Improving tribological behaviors of gallium-based liquid metal by h-BN nano-additive

Li, Xing; Qi, Penghao; Liu, Qi; Dong, Guangneng

doi:10.1016/j.wear.2021.203852

Cited by 14 publications

(11 citation statements)

References 27 publications

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“…Liquid metal (LM) lubricants [81,[117][118][119], nanoparticle oil lubricants [119][120][121][122][123], solid lubricants [32,[124][125][126][127][128][129][130][131], and water lubricants [41,76,[132][133][134] have all recently exhibited fascinating behavior in overcoming the traditional oil lubricants' limitations. The mechanisms of these lubricants can be shown in Figure 10.…”

Section: Effect Of Surface Texture On Lubricated Conditionmentioning

confidence: 99%

“…The mechanisms of these lubricants can be shown in Figure 10. The lubrication mechanism of LM has been attributed to its interaction with the atmosphere [119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134][135], which results in the production of an oxide film in aerobic and of an adhesive film in anaerobic conditions (Figure 10). Liquid metal converting to a paste might easily adhere to the contact zone during the process, thereby lowering the COF and wear resistance.…”

Section: Effect Of Surface Texture On Lubricated Conditionmentioning

confidence: 99%

“…However, these new lubricants might be enhanced further with the use of additives. When coupled with the h-BN nano-additive [119], the tribological behavior of the LM lubrication yields extremely excellent tribological behavior under an extreme applied load, as seen in Figure 9e. In addition, for oil additives, Qi et al [136] examined the synergistic lubricating impact of antioxidants and low-content ZDDP.…”

Section: Effect Of Surface Texture On Lubricated Conditionmentioning

confidence: 99%

“…However, the use of this low content ZDDP has not been tested on surface texture and might be beneficial for further enhancement of tribological properties. In addition, the h-BN nanosheet can be considered as a candidate for enhancing the friction and wear resistance, since it can readily shear at contact surfaces with the aid of its multi-layer crystal structure, which is comparable to graphene [119]. Furthermore, Fu et al [125] focused on a modified WS 2 solid lubricant hot-pressed in texture.…”

Section: Effect Of Surface Texture On Lubricated Conditionmentioning

confidence: 99%

“…(a) the coefficient of friction with applied loads at distinct sliding velocities, reprinted with permission from [116], copyright from Elsevier 2010; (b) the COF with different texture geometries at 1 and 15 MPa, reprinted with permission from [67]. Copyright from Elsevier 2021; (c) SEM wear scar and LM deposition; (d) EDS evaluation of LM lubrication under extreme conditions of 10 N, 4Hz, and 15% area density, reprinted with permission from[81], copyright from Elsevier 2019; (e) average friction with LM and LM with 8 wt% h-BN nanosheets under various applied loads, reprinted with permission from[119]. Copyright from Elsevier 2021.…”

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confidence: 99%

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Design Methodology and Application of Surface Texture: A Review

Kouediatouka

Liu

et al. 2022

Coatings

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Surface texture is regarded as a promising solution for enhancing the tribological features of industrial materials due to its outstanding benefits, such as minimization of the contact area, enhancement of the load bearing capacity, storage of the lubricant, and management of the transition between lubrication regimes. Surface texture can be processed under either liquid or gas conditions. As compared to laser ablation in air, employing liquids or other gases as ablation media provides high accuracy and uniformity by limiting the heat-affected zone (HAZ) and other undesired defects to a large extent, as well as high crater structural features. In addition, the synergistic use of different liquid, solid, and additive lubricants with surface roughness recently demonstrated excellent performance. Therefore, surface texture helps to improve the tribological characteristics of a material. This paper reviews the design methodologies and applications of surface texture, emphasizing the proper selection of the appropriate laser parameters and ambient conditions for the best texture quality and functionality. Recent texture geometric design features to improve the film thickness and the self-lubricating system are presented. The ablation environment is explored using various media. The interaction between the lubricants’ types and surface textures is explored based on the operating conditions. Furthermore, surface texture applications using superhydrophobic surfaces, anti-drag, and vibration and noise friction are discussed. We hope that this review plays an enlightening role in follow-up research on laser surface texture.

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