A review of advances in tribology in 2020–2021

Meng, Yonggang; Xu, Jun; Ma, Liran; Zhang, Jin; Prakash, Braham; Ma, Tianbao; Wang, Wenzhong

doi:10.1007/s40544-022-0685-7

Cited by 53 publications

(13 citation statements)

References 995 publications

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“…Among various 2D materials, transition metal dichalcogenides (TMDCs) have attracted considerable attention for their excellent tribological performance under extreme conditions such as space environment [2]. Although the frictional properties of MoS 2 have been extensively studied [3,4], the frictional properties of other members of the TMDC family remain relatively unexplored.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

et al. 2023

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Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have layered structures with excellent tribological properties. Since the energy difference between hexagonal-molybdenum ditelluride (2H-MoTe2) and distorted octahedral-molybdenum ditelluride (1T’-MoTe2) is very small among the transition metal dichalcogenides (TMDCs), MoTe2 becomes one of the most promising candidates for phase engineering. In our experiment, we found that the friction force and friction coefficient (COF) of 2H-MoTe2 were an order of magnitude smaller than those of 1T’-MoTe2 by the atomic force microscope (AFM) experiments. The friction difference between 1T’-MoTe2 and 2H-MoTe2 was further verified in molecular dynamics (MD) simulations. The density functional theory (DFT) calculations suggest that the friction contrast is related to the difference in sliding energy barrier of the potential energy surface (PES) for a tip sliding across the surface. The PES obtained from the DFT calculation indicates that the maximum energy barrier and the minimum energy path (MEP) energy barrier of 2H-MoTe2 are both smaller than those of 1T’-MoTe2, which means that less energy needs to be dissipated during the sliding process. The difference in energy barrier of the PES could be ascribed to its larger interlayer spacing and weaker Mo–Te interatomic interactions within the layers of 2H-MoTe2 than those of 1T’-MoTe2. The obvious friction difference between 1T’-MoTe2 and 2H-MoTe2 not only provides a new non-destructive means to detect the phase transition by the AFM, but also provides a possibility to tune friction by controlling the phase transition, which has the potential to be applied in extreme environments such as space lubrication.

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Section: Introductionmentioning

confidence: 99%

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

et al. 2023

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“…FDM-generated pressure has been compared with the CFD model for verifying the results. CFD uses the Navier-Strokes equations to solve the model using Finite Volume Method (FVM) [24]. To deal with cavitation during the flow simulation multiphase mixture model has been used.…”

Section: Modelling Approachmentioning

confidence: 99%

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

Patel¹,

Khan²,

Bakolas³

et al. 2023

Preprint

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Solid asperity interactions are common and inevitable under severe loading conditions for any lubricated contact. Heavy-duty machine components (gear, bearings etc.) generally operate under Mixed Lubrication, where uneven surface features contact each other when generated fluid pressure is not enough to support the external load. The Reynolds equation is commonly used to simulate smooth lubricated contacts numerically. In rough lubricated interfaces where opposite surface asperities make contact, the Reynolds equation alone cannot accurately predict pressure using the traditional numerical simulation method. In this paper, Lubrication-Contact interface conditions (LCICs) have been implemented and extended to solve the multiple asperity contact problem using the full-multigrid approach. The developed novel algorithm has significantly accelerated the solution process and improved the accuracy and efficiency of pressure calculation for fluid-solid sub-interactions that can occur under ML regions. The Finite Difference Method (FDM) results have been compared with Computational Fluid Dynamics (CFD) simulation to validate the newly developed model. Hence, the proposed optimized solution method will provide valuable insight to researchers and industry engineers interested in simulating the ML problem where the effect of the fluid-solid interface can be captured effectively to improve reliability in the calculation of the life expectancy of the lubricated parts.

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“…Molecular adsorption on surfaces is critical not only in the basic scientific fields, but also in various applications, such as friction, lubrication, and self-assembled coatings. 1 The adsorption energies ( E ad ) of molecules on surfaces are actively studied owing to their significance in these research fields. The E ad values of various molecules on graphite surfaces have been studied using temperature-programmed desorption (TPD) measurements.…”

Section: Introductionmentioning

confidence: 99%

Analysis of intermolecular interactions ofn-perfluoroalkanes with circumcoronene using dispersion-corrected DFT calculations: comparison with those ofn-alkanes

Kikkawa

Tsuzuki

2023

Phys. Chem. Chem. Phys.

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A review of advances in tribology in 2020–2021

Cited by 53 publications

References 995 publications

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

Comparative analysis of frictional behavior and mechanism of molybdenum ditelluride with different structures

Numerical Simulation of the Lubricant-Solid Interface Using the Multigrid Method

Analysis of intermolecular interactions ofn-perfluoroalkanes with circumcoronene using dispersion-corrected DFT calculations: comparison with those ofn-alkanes

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