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Operando Formation ...
Operando Formation of Van der Waals Heterostructures for Achieving Macroscale Superlubricity on Engineering Rough and Worn Surfaces
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- Li, Ruiyun (author)
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Science Lanzhou 70000 China; Institute of Materials Science and Engineering Lanzhou University Lanzhou 730000 China
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- Yang, Xing (author)
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Science Lanzhou 70000 China
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- Zhao, Jun (author)
- Luleå tekniska universitet,Maskinelement
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- Yue, Chengtao (author)
- School of Nuclear Science and Technology University of South China Hengyang 421001 China
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- Wang, Yongfu (author)
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Science Lanzhou 70000 China
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- Li, Jiangong (author)
- Institute of Materials Science and Engineering Lanzhou University Lanzhou 730000 China
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- Meyer, Ernst (author)
- Department of Physics University of Basel Klingelbergstrasse 82 Basel 4056 Switzerland
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- Zhang, Junyan (author)
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Science Lanzhou 70000 China;Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China
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- Shi, Yijun (author)
- Luleå tekniska universitet,Maskinelement
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(creator_code:org_t)
- 2022-01-22
- 2022
- English.
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In: Advanced Functional Materials. - : John Wiley & Sons. - 1616-301X .- 1616-3028. ; 32:18
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Macroscale superlubricity breakdown of lubricating materials caused by substrate surface roughening and mechanochemical modification poses great challenges for their practical tribological applications. Here, a facile way is reported to access robust macroscale superlubricity in a vacuum environment, via the operando formation of graphene/transition-metal dichalcogenide (TMDC) heterostructures at wear-induced rough surfaces. By trapping active amorphous carbon (a-C) wear products between TMDC flakes, the sandwich structures readily transform into graphene/TMDC heterostructures during running-in stage, based on shear-induced confinement and load-driven graphitization effects. Then they assemble into multipoint flake-like tribofilms to achieve macroscale superlubricity at steady stage by reducing contact area, eliminating strong cross-interface carbon–carbon interactions and polishing a-C rough nascent surface. Atomistic simulations reveal the preferential formation of graphene/TMDC heterostructures during running-in stage and demonstrate the superlubric sliding of TMDCs on the graphene. The findings are of importance to achieve robust superlubricity and provide a good strategy for the synthesis of other van der Waals heterostructures.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Tribologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Tribology (hsv//eng)
Keyword
- Machine Elements
- Maskinelement
Publication and Content Type
- ref (subject category)
- art (subject category)
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