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影响因子：7.5

DOI码：10.1080/21663831.2022.2108349

发表刊物：Materials Research Letters

摘要：Local thickening, resulting from displacive or diffusive mechanisms individually, is frequently observed in nanoscale metals during compression. However, it is not fully understood how a coupled displacive-diffusive mechanism would mediate the compressive deformation of metallic nanocrystal. Here, by conducting in situ atomic-scale compression tests, we find that, instead of local thickening commonly reported thus far, abnormal thinning events consecutively occur in silver nanocrystals, where preexisting dislocations and crystal slip serve as stimuli to activate surface atom diffusion. Below a critical width, tensile-fracture-like failure occurs in the silver nanocrystals. This work sheds light on atomic-scale diffusion-mediated compressive deformation of metallic nanocrystal.

合写作者：Xiang Wang,Susheng Tan

第一作者：Sixue Zheng

论文类型：期刊论文

通讯作者：Guofeng Wang, Scott X. Mao

学科门类：工学

文献类型：J

卷号：10

期号：12

页面范围：805-812

是否译文：否

发表时间：2022-08-06

收录刊物：SCI

发布期刊链接：https://www.tandfonline.com/doi/full/10.1080/21663831.2022.2108349