Effect of surface modification on friction characteristics of sliding bearings: A review

Shi, Guangqiang; Yu, Xiaodong; Meng, Hua; Zhao, Feihu; Wang, Junfeng; Jiao, Jianhu; Jiang, Hui

doi:10.1016/j.triboint.2022.107937

Cited by 47 publications

(20 citation statements)

References 126 publications

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“…When the contact surface temperature is high, the grain boundary is viscous and the ability to resist deformation is reduced, so the grain boundary shear becomes the main deformation mode. In addition, high temperature and low strain can allow grain boundary annihilation to invade dislocations and induce softening [26][27][28][29][30][31]. The softening effect changes the morphology of the contact material and the migration of Cu, which induces the dry sliding behavior.…”

Section: Discussionmentioning

confidence: 99%

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Shang,

Li,

Zhang

2023

Mater. Res. Express

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In this paper, the copper coupled with steel under dry sliding are comparatively sdudied at 0.56 m s−1 and 3.36 m s−1 condition from the morphology, structure and composition of tribolayer of the copper. It is found that the wear rate of Cu at 3.36 m s−1 is twice that at 0.56 m s−1, and the temperature of Cu block at 3.36 m s−1 (240 °C) is much higher than that at 0.56 m s−1 (75 °C). The results show that when the grinding speed is 0.56 m s−1, the grain distortion occurs in the top area of the subsurface layer of Cu block. When the grinding speed is 3.36 m s−1, the grain refinement zone appears below the subsurface layer of Cu block wear. The study further proves that the softening caused by friction heat occurs in the grain refinement zone, and a large number of softened metal copper tends to transfer to the opposite side. At the same time, the friction heat changes the mechanical and thermal deformation, material transfer and friction oxidation of the contact surface, which has a great influence on the dry sliding behavior of Cu.

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Section: Discussionmentioning

confidence: 99%

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Shang,

Li,

Zhang

2023

Mater. Res. Express

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Section: Microscopic Effects Of Nanoparticle Additive Particlesmentioning

confidence: 99%

“…According to current research findings, after nanoparticles are added to the matrix lubricating oil, with the exchange of materials and energy between the matrix and lubricating medium, their microscopic action mechanism (Sun and Du, 2019; Gong et al , 2020; Kim and Singh, 2007; Chen et al , 2022; Velex and Sainsot, 2002; Shi et al , 2023; Yidong, 2012; Waqas et al , 2021; Mo and Tao, 2011; Villegas et al , 2019; Rylski and Siczek, 2020) can be summarized into the following three explanations: Nanoparticles have a filling and compensating effect. During the gear lubrication process, under the action of the base lubricating oil, nanomaterials can be drawn into the “pits” on the microsurface of the gear teeth to repair and compensate the damaged surface. Protective films are formed on the surface of the friction pair, which reduces the shear forces between the friction pairs.…”

Section: Nanoparticle Additive Materialsmentioning

confidence: 99%

Experimental analysis of vibration and noise characteristics of helical gears with nano-lubricant additives

