B. C.2,3; Liang, Yunfeng 1,4; Fang, Q. F.1; Chen, Jun-Ling 5; Luo, G. -N.5; Lu, Guang-Hong 6
刊名	ACTA MATERIALIA
	2016-05-01
卷号	109 期号:无页码:115-127
关键词	Nano-crystalline Self-healing Grain Boundary Radiation Point Defects
DOI	10.1016/j.actamat.2016.02.028
文献子类	Article
英文摘要	Finding novel nuclear materials with high radiation resistance is very important for the nuclear industry and requires the understanding of the self-healing of radiation damage in such novel materials as nano crystalline iron. Combining molecular dynamics simulations, molecular statics calculations and the object kinetic Monte Carlo method, we found that the self-healing capability of nano-crystalline iron is closely related to the coupling of the individual fundamental segregation and annihilation processes of vacancies and interstitials near the grain boundary (GB). Statically, both near the GB and at the GB, a low-energy-barrier/barrier-free region forms around the interstitial which promotes the annihilation of vacancies. The annihilation process was found to always involve the collective motion of multiple atoms due to the recovery of the strained atoms around the interstitial. Dynamically, the annihilation involves two coupled processes. Before segregating into the GB, the interstitial annihilates lots of vacancies near the GB as it diffuses near the GB together with the low-barrier region. In addition, although the interstitial is tightly bound to the GB after segregation, it efficiently removes the vacancies near the GB while moving along the GB, with the low-barrier region extending into the neighborhood of the GB and even into the grain interior. These two mechanisms were found to work at low temperatures, even temperatures where the vacancy was immobile. This study revealed the interaction of the major radiation defects at different scales and thereby uncovered the origin of the high radiation resistance of nano crystalline iron. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
WOS关键词	MECHANICAL-PROPERTIES ; MOLECULAR-DYNAMICS ; VOID FORMATION ; DAMAGE ; IRRADIATION ; DEFECTS ; FE ; SIMULATION ; TOLERANCE ; CLUSTERS
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
WOS记录号	WOS:000374617600012
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) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; 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 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 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) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; Chinese Academy of Sciences(XDA03010303) ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; National Natural Science Foundation of China(11505215 ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; Scientific Research Grant of Hefei Science Center of CAS Research Program(2015SRG-HSC012) ; 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 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11375231 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 11475214 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 51571187 ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191) ; 11275191)
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/22395]
专题	合肥物质科学研究院_中科院固体物理研究所
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, POB 1129, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China 3.Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China 4.Kyoto Univ, Environm & Resource Syst Engn, Kyoto 6158540, Japan 5.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 6.Beihang Univ, Dept Phys, Beijing 100191, Peoples R China 7.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiangyan,Liu, Wei,Xu, Yichun,et al. Radiation resistance of nano-crystalline iron: Coupling of the fundamental segregation process and the annihilation of interstitials and vacancies near the grain boundaries[J]. ACTA MATERIALIA,2016,109(无):115-127.
APA	Li, Xiangyan.,Liu, Wei.,Xu, Yichun.,Liu, C. S..,Pan, B. C..,...&Wang, Zhiguang.(2016).Radiation resistance of nano-crystalline iron: Coupling of the fundamental segregation process and the annihilation of interstitials and vacancies near the grain boundaries.ACTA MATERIALIA,109(无),115-127.
MLA	Li, Xiangyan,et al."Radiation resistance of nano-crystalline iron: Coupling of the fundamental segregation process and the annihilation of interstitials and vacancies near the grain boundaries".ACTA MATERIALIA 109.无(2016):115-127.