In situ atomistic deformation mechanisms of twin-structured nanocrystal Pt
In situ atomistic deformation mechanisms of twin-structured nanocrystal Pt
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双结构纳米晶Pt的原位原子变形机制
DOI:
10.1016/j.scriptamat.2018.01.012
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发表时间:
2018-04
影响因子:
6
通讯作者:
Han Xiaodong
中科院分区:
文献类型:
--
作者:
Wang Lihua;Teng Jiao;Kong Deli;Yu Guanghua;Zou Jin;Zhang Ze;Han Xiaodong
The atomic-scalein situtensile tests of twin-structured Pt (d= ~25 nm) nanocrystals were conducted using a home-made device in a high-resolution transmission electron microscope. We showed that the twin-structured Pt nanocrystals exhibit as large as 21.9% homogeneous elongation before crack emergence. The atomic-scale and time-resolvedin situinvestigation indicated that, full and partial dislocations that intersect with coherent twin boundaries (TBs), as well as TB migration resulting from partial dislocations glide adjacent to the TBs, and the rapid migration of incoherent TBs all contribute the large homogeneous elongation capability of the twin-structured nanocrystals.
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