Electrical Sliding Friction Lubricated with Ionic Liquids

Kong, Lingling; Wang, Xiaolei

doi:10.1007/s11249-016-0802-8

Cited by 31 publications

(23 citation statements)

References 16 publications

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“…When the surface texture associates with the lubricant, the combination can exhibit some synergistic lubrication mechanisms including acting as micro-reservoirs of lubricants to increase the local lubricant supply and functioning as microhydrodynamic bearings to increase the load-carrying capacity, which can greatly enhance the tribological properties [8,[17][18][19]. However, the lubricant applied for sliding electrical contacts should possess outstanding lubricating ability and preferable conductivity [20][21][22]. When performing the functions of friction reduction, anti-wear, cooling, and corrosion prevention, the lubricants could also form conductive paths to transmit current between the contact interfaces, thereby reducing the ECR.…”

Section: Introductionmentioning

confidence: 99%

A synergetic strategy based on laser surface texturing and lubricating grease for improving the tribological and electrical properties of Ag coating under current-carrying friction

et al. 2020

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Herein, a series of Ag coatings with different micro-dimples were fabricated on copper surfaces by laser surface texturing (LST) and magnetron sputtering. Multilayer graphene lubricating grease (MGLG) was prepared using multilayer graphene as an additive. The textured Ag coatings and MGLG were characterized. Moreover, the tribological and electrical performances of the textured Ag coatings under MGLG lubrication were investigated in detail. Results demonstrated that the textured Ag coating with an appropriate dimple diameter could exhibit improved tribological and electrical properties when compared to the non-textured Ag coating under MGLG lubrication. The characterization and analysis of the worn surfaces suggest that the synergetic effect of LST and MGLG contributes to these excellent tribological and electrical properties.

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Section: Introductionmentioning

confidence: 99%

A synergetic strategy based on laser surface texturing and lubricating grease for improving the tribological and electrical properties of Ag coating under current-carrying friction

et al. 2020

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“…The released ILs enter into the contact area, thereby avoiding the direct contact between copper and friction counterpart, which decreases the initial COF. This result can be proven by the results in Figure a, and the resistance is high in the initial stage due to the released ILs with a lower electrical conductivity than metal . Therefore, the COF is only affected by the frictional stimulation for 180 s, followed by a sudden increase because the supply rate is slower in ILs than that in occurrence of wear.…”

Section: Resultsmentioning

confidence: 59%

Controlled Friction Behaviors of Porous Copper/Graphite Storing Ionic Liquid through Electrical Stimulation

Zhang

Xie

Wang³

et al. 2017

Adv Eng Mater

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Porous copper/graphite composites storing stimuli-responsive lubricant can be used to fabricate a new kind of electrical contact friction materials. However, the synergetic lubricating effect of solid and liquid lubricants incorporated into the copper matrix is rarely discussed. In this work, neat copper and its composites storing ionic liquids (ILs) have been successfully prepared via a template-free strategy. The effect of frictional, electrical, and electro-frictional coupling stimulation on the tribological behavior of the copper filled with graphite has been investigated using ball-on-disk friction tests. Results show that a high voltage may accelerate the release of the ILs stored in the composite to the friction interface, thereby resulting in a low coefficient of friction (COF) (ca. 0.14) at the voltage of 0.5 V, which is superior to those of the pure copper without applying voltage. The COF is more stable in copper/graphite composite storing ILs (SI) than in copper-SI. Therefore, the graphite efficiently protects the surface of the sample from wear and electrochemical corrosion.

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“…Because their molecule size is relatively smaller than the surface roughness, the size of asperities can significantly influence the ER effect of ionic liquids [18]. A study was conducted in the tribological field on a sliding friction comparison between a dry and IL-lubricated contact [19] where a strong influence of an applied electric current was observed. Despite the achieved changes in the coefficient of friction (COF), whether the difference is caused by the composition of ionic liquids or different behaviour of lubricated and dry contact is unclear.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the tribological performance of ionic liquids in non-conformal EHL contacts under electric field activation

et al. 2020

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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 examined. Film thickness was evaluated using a "ball-on-disc" optical tribometer with an electric circuit. Friction tests were carried on a mini traction machine (MTM) tribometer with a "ball-on-disc" rotation module and an electric circuit for contact area excitation. The results demonstrate that there is a difference in the behaviour of the ionic liquid during electric field excitation at the evaluated film thicknesses. The results of evaluated film thicknesses demonstrate that there is a difference in the behaviour of the ionic liquid during electric field excitation. Therefore, the ionic liquids could be a new basis for the smart lubrication of mechanical components. Moreover, the proposed experimental approach can be used to identify electrosensitive fluids. Friction 8(5): 982-994 (2020) 983 |www.Springer.com/journal/40544 | Friction http://friction.tsinghuajournals.comFriction 8(5): 982-994 (2020) | https://mc03.manuscriptcentral.com/frictionFriction 8(5): 982-994 (2020)

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Electrical Sliding Friction Lubricated with Ionic Liquids

Cited by 31 publications

References 16 publications

A synergetic strategy based on laser surface texturing and lubricating grease for improving the tribological and electrical properties of Ag coating under current-carrying friction

A synergetic strategy based on laser surface texturing and lubricating grease for improving the tribological and electrical properties of Ag coating under current-carrying friction

Controlled Friction Behaviors of Porous Copper/Graphite Storing Ionic Liquid through Electrical Stimulation

Investigation of the tribological performance of ionic liquids in non-conformal EHL contacts under electric field activation

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