Surface Triple Junctions Govern the Strength of a Nanoscale Solid

doi:10.1103/PhysRevLett.126.235501

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	Surface Triple Junctions Govern the Strength of a Nanoscale Solid
	Zhang, Ye-Yuan 1,2; Xie, Hui 1; Liu, Ling-Zhi 1; Jin, Hai-Jun 1
刊名	PHYSICAL REVIEW LETTERS
	2021-06-11
卷号	126 期号:23 页码:6
ISSN号	0031-9007
DOI	10.1103/PhysRevLett.126.235501
通讯作者	Jin, Hai-Jun(hjjin@imr.ac.cn)
英文摘要	Surface triple junctions (STJs), i.e., the termination lines of grain boundaries at solid surface, are the common line defects in polycrystalline materials. Compared with planar defects such as grain boundaries and surfaces, STJ lines are usually overlooked in a material's strengthening although abundant atoms may reside at STJs in many nanomaterials. In this study, by in situ compression of coarse-grained and nanocrystalline nanoporous gold samples in an electrochemical environment, the effect of STJs on the strength of nanoporous gold was successfully decoupled from grain-boundary and surface effects. We found that the strength of nanoporous gold became sensitive to STJ modification when ligament size was decreased to below similar to 100 nm, indicating that STJs started to influence ligament strength at sub-100 nm scale. This STJ effect was associated with the emission of dislocations from STJs during plastic deformation. Our findings strongly suggest that the structure and chemistry at STJs should be considered in understanding the mechanical response of sub-100 nm scale materials.
资助项目	National Natural Science Foundation of China[51971218] ; National Key R&D Program of China[2017YFA0204401]
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000661902600018
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160564]
专题	金属研究所_中国科学院金属研究所
通讯作者	Jin, Hai-Jun
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Ye-Yuan,Xie, Hui,Liu, Ling-Zhi,et al. Surface Triple Junctions Govern the Strength of a Nanoscale Solid[J]. PHYSICAL REVIEW LETTERS,2021,126(23):6.
APA	Zhang, Ye-Yuan,Xie, Hui,Liu, Ling-Zhi,&Jin, Hai-Jun.(2021).Surface Triple Junctions Govern the Strength of a Nanoscale Solid.PHYSICAL REVIEW LETTERS,126(23),6.
MLA	Zhang, Ye-Yuan,et al."Surface Triple Junctions Govern the Strength of a Nanoscale Solid".PHYSICAL REVIEW LETTERS 126.23(2021):6.