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Direct Evidence of the Dynamic Growth of Nanotwinned Copper Grain upon Electron Beam Irradiation
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-08-25 , DOI: 10.1021/acs.cgd.0c00651 Zhaoshi Dong 1 , Chunwang Zhao 1 , Jiajie Shen 1, 2 , Yizhong Huang 3
Crystal Growth & Design ( IF 3.2 ) Pub Date : 2020-08-25 , DOI: 10.1021/acs.cgd.0c00651 Zhaoshi Dong 1 , Chunwang Zhao 1 , Jiajie Shen 1, 2 , Yizhong Huang 3
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Dynamic growth behaviors of nanotwinned Cu (nt-Cu) grain upon electron beam irradiation were investigated by in situ transmission electron microscopy. Direct evidence shows that nt-Cu grain grows in a successive mode of new crystalline lattice lamella shared coherently with the surface of the existing twin but oriented differently from each other. As such, a growth mechanism of epitaxial twinning is proposed. Interestingly, the reorientation of the face-centered cubic structure (FCC), the reversible phase transformation from FCC to hexagonal close-packed (HCP) structure, and FCC → HCP → body-centered tetragonal successive phase transformation were observed directly during the growth process of the nt-Cu grain.
中文翻译：
电子束辐照下纳米孪晶铜晶粒动态生长的直接证据
通过原位透射电子显微镜研究了纳米孪晶Cu（nt-Cu）晶粒在电子束辐照下的动态生长行为。直接证据表明，nt-Cu晶粒以连续晶格的方式生长，该晶格与现有孪晶的表面连贯地共享，但取向彼此不同。因此，提出了外延孪晶的生长机理。有趣的是，在生长过程中直接观察到了面心立方结构（FCC）的重新定向，从FCC向六方密堆积（HCP）结构的可逆相变以及FCC→HCP→体心四方连续相变。的铜铜晶粒。
更新日期：2020-10-07
中文翻译：
电子束辐照下纳米孪晶铜晶粒动态生长的直接证据
通过原位透射电子显微镜研究了纳米孪晶Cu（nt-Cu）晶粒在电子束辐照下的动态生长行为。直接证据表明，nt-Cu晶粒以连续晶格的方式生长，该晶格与现有孪晶的表面连贯地共享，但取向彼此不同。因此，提出了外延孪晶的生长机理。有趣的是，在生长过程中直接观察到了面心立方结构（FCC）的重新定向，从FCC向六方密堆积（HCP）结构的可逆相变以及FCC→HCP→体心四方连续相变。的铜铜晶粒。
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