In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum

doi:10.1038/s41467-020-14876-y

CORC > 金属研究所 > 中国科学院金属研究所

	In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum
	Wang, Lihua 2; Du, Kui 3; Yang, Chengpeng 2; Teng, Jiao 1; Fu, Libo 2; Guo, Yizhong 2; Zhang, Ze 4; Han, Xiaodong 2
刊名	NATURE COMMUNICATIONS
	2020-03-03
卷号	11 期号:1 页码:9
ISSN号	2041-1723
DOI	10.1038/s41467-020-14876-y
通讯作者	Zhang, Ze(zezhang@zju.edu.cn) ; Han, Xiaodong(xdhan@bjut.edu.cn)
英文摘要	Twin-thickness-controlled plastic deformation mechanisms are well understood for submicron-sized twin-structural polycrystalline metals. However, for twin-structural nanocrystalline metals where both the grain size and twin thickness reach the nanometre scale, how these metals accommodate plastic deformation remains unclear. Here, we report an integrated grain size and twin thickness effect on the deformation mode of twin-structural nanocrystalline platinum. Above a similar to 10nm grain size, there is a critical value of twin thickness at which the full dislocation intersecting with the twin plane switches to a deformation mode that results in a partial dislocation parallel to the twin planes. This critical twin thickness value varies from similar to 6 to 10nm and is grain size-dependent. For grain sizes between similar to 10 to 6nm, only partial dislocation parallel to twin planes is observed. When the grain size falls below 6nm, the plasticity switches to grain boundary-mediated plasticity, in contrast with previous studies, suggesting that the plasticity in twin-structural nanocrystalline metals is governed by partial dislocation activities.
资助项目	Basic Science Center Program for Multiphase Evolution in Hypergravity of the National Natural Science Foundation of China[51988101] ; Beijing Outstanding Young Scientists Projects[BJJWZYJH01201910005018] ; NSFC[11722429] ; NSFC[51771104] ; NSFC[91860202] ; Beijing Natural Science Foundation[Z180014] ; 111 project[DB18015] ; Fok Ying-Tong Education Foundation of China[151006] ; Australian Research Council[DP190102243]
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000519260700002
资助机构	Basic Science Center Program for Multiphase Evolution in Hypergravity of the National Natural Science Foundation of China ; Beijing Outstanding Young Scientists Projects ; NSFC ; Beijing Natural Science Foundation ; 111 project ; Fok Ying-Tong Education Foundation of China ; Australian Research Council
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/137689]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Ze; Han, Xiaodong
作者单位	1.Univ Sci & Technol Beijing, Dept Mat Phys & Chem, Beijing 100083, Peoples R China 2.Beijing Univ Technol, Beijing Key Lab Microstruct & Properties Adv Mat, Beijing 100022, Peoples R China 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 4.Zhejiang Univ, Dept Mat Sci, Hangzhou 310008, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, Lihua,Du, Kui,Yang, Chengpeng,et al. In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum[J]. NATURE COMMUNICATIONS,2020,11(1):9.
APA	Wang, Lihua.,Du, Kui.,Yang, Chengpeng.,Teng, Jiao.,Fu, Libo.,...&Han, Xiaodong.(2020).In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum.NATURE COMMUNICATIONS,11(1),9.
MLA	Wang, Lihua,et al."In situ atomic-scale observation of grain size and twin thickness effect limit in twin-structural nanocrystalline platinum".NATURE COMMUNICATIONS 11.1(2020):9.