DataVXSmallPaper
journal article·2021-12

Probing Atomic‐Scale Fracture of Grain Boundaries in Low‐symmetry 2D Materials

Hui Zhang, Yue Yu, Xinyue Dai, Jinshan Yu, Hua Xu, Shanshan Wang, Feng Ding, Jin Zhang

Small· Volume 17· Issue 51
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Source abstract

Abstract

Abstract Grain boundaries (GBs) play a central role in the fracture of polycrystals. However, the complexity of GBs and the difficulty in monitoring the atomic structure evolution during fracture greatly limit the understanding of the GB mechanics. Here, in situ aberration‐corrected scanning transmission electron microscopy and density functional theory calculations are combined to investigate the fracture mechanics in low‐symmetry, polycrystalline, 2D rhenium disulfide (ReS2), unveiling the distinctive crack behaviors at different GBs with atomic resolution. Brittle intergranular fracture prefers to rip through the GBs that are parallel to the Re chains of at least one side of the GBs. In contrast, those GBs, which do not align with Re chains on either side of the GBs, are highly resistant to fracture, impeding or deflecting the crack propagation. These results disclose the GB type‐dependent mechanical failure of anisotropic 2D polycrystals, providing new ideas for material reinforcement and controllable cutting via GB engineering.
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Research context

NanomaterialsComposites

OpenAlex topics: Graphene research and applications · 2D Materials and Applications · MXene and MAX Phase Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Science and Technology on Advanced Ceramic Fibers and Composites Laboratory College of Aerospace Science and Engineering National University of Defense Technology Changsha 410000 P. R. China

Center for Nanochemistry Beijing Science and Engineering Center for Nanocarbons Beijing National Laboratory for Molecular Sciences College of Chemistry and Molecular Engineering Peking University Beijing 100871 P. R. China

Centre for Multidimensional Carbon Materials Institute for Basic Science Ulsan 44919 South Korea

School of Life Sciences Shanghai University Shanghai 200444 P. R. China

Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China

School of Materials Science and Engineering Ulsan National Institute of Science and Technology Ulsan 44919 South Korea

Funding

National Natural Science Foundation of China · China Postdoctoral Science Foundation · National University of Defense Technology · Institute for Basic Science

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