Characterization and nano-mechanical properties of tribofilms using Cu nanoparticles as additives

Yu, Helong; Xu, Yi; Shi, Pei-jing; Xu, Bin; Wang, X.L.; Liu, Qingcao; Wang, H.M.

doi:10.1016/j.surfcoat.2008.07.032

Cited by 104 publications

(39 citation statements)

References 23 publications

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“…The present results show that the wear volumes are sensitive to concentrations of CNC nanoparticles under the representative loading conditions. This phenomenon can be explained by the fact that the CNCs penetrate into the ploughing tracks on the contact surface [17,38,39], protecting the rubbed surfaces from a direct contact and thus increase lubrication mechanism.…”

Section: Resultsmentioning

confidence: 99%

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Jeng

Huang

Tsai

et al. 2014

Journal of Tribology

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An experimental investigation is performed into the tribological properties of mineral oil lubricants containing carbon nanocapsules (CNCs) additives with various concentrations (wt.%). Friction characteristics and wear behaviors at contact interfaces are examined by the block-on-ring tests, high-resolution transmission electron microscopy (HRTEM), and mapping (MAP) analysis. The results suggest that the addition of CNCs to the mineral oil yields an effective reduction in the friction coefficient at the contact interface. Molecular dynamics (MD) simulations clarify the lubrication mechanism of CNCs at the sliding system, indicating the tribological properties are essentially sensitive to the structural evolutions of CNCs.

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Section: Resultsmentioning

confidence: 99%

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Jeng

Huang

Tsai

et al. 2014

Journal of Tribology

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“…For the formulation of nanolubricants, in addition to chalcogenides and metal oxides, metallic additives have also been investigated [1,2]. The advantages of using metallic nanoparticles include high load carrying capacity, corrosion resistance and effectiveness at high temperatures [3].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, such nanoparticles have the potential to provide suitable wear protection and high load carrying ability. Among the metallic nanoparticles, a number of previous research have reported the wear protection and friction behavior of nanolubricants dispersed with copper nanoparticles [2,[4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Wear Behavior of Carbon Coated Copper Nanoparticles as an Additive to Bio-based Lubricant

2017

IJAMAE

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Abstract-This study compares the antiwear (AW) characteristics of bio-based lubricant by addition of carbon-coated copper nanoparticles with the case of non-coated copper nanoparticles, determining the effect of carbon coating. For wear elemental analysis in controlled engine environment, a four-cylinder motoring engine test rig was used. The results showed that carbon-coated nanoparticles helped in wear protection of engine parts.

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“…The effect of wear reduction by copper tribofilms has been demonstrated by many experiments, including both tribometers and real applications, such as pumps [1][2][3][4][5]. Yu et al [4] explain the observed decrease in wear by the easier pass of the contact area (and, as a consequence, less abrasive wear), but also by the sedimentation and the filling of grooves with Cu nanoparticles of the oil, leading to a lower wear as determined by a balance [6]. A decrease in wear with increasing Cu-nanoparticle concentration was also found by Yang et al [7], who explain the decrease in the wear scar diameter by the self-repairing function and the filling-up of wear grooves.…”

Section: Introductionmentioning

confidence: 99%

Multi-Phase Friction and Wear Reduction by Copper Nanopartices

et al. 2016

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Finely dispersed copper nanoparticles were added as an additive to fully-formulated engine oils. The copper additive was in colloidal form, with an inner core of Cu 2+ atoms covered by surfactants to form stable reverse micelles that are completely dispersible in the base oil. The tribological process to form protective films at the metal surface is comprised of three phases. Phase I can be considered a physical process involving the build-up of polar molecules by absorption to produce a friction modifier film, whereas phases II and III have to be treated as mechanochemical processes comprising a combination of redox reactions and a third body formation. The tribological performance was investigated using atomic force microscopy, a microtribometer, a pin-on-disk tribometer in combination with continuous and high-resolution wear measurements with radionuclide technique, and high pressure stressing in a thrust roller bearing test rig. In addition, the nanostructure of the additive was characterized by atomic force microscopy. Finally, the chemical composition of the metal surface was analyzed using photoelectron spectroscopy.

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Characterization and nano-mechanical properties of tribofilms using Cu nanoparticles as additives

Cited by 104 publications

References 23 publications

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Tribological Properties of Carbon Nanocapsule Particles as Lubricant Additive

Wear Behavior of Carbon Coated Copper Nanoparticles as an Additive to Bio-based Lubricant

Multi-Phase Friction and Wear Reduction by Copper Nanopartices

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