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影响因子：42.6

DOI码：10.1038/s41563-021-01091-3

发表刊物：Nature Materials

摘要：The field of nanotribology has long suffered from the inability to directly observe what takes place at a sliding interface. Although techniques based on atomic force microscopy have identified many friction phenomena at the nanoscale, many interpretative pitfalls still result from the indirect or ex situ characterization of contacting surfaces. Here we combined in situ high-resolution transmission electron microscopy and atomic force microscopy measurements to provide direct real-time observations of atomic-scale interfacial structure during frictional processes and discovered the formation of a loosely packed interfacial layer between two metallic asperities that enabled a low friction under tensile stress. This finding is corroborated by molecular dynamic simulations. The loosely packed interfacial layer became an ordered layer at equilibrium distances under compressive stress, which led to a transition from a low-friction to a dissipative high-friction motion. This work directly unveils a unique role of atomic diffusion in the friction of metallic contacts.

合写作者：Li Zhong

第一作者：Yang He, Dingshun She, Zhenyu Liu, Xiang Wang

论文类型：期刊论文

通讯作者：Chongmin Wang, Guofeng Wang, Scott X. Mao

学科门类：工学

文献类型：J

卷号：21

期号：2

页面范围：173-180

是否译文：否

发表时间：2021-10-07

收录刊物：SCI

发布期刊链接：https://doi.org/10.1038/s41563-021-01091-3