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Deformation-mechanism dependent stretchability of nanocrystalline gold films on flexible substrates
Luo, Xue-Mei; Zhang, Guang-Ping; Zhang, GP (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
2017-09-28
发表期刊CAMBRIDGE UNIV PRESS
ISSN0884-2914
卷号32期号:18页码:3516-3523
摘要Stretchability of polyimide-supported nanocrystalline Au films with a thickness ranging from 930 to 20 nm was evaluated by uniaxial tensile testing. The results show that the fracture strain gradually decreased with decreasing the film thickness. Such degraded stretchability depends on plastic deformation mechanisms associated with the length scales. As the film thickness is larger than 90 nm, local thinning in the grown grains contributed to the high stretchability. Full dislocation behaviors including dislocation pileup in the 930 nm-thick film, the activation of Frank-Read dislocation source in the 170 nm-thick film and the grain boundary dislocation source in the 90 nm-thick film were dominated plastic deformation. As the film thickness is less than 40 nm, low stretchability of thin films resulted from intergranular fracture, and partial dislocation behaviors became prevailed. Evident grain growth happened in the films studied except for the 20 nm-thick film, which is expected to be involved in the stretchability of the nanocrystalline metal films on flexible substrates.; Stretchability of polyimide-supported nanocrystalline Au films with a thickness ranging from 930 to 20 nm was evaluated by uniaxial tensile testing. The results show that the fracture strain gradually decreased with decreasing the film thickness. Such degraded stretchability depends on plastic deformation mechanisms associated with the length scales. As the film thickness is larger than 90 nm, local thinning in the grown grains contributed to the high stretchability. Full dislocation behaviors including dislocation pileup in the 930 nm-thick film, the activation of Frank-Read dislocation source in the 170 nm-thick film and the grain boundary dislocation source in the 90 nm-thick film were dominated plastic deformation. As the film thickness is less than 40 nm, low stretchability of thin films resulted from intergranular fracture, and partial dislocation behaviors became prevailed. Evident grain growth happened in the films studied except for the 20 nm-thick film, which is expected to be involved in the stretchability of the nanocrystalline metal films on flexible substrates.
部门归属[luo, xue-mei ; zhang, guang-ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china
学科领域Materials Science, Multidisciplinary
资助者National Natural Science Foundation of China (NSFC) [51601198, 51571199]; NSFC [51371180]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79083
专题中国科学院金属研究所
通讯作者Zhang, GP (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式
GB/T 7714
Luo, Xue-Mei,Zhang, Guang-Ping,Zhang, GP . Deformation-mechanism dependent stretchability of nanocrystalline gold films on flexible substrates[J]. CAMBRIDGE UNIV PRESS,2017,32(18):3516-3523.
APA Luo, Xue-Mei,Zhang, Guang-Ping,&Zhang, GP .(2017).Deformation-mechanism dependent stretchability of nanocrystalline gold films on flexible substrates.CAMBRIDGE UNIV PRESS,32(18),3516-3523.
MLA Luo, Xue-Mei,et al."Deformation-mechanism dependent stretchability of nanocrystalline gold films on flexible substrates".CAMBRIDGE UNIV PRESS 32.18(2017):3516-3523.
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