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Surface Triple Junctions Govern the Strength of a Nanoscale Solid
Zhang, Ye-Yuan1,2; Xie, Hui1; Liu, Ling-Zhi1; Jin, Hai-Jun1
Corresponding AuthorJin, Hai-Jun(hjjin@imr.ac.cn)
2021-06-11
Source PublicationPHYSICAL REVIEW LETTERS
ISSN0031-9007
Volume126Issue:23Pages:6
AbstractSurface 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.
Funding OrganizationNational Natural Science Foundation of China ; National Key R&D Program of China
DOI10.1103/PhysRevLett.126.235501
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51971218] ; National Key R&D Program of China[2017YFA0204401]
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000661902600018
PublisherAMER PHYSICAL SOC
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/160565
Collection中国科学院金属研究所
Corresponding AuthorJin, Hai-Jun
Affiliation1.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
Recommended Citation
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.
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