Xu,

Xiao,

Cheng

2024

ILT

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Purpose The purpose of this study is to investigate the effects of nanoadditive lubricants on the vibration and noise characteristics of helical gears compared with conventional lubricants. The experiment aims to analyze whether nanoadditive lubricants can effectively reduce gear vibration and noise under different speeds and loads. It also analyzes the sensitivity of the vibration reduction to load and speed changes. In addition, it compares the axial and radial vibration reduction effects. The goal is to explore the application of nanolubricants for vibration damping and noise reduction in gear transmissions. The results provide a basis for further research on nanolubricant effects under high-speed conditions. Design/methodology/approach Helical gears of 20CrMnTi were lubricated with conventional oil and nanoadditive oils. An open helical gearbox with spray lubrication was tested under different speeds (200–500 rpm) and loads (20–100 N·m). Gear noise was measured by a sound level meter. Axial and radial vibrations were detected using an M+P VibRunner system and fast Fourier transform analysis. Vibration spectrums under conventional and nanolubrication were compared. Gear tooth surfaces were observed after testing. The experiment aimed to analyze the noise and vibration reduction effects of nanoadditive lubricants on helical gears and the sensitivity to load and speed. Findings The key findings are that nanoadditive lubricants significantly reduce the axial and radial vibrations of helical gears under low-speed conditions compared with conventional lubricants, with a more pronounced effect on axial vibrations. The vibration reduction is more sensitive to rotational speed than load. At the same load and speed, nanolubrication reduces noise by 2%–5% versus conventional lubrication. Nanoparticles change the friction from sliding to rolling and compensate for meshing errors, leading to smoother vibrations. The nanolubricants alter the gear tooth surfaces and optimize the microtopography. The results provide a basis for exploring nanolubricant effects under high speeds. Originality/value The originality and value of this work is the experimental analysis of the effects of nanoadditive lubricants on the vibration and noise characteristics of hard tooth surface helical gears, which has rarely been studied before. The comparative results under different speeds and loads provide new insights into the vibration damping capabilities of nanolubricants in gear transmissions. The findings reveal the higher sensitivity to rotational speed versus load and the differences in axial and radial vibration reduction. The exploration of nanolubricant effects on gear tribological performance and surface interactions provides a valuable reference for further research, especially under higher speed conditions closer to real applications. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2023-0220/

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“…However, existing designs experience several failures like wear, cavitation, high friction and less lubricant supply [2], which decreases the load bearing capacity (LBC) of the slider bearings. To date, several studies [3,4] have been reported to enhance the tribological performance of the slider bearings by reducing frictional wear. One such effective way is to incorporate textures and slip/anti-wetting coatings on the bearing surface.…”

Section: Introductionmentioning

confidence: 99%

Thermohydrodynamic performance of convergent slider bearings using different placement of square micro-textures and slip boundary

Singh,

Kango

2024

Phys. Scr.

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The present numerical study investigates the thermohydrodynamic performance of inclined/convergent slider bearings using different placing of textures and slip region. Mass-conserving Elrod cavitation model with slip boundary is used to analyze the static performance variables. Due to better fluid retain-ability, Square-shaped micro-textures have been used. The slip coefficient for the slip boundary on the bearing surface is taken as 9 μm. As reported previously for convergent bearings, the optimal convergence ratio (K) value for maximum bearing performance lies between 1 and 1.4. Therefore, in the present paper, the value of K is taken as 1.2. It was observed that the location of micro-textures and slip boundary greatly influence the bearing performance. When textures and slip regions are placed near the inlet region of the bearing, with a reduction in shear stress and the availability of the lubricant near the inlet, the resistance to the lubricant flow reduces, increasing lubricant intake. Further, for partial slip bearing, an abrupt obstruction to the lubricant flow occurs at the location of the slip/no-slip interface, which increases the hydrodynamic pressure and improves the load bearing capacity of the bearing. Moreover, due to less friction observed, various slip-textured bearings showed a reduction in the average lubricant temperature compared to conventional bearing. In the end, an updated combined slip-textured bearing surface is presented for maximum bearing performance in terms of different performance variables. The findings of the current work would be helpful for researchers in selecting the optimum slip-textured surface for inclined slider bearings under the current operating conditions.

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Effect of surface modification on friction characteristics of sliding bearings: A review

Cited by 47 publications

References 126 publications

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Experimental analysis of vibration and noise characteristics of helical gears with nano-lubricant additives

Thermohydrodynamic performance of convergent slider bearings using different placement of square micro-textures and slip boundary

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Effect of surface modification on friction characteristics of sliding bearings: A review

Cited by 47 publications

References 126 publications

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s−1 speeds

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s−1 speeds

Experimental analysis of vibration and noise characteristics of helical gears with nano-lubricant additives

Thermohydrodynamic performance of convergent slider bearings using different placement of square micro-textures and slip boundary

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Product

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Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds

Triboxidation and softening induced by dry sliding of copper coupling with steel at 3.36 m s⁻¹ speeds