Quantitative investigation on sink strength of nano-grain boundary for irradiation resistance

doi:10.1016/j.jnucmat.2019.151741

	Quantitative investigation on sink strength of nano-grain boundary for irradiation resistance
	Mao, Pengyan 1,2; Cui, Jingping 1; Chen, Yangchun 3; Qiu, Jianhang 1,2; Jin, Qun 1,4; Qiao, Jixiang 1,2; Zhao, Yang 1,2; Cui, Kan 1,2; Gao, Ning 5,6; Tai, Kaiping 1,2
刊名	JOURNAL OF NUCLEAR MATERIALS
	2019-12-01
卷号	526 页码:12
关键词	Nano-grain boundary Irradiation tolerance Grain boundary characters Grain size Sink strength
ISSN号	0022-3115
DOI	10.1016/j.jnucmat.2019.151741
通讯作者	Gao, Ning(ning.gao@impcas.ac.cn) ; Tai, Kaiping(kptai@imr.ac.cn)
英文摘要	It has long been recognized that grain boundary (GB) is an effective sink to trap irradiation-induced defects. Introducing large densities of GBs becomes an effective strategy to enhance irradiation resistance. However, the nano-grained materials have poor stability under the extreme irradiation, and the effect of nano-GB characters on the irradiation sink strength is largely unknown. Here, the sink strength of nano-GB is quantitatively investigated in the nano-grained Cu and dilute Cu-W alloys with the average grain size ranging from similar to 20 to similar to 50 nm by similar to 300 keV He ions irradiation at room temperature and 673 K. The irradiation induced void volume ratio, size and distribution are confirmed to strongly depend on the grain size and irradiation temperature. The nano-GBs with different characters, such as the misorientation and GB plane, have similar relative energy. The nano-GB sink strength is independent on the GB characters, deriving from the highly curved nano-GB plane having excess volume and energy. Combining with molecular dynamics simulations, we can conclude that nano-grain size is the most vital factor for the sink strength with respect to the GB characters. With the increase of temperature and the decrease of grain size, the stable nano-GBs exhibit a behavior of "ideal" defects sink due to their high volume ratio and the increased point defect recombination probability. Our work provides a fundamental understanding of the nano-GB sink efficiency and offer a guidance for designing nano-grained structural materials with optimum anti-irradiation performance for future fusion reactors. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	Ministry of Science and Technology of China[2017YFA0700702] ; National Natural Science Foundation of China[51571193] ; National Natural Science Foundation of China[51402310] ; National Natural Science Foundation of China[11675230] ; National Natural Science Foundation of China[1137524] ; Hundred Talents Program of the Chinese Academy of Sciences ; Equipment Development Project of the Chinese Academy of Sciences
WOS关键词	MECHANICAL-PROPERTIES ; THIN-FILMS ; NANOSTRUCTURED MATERIALS ; TEMPERATURE-DEPENDENCE ; MATERIALS CHALLENGES ; STRUCTURAL-MATERIALS ; RADIATION-DAMAGE ; INDUCED CREEP ; CU ALLOYS ; ENERGY
WOS研究方向	Materials Science ; Nuclear Science & Technology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000500777900035
资助机构	Ministry of Science and Technology of China ; National Natural Science Foundation of China ; Hundred Talents Program of the Chinese Academy of Sciences ; Equipment Development Project of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/141224]
专题	中国科学院近代物理研究所
通讯作者	Gao, Ning; Tai, Kaiping
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Hunan Univ, Sch Phys & Elect, Dept Appl Phys, Changsha 410082, Hunan, Peoples R China 4.Univ Chinese Acad Sci, Shenyang 110016, Liaoning, Peoples R China 5.Chinese Acad Sci, Inst Modern Phys, Lanzhou 73000, Gansu, Peoples R China 6.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Mao, Pengyan,Cui, Jingping,Chen, Yangchun,et al. Quantitative investigation on sink strength of nano-grain boundary for irradiation resistance[J]. JOURNAL OF NUCLEAR MATERIALS,2019,526:12.
APA	Mao, Pengyan.,Cui, Jingping.,Chen, Yangchun.,Qiu, Jianhang.,Jin, Qun.,...&Tai, Kaiping.(2019).Quantitative investigation on sink strength of nano-grain boundary for irradiation resistance.JOURNAL OF NUCLEAR MATERIALS,526,12.
MLA	Mao, Pengyan,et al."Quantitative investigation on sink strength of nano-grain boundary for irradiation resistance".JOURNAL OF NUCLEAR MATERIALS 526(2019):12.