Elucidation of the thermophysical mechanism of hexagonal boron nitride as nanofluids additives

Jiang, Hua; Hou, Xiaofan; Su, Da; Liu, Haijun; Ali, Mohamed Kamal Ahmed

doi:10.1016/j.apt.2021.05.049

Cited by 20 publications

(3 citation statements)

References 56 publications

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“…Under 100 N load, the antifriction repair effect is improved, the wear surface is smoother, the surface roughness is greatly reduced, and the lubrication performance is also improved, indicating that the nano BNNs/Cu composite material has a better ability to improve the tribological performance of the cylinder liner and piston ring under high load conditions. The friction film formed by the nano-composite additive has high thermal stability [49], which is conducive to enhancing its bearing capacity and scratch resistance under harsh working conditions [50], effectively protecting the surface of the friction pair and reducing component wear.…”

Section: Discussmentioning

confidence: 99%

Insight into the tribological properties of cylinder liner-piston ring under the nano BNNs/Cu composite additive lubrication

Liu,

Guo,

Rao

et al. 2024

Surf. Topogr.: Metrol. Prop.

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To improve the tribological properties of the cylinder liner-piston ring, a two-dimensional hexagonal boron nitride/copper composite lubricant additive was prepared and characterized in detail. The tribological properties and lubrication mechanism of nano hexagonal boron nitride composites with different concentrations were studied through the reciprocating friction test on the Rtec friction and wear tester. The results show that copper is successfully reduced and attached to the surface of h-BN nanosheets through the self-polymerization of dopamine, and the spherical structure promotes the interlayer slip of the nanosheets during the reciprocating friction process. The appropriate concentration of nano composite additives has excellent anti-friction and anti-wear properties. At 1 Hz and 100 N, the friction coefficient and wear quality of the nano composite additive with a concentration of 2 wt% were reduced by 29.07% and 76%, respectively. The surface Sq value and Sz value of the cylinder liner sample decreased by 68.06% and 74.47%. At the same time, under the condition of high speed and heavy load, the average wear depth of the cylinder liner sample is reduced by 61.3%. The nano composite material additive forms an excellent friction protective film on the wear surface of the cylinder liner, which can better enter the wear surface of the cylinder liner and produce a filling and repairing effect. The research results provide a method for the use of nano hexagonal boron nitride compound additives to inhibit the wear of cylinder liner-piston rings of Marine diesel engines.

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Section: Discussmentioning

confidence: 99%

Insight into the tribological properties of cylinder liner-piston ring under the nano BNNs/Cu composite additive lubrication

Liu,

Guo,

Rao

et al. 2024

Surf. Topogr.: Metrol. Prop.

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“…The rheological properties of fluids are of particular importance for their physical and chemical properties, such as heat transfer and dispersion stability. 76,77 Therefore, multiple researchers conducted the viscosity investigation of oil-miscible ionic liquids. Yu et al 48 studied the viscosity of phosphonium-based ILs (PP-ILs) dispersed into mineral oil-based and synthetic lubricants, respectively.…”

Section: Synthesis Of Oil-soluble Ilsmentioning

confidence: 99%

A review of recent advances of ionic liquids as lubricants for tribological and thermal applications

Ali

Abdelkareem

Chowdary

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part J:

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The novel characteristics of ionic liquids (ILs) led to an improved tribological and thermal performance. This article discusses current progress in developing ILs as neat lubricants or additives in lube oils, with a focus on ILs chemistry, synthesis, miscibility, and other relevant rheological, thermal, and tribological properties at macro to nanoscales. This article also introduces a review of lubrication mechanisms based on the tribofilm formed on the rubbing interfaces owing to tribochemical reactions among the ILs, base oil, and solid bodies, which shows key insights into anti-wear properties. ILs exhibited superior anti-wear properties compared to fully formulated oils. Notably, there was no symmetry between the friction results of ILs and their wear counterpart. Furthermore, the main challenges to further improve ILs performance for tribological applications are highlighted. Eventually, prospects for ILs tribology are suggested, which will guide the development and synthesis of ILs-based lubricants for tribological applications.

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“…However, different researchers have put forward varying opinions. Jiang et al [ 24 ] investigated the h-BN/PAO6 N.F. heat transfer performance under various temperatures and concentrations using a transient hot wire method.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Heat Transfer Behaviour of Ethylene Glycol by the Introduction of Silicon Carbide Nanoparticles: An Experimental and Molecular Dynamics Simulation Study

et al. 2023

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As the critical component of automotive engine coolant, ethylene glycol (E.G.) significantly matters in heat dissipation. In this study, the key aim is to investigate the heat transfer behaviour of E.G. as nano-additives base fluid. The heat transfer capability of E.G./SiC nanofluid (N.F.) was experimentally and theoretically evaluated via transient hot wire methods and equilibrium molecular dynamics (EMD) simulation, respectively. M.D. simulation exhibited a great ability to accurately forecast the thermal conductivity of N.F. compared with the experiment results. The results confirmed that the thermal stability of N.F. is relatively greater than that of E.G. base fluids. An improvement mechanism of thermal conductivity and thermal stability under an atomic scale via the analysis of mean square displacement (MSD) and radial distribution function (RDF) calculation was elaborately presented. Ultimately, the results indicated that the diffusion effect and the increasing transition rate of liquid atoms are responsible for thermal conductivity enhancement.

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Elucidation of the thermophysical mechanism of hexagonal boron nitride as nanofluids additives

Cited by 20 publications

References 56 publications

Insight into the tribological properties of cylinder liner-piston ring under the nano BNNs/Cu composite additive lubrication

Insight into the tribological properties of cylinder liner-piston ring under the nano BNNs/Cu composite additive lubrication

A review of recent advances of ionic liquids as lubricants for tribological and thermal applications

Enhancing Heat Transfer Behaviour of Ethylene Glycol by the Introduction of Silicon Carbide Nanoparticles: An Experimental and Molecular Dynamics Simulation Study

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