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How the fluorographene replaced graphene as nanoadditive for improving tribological performances of GTL-8 based lubricant oil
Springer Science and Business Media LLC - Tập 9 - Trang 488-501 - 2020
Xiaojing Ci, Wenjie Zhao, Jun Luo, Yangmin Wu, Tianhao Ge, Qunji Xue, Xiulei Gao, Zhiwen Fang
Fluorographene, a new alternative to graphene, it not only inherits the 2-dimensional (2D) layered structure and outstanding mechanical properties, but also possesses controllable C–F bonds. It is meaningful to reveal the evolution processes of the tribological behaviors from graphene to fluorographene. In this work, fluorinated reduced graphene oxide nanosheets (F–rGO) with different degree of fl...... hiện toàn bộ
Influence and optimization of swirler parameters on elbow wear of deep coal fluidization pipeline transportation system
Springer Science and Business Media LLC - - 2024
Shaodi Zhao, Jiusheng Bao, Shirong Ge, Zhongbin Wang, Yan Yin, Congguang Huang
Elbow wear is a major threat to the multiphase pipeline transportation industry, which has a negative impact on the stable operation of the transportation system. In order to find the wear reduction methods of elbows in the fluidization pipeline transportation system for 2000-meter-deep coal resources, the swirler was installed upstream of the elbows, and wear simulations and tests of three kinds ...... hiện toàn bộ
Wear monitoring method of water-lubricated polymer thrust bearing based on ultrasonic reflection coefficient amplitude spectrum
Springer Science and Business Media LLC - Tập 11 - Trang 685-703 - 2023
Changxiong Ning, Fei Hu, Wu Ouyang, Xinpin Yan, Dongling Xu
The water-lubricated thrust bearings of the marine rim-driven thruster (RDT) are usually composed of polymer composites, which are prone to serious wear under harsh working conditions. Ultrasonic is an excellent non-destructive monitoring technology, but polymer materials are characterized by viscoelasticity, heterogeneity, and large acoustic attenuation, making it challenging to extract ultrasoni...... hiện toàn bộ
Surface modification of YS-20 with polydopamine for improving the tribological properties of polyimide composites
Springer Science and Business Media LLC - Tập 10 - Trang 411-421 - 2021
Liangfei Wu, Zhaozhu Zhang, Mingming Yang, Junya Yuan, Peilong Li, Zujun Chen, Xuehu Men
Recently, great effort has been devoted to prepare various reinforce fillers to improve polymer performances, but ignoring the importance of raw polymer powders which are indispensable parts of hot-pressed polymer composites. Herein, we engineer raw polyimide (PI) powders with the assistance of polydopamine (PDA) in aqueous solutions. After the modification, polymer powders change from hydrophobic...... hiện toàn bộ
Nanotribological studies using nanoparticle manipulation: Principles and application to structural lubricity
Springer Science and Business Media LLC - Tập 2 - Trang 114-139 - 2014
Dirk Dietzel, Udo D. Schwarz, André Schirmeisen
The term “structural lubricity” denotes a fundamental concept where the friction between two atomically flat surfaces is reduced due to lattice mismatch at the interface. Under favorable circumstances, its effect may cause a contact to experience ultra-low friction, which is why it is also referred to as “superlubricity”. While the basic principle is intriguingly simple, the experimental analysis ...... hiện toàn bộ
Comparative study on corrosion resistance and lubrication function of lithium complex grease and polyurea grease
Springer Science and Business Media LLC - Tập 9 - Trang 75-91 - 2019
Guanlin Ren, Pengfei Zhang, Xiangyuan Ye, Wen Li, Xiaoqiang Fan, Minhao Zhu
In this study, lithium complex grease (LCG) and polyurea grease (PUG) were synthesized using mineral oil (500SN) and polyalphaolefin (PAO40) as base oil, adsorbed onto lithium complex soap and polyurea as thickeners, respectively. The effects of grease formulation (thickener and base oil with different amounts (80, 85, and 90 wt%) on the corrosion resistance and lubrication function were investiga...... hiện toàn bộ
Anti-wear properties evaluation of frictional sliding interfaces in automobile engines lubricated by copper/graphene nanolubricants
Springer Science and Business Media LLC - Tập 8 - Trang 905-916 - 2019
Mohamed Kamal Ahmed Ali, Xianjun Hou, Mohamed A. A. Abdelkareem
Owing to the significance of improving fuel economy, reducing emissions, and extending the durability of engine components, this study focused on the tribological performance of nano-additives. In this study, copper (Cu) and graphene (Gr) nanomaterials were dispersed in a fully formulated engine oil (5W-30) with different concentrations. The tribological trials were investigated under various spee...... hiện toàn bộ
Two-dimensional molybdenum carbide (MXene) as an efficient nanoadditive for achieving superlubricity under ultrahigh pressure
Springer Science and Business Media LLC - Tập 11 - Trang 369-382 - 2022
Shuang Yi, Yitong Guo, Jinjin Li, Yuxin Zhang, Aiguo Zhou, Jianbin Luo
In this study, a robust macroscale liquid superlubricity with a coefficient of friction of 0.004 was achieved by introducing molybdenum carbide (Mo2CTx) MXene nanoparticles as lubricating additives in a lithium hexafluorophosphate-based ionic liquid at Si3N4—sapphire interfaces. The maximal contact pressure in the superlubricity state could reach 1.42 GPa, which far exceeds the limit of the superl...... hiện toàn bộ
New achievements in superlubricity from international workshop on superlubricity: fundamental and applications
Springer Science and Business Media LLC - Tập 3 - Trang 344-351 - 2015
Jun Xu, Jinjin Li
Since the term “superlubricity” was put forward at the beginning of 1990s, it has become one of the hottest researches in tribology due to it being close linked to the energy problems. Recently, the International Workshop on “Superlubricity: Fundamental and Applications” was successfully held on 19–20 October 2015 in Beijing, which has attracted many researchers in this field. The recent scientifi...... hiện toàn bộ
Investigation of the tribological performance of ionic liquids in non-conformal EHL contacts under electric field activation
Springer Science and Business Media LLC - Tập 8 - Trang 982-994 - 2020
Michal Michalec, Petr Svoboda, Ivan Krupka, Martin Hartl, Aleksandar Vencl
Real-time external alteration of the internal properties of lubricants is highly desirable in all mechanical systems. However, fabricating a suitable and effective smart lubricant is a long-lasting experimental process. In this study, the film thickness and frictional response of ionic liquid-lubricated non-conformal contacts to an electric field excitation under elastohydrodynamic conditions were...... hiện toàn bộ
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