Haoyu Deng, Tongtong Yu, Changhe Du, Ruilin Shen, Yongkang Zhao, Xinjian He, Yange Feng, Liqiang Zhang, Daoai Wang
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Large-size and high-quality NPS crystals with up to 14 mm × 6 mm × 0.3 mm dimensions were grown using the chemical vapor transport method. The NPS nanosheets were obtained using mechanical exfoliation. The dependence of the NPS nanotribology on layer, velocity, and angle was systematically investigated using lateral force microscopy. Interestingly, the coefficient of friction (COF) of NPS with multilayers was decreased to about 0.0045 under 0.005 Pa vacuum condition (with load up to 767.8 nN), achieving the ultra-low friction state. The analysis of the frictional dissipation energy and adhesive forces showed that NPS with multilayers had minimum frictional dissipation energy and adhesive forces since the interlayer interactions were weak and the meniscus force was excluded under vacuum conditions. 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引用次数: 0
摘要
超低摩擦对于纳米器件的抗摩擦、抗磨损和长寿命运行至关重要。然而,能实现超低摩擦的二维材料寥寥无几,在应用上也有一定的局限性。因此,探索具有超低摩擦性能的新型材料意义重大。三元二维材料的出现为纳米级超低摩擦带来了新的机遇。本研究将一种能在真空中实现超低摩擦的新型二维三元材料--三硫化磷镍(NiPS3,简称 NPS)引入了大型纳米晶体家族。利用化学气相传输方法生长出了尺寸达 14 mm × 6 mm × 0.3 mm 的大尺寸高质量 NPS 晶体。通过机械剥离法获得了 NPS 纳米片。使用侧向力显微镜系统地研究了 NPS 纳米结构对层、速度和角度的依赖性。有趣的是,在 0.005 Pa 真空条件下(载荷达 767.8 nN),多层 NPS 的摩擦系数(COF)降至约 0.0045,实现了超低摩擦状态。对摩擦耗散能和粘附力的分析表明,在真空条件下,由于层间相互作用微弱且不存在半月板力,因此多层 NPS 的摩擦耗散能和粘附力最小。这项关于三元二维材料纳米摩擦的研究为今后探索其他二维材料的纳米摩擦和摩擦起源奠定了基础。
Nickel phosphorous trisulfide: A ternary 2D material with an ultra-low coefficient of friction
Ultra-low friction is crucial for the anti-friction, anti-wear, and long-life operation of nanodevices. However, very few two-dimensional materials can achieve ultra-low friction, and they have some limitations in their applications. Therefore, exploring novel materials with ultra-low friction properties is greatly significant. The emergence of ternary two-dimensional materials has opened new opportunities for nanoscale ultra-low friction. This study introduced nickel phosphorous trisulfide (NiPS3, referred to as NPS), a novel two-dimensional ternary material capable of achieving ultralow friction in a vacuum, into the large nanotribology family. Large-size and high-quality NPS crystals with up to 14 mm × 6 mm × 0.3 mm dimensions were grown using the chemical vapor transport method. The NPS nanosheets were obtained using mechanical exfoliation. The dependence of the NPS nanotribology on layer, velocity, and angle was systematically investigated using lateral force microscopy. Interestingly, the coefficient of friction (COF) of NPS with multilayers was decreased to about 0.0045 under 0.005 Pa vacuum condition (with load up to 767.8 nN), achieving the ultra-low friction state. The analysis of the frictional dissipation energy and adhesive forces showed that NPS with multilayers had minimum frictional dissipation energy and adhesive forces since the interlayer interactions were weak and the meniscus force was excluded under vacuum conditions. This study on the nanoscale friction of a ternary two-dimensional material lays a foundation for exploring the nanoscale friction and friction origin of other two-dimensional materials in the future.
期刊介绍:
Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as:
Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc.
Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc.
Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc.
Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc.
Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc.
Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.