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1A review of recent advances in tribology显示文摘The reach of tribology has expanded in diverse fields and tribology related research activities have seen immense growth during the last decade.This review takes stock of the recent advances in research pertaining to different aspects of tribology within the last 2 to 3 years.Different aspects of tribology that have been reviewed including lubrication,wear and surface engineering,biotribology,high tem perature tribology,and computational tribology.This review attempts to highlight recent research and also presents future outlook pertaining to these aspects.It may however be noted that there are limitations of this review.One of the most important of these is that tribology being a highly multidisciplinary field,the research results are widely spread across various disciplines and there can be omissions because of this.Secondly,the topics dealt with in the field of tribology include only some of the salient topics(such as lubrication,wear,surface engineering,biotribology,high tem perature tribology,and computational tribology)but there are many more aspects of tribology that have not been covered in this review.Despite these limitations it is hoped that such a review will bring the most recent salient research in focus and will be beneficial for the growing community of tribology researchers.Yonggang MENG Jun XU Zhongmin JIN Braham PRAKASH Yuanzhong HU 2020Friction2020,8,2:31
2镍包二硫化钼对(Cu−10Sn)基复合材料显微组织及摩擦学性能的影响显示文摘采用粉末冶金方法制备(Cu−10Sn)−Ni−MoS2复合材料,研究镍包二硫化钼对复合材料显微组织、力学性能和摩擦学性能的影响。通过单独添加Ni和MoS2的对比实验,分析Ni和MoS2对复合材料性能影响的机理。结果表明,二硫化钼颗粒周围包裹的一层镍能有效减小二硫化钼和铜基体的反应速率,显著改善基体的结合情况。当镍包二硫化钼的质量分数为12%时(C12),复合材料表现出优异的力学性能和摩擦学性能。C12复合材料在载荷为8 MPa、线速度为0.25 m/s及油润滑条件下的平均摩擦因数为0.0075;载荷为4 MPa、线速度为0.25 m/s及对偶材料40Cr干摩擦条件下的平均摩擦因数为0.1769。邱天旭 潘诗琰 范沧 朱绪飞 申小平 2020Transactions of Nonferrous Metals Society of China2020,30,9:5
3Running-in behavior of a H‒DLC/Al_(2)O_(3) pair at the nanoscale显示文摘Diamond-like carbon(DLC)film has been developed as an extremely effective lubricant to reduce energy dissipation;however,most films should undergo running-in to achieve a super-low friction state.In this study,the running-in behaviors of an H–DLC/Al_(2)O_(3) pair were investigated through a controllable single-asperity contact study using an atomic force microscope.This study presents direct evidence that illustrates the role of transfer layer formation and oxide layer removal in the friction reduction during running-in.After 200 sliding cycles,a thin transfer layer was formed on the Al2O3 tip.Compared with a clean tip,this modified tip showed a significantly lower adhesion force and friction force on the original H–DLC film,which confirmed the contribution of the transfer layer formation in the friction reduction during running-in.It was also found that the friction coefficient of the H–DLC/Al_(2)O_(3) pair decreased linearly as the oxygen concentration of the H–DLC substrate surface decreased.This phenomenon can be explained by a change in the contact surface from an oxygen termination with strong hydrogen bond interactions to a hydrogen termination with weak van der Waals interactions.These results provide new insights that quantitatively reveal the running-in mechanism at the nanoscale,which may help with the design optimization of DLC films for different environmental applications.Pengfei SHI Junhui SUN Yunhai LIU Bin ZHANG Junyan ZHANG Lei CHEN Linmao QIAN 2021Friction2021,9,6:0
4Macroscale superlubricity achieved via hydroxylated hexagonal boron nitride nanosheets with ionic liquid at steel/steel interface显示文摘Macroscale superlubricity is a prospective strategy in modern tribology to dramatically reduce friction and wear of mechanical equipment;however,it is mainly studied for point-to-surface contact or special friction pairs in experiments.In this study,a robust macroscale superlubricity for point-to-point contact on a steel interface was achieved for the first time by using hydroxylated modified boron nitride nanosheets with proton-type ionic liquids(ILs)as additives in ethylene glycol aqueous(EG_(aq)).The detailed superlubricity process and mechanism were revealed by theoretical calculations and segmented experiments.The results indicate that hydration originating from hydrated ions can significantly reduce the shear stress of EG_(aq),which plays an essential role in achieving superlubricity.Moreover,the IL induces a tribochemical reaction to form a friction-protective film.Hydroxylated boron nitride nanosheets(HO-BNNs)function as a polishing and self-repairing agent to disperse the contact stress between friction pairs.Superlubricity involves the change in lubrication state from boundary lubrication to mixed lubrication.This finding can remarkably extend the application of superlubricity for point-to-point contact on steel surfaces for engineering applications.Zhiwen ZHENG Xiaolong LIU Guowei HUANG Haijie CHEN Hongxiang YU Dapeng FENG Dan QIAO 2022Friction2022,10,9:0
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