Effect of carbon diffusion on friction and wear properties of diamond-like carbon in boundary base oil lubrication

Aboua, Kouami Auxence Melardot; Umehara, Noritsugu; Kousaka, Hiroyuki; Deng, Xiaomin; Tasdemir, Haci Abdullah; Mabuchi, Yutaka; Higuchi, Tsuyoshi; Kawaguchi, Masahiro

doi:10.1016/j.triboint.2016.10.047

Cited by 22 publications

(10 citation statements)

References 22 publications

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“…We can observe that the friction coefficient decreases gradually from the beginning of the experiment, up to an approximate stable average value from 6000 to 10000 cycles. As was observed in the case of "a-C:H coating/S55C steel" tribopair [2], the "a-C:H coating/Cr plating" tribopair shows a decrease of the friction coefficient with increasing temperature. The friction coefficient of a-C:H coating reaches its lowest value of 0.0106 at 120°C.…”

Section: Friction Resultssupporting

confidence: 58%

“…Both roller and disk were immersed in a synthetic poly-alpha-olefin (PAO) oil with 19 mm 2 /s viscosity and a 17.08 GPa −1 pressure-viscosity coefficient at 40°C. A detail description of the experimental setup can be found elsewhere [2].…”

Section: Tribological Experimentsmentioning

confidence: 99%

“…A detail description of surface analysis method can be found elsewhere [2]. Prior to each surface analysis or investigation, all samples were washed in benzene and rinsed in acetone in an ultrasonic bath to remove contaminants and oil species.…”

Section: Surface Analysismentioning

confidence: 99%

“…Mechanical characteristics such as wear resistance and low friction coefficient are the focus of many research activities due to the industrial need to understand tribological behaviors of DLC coatings in various working environments, and against different counterpart materials. Recently, carbon diffusion has been found to play a key role in the high wear of DLC coatings, when rubbed against steel counterpart material in boundary base oil lubrication [2]. Among factors that influence the carbon diffusion, the high affinity of carbon atoms to steel material is of much importance, since iron is carbon diffusion friendly.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Carbon Diffusion on Friction and Wear Behaviors of Diamond-Like Carbon Coating Against Cr-Plating in Boundary Base Oil Lubrication

et al. 2018

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Investigations on tribological behaviors of Diamond-like Carbon (DLC) coating against other materials are strongly needed for scientific and industrial purposes. Recently, carbon diffusion has been found to play a key role in the wear of hydrogenated amorphous carbon (a-C:H) DLC coating when it is rubbed against steel counterpart material in boundary lubrication. Chromium has been reported to decrease carbon diffusion due to increase of the activation energy. In this research, we investigated on the effects of carbon diffusion on friction and wear properties of a-C:H coating when rubbed against Cr plating material. Results show that compared to steel counterpart, a-C:H coating exhibits lower friction coefficient, lower wear rate, and lower carbon diffusion rate when rubbed against Cr plating counterpart.

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Section: Friction Resultssupporting

confidence: 58%

Section: Tribological Experimentsmentioning

confidence: 99%

Section: Surface Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Carbon Diffusion on Friction and Wear Behaviors of Diamond-Like Carbon Coating Against Cr-Plating in Boundary Base Oil Lubrication

et al. 2018

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“…The pin with 30% OME in the lubricant even has a deep crater reaching down to the substrate. Although distinct groove structures are present on the pin surfaces, the underlying wear mechanism is most likely carbon diffusion, which is typically found in DLC friction contacts [8]. Abrasive wear is rather unusual with DLC systems [9].…”

Section: Tribological Resultsmentioning

confidence: 98%

Tribology of Wire Arc Spray Coatings under the Influence of Regenerative Fuels

et al. 2018

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In order to further optimize the efficiency of today's internal combustion engines, specific coatings are used on functional surfaces to reduce internal engine friction and wear. In the current research project, oxymethylene ether (OME) is discussed because it is CO 2 neutral and has a strong soot-reducing effect as a fuel or fuel additive. In some operational regimes of the internal combustion engine a dilution of engine oil by fuel must be assumed. In this paper, the frictional contact between piston ring and cylinder raceway is modelled using a pin-on-disk tribometer and the friction and wear behavior between a diamond-like carbon coating (DLC) and a thermal spray coating is characterized. The wear of the spray layer could be continuously detected by radionuclide technology (RNT). With the aid of photoelectron spectroscopic measurements (XPS), the steel thermal spray coating was chemically analyzed before and after the tribometer tests and the oxidative influence of OME was investigated. In addition, confocal microscopy was used to assess the topographies of the specimens. The measurements showed that the addition of OME to the lubricant reduced the viscosity and load-bearing capacity of the lubricating film, which led to an increase in the coefficient of friction. While almost no wear on the pin could be detected at 10% OME, the first visible material removal occurs at an OME content of 20% and the layer delaminated at 30% OME. The evaluation of the RNT wear tests showed that both the tests with engine oil and with engine oil plus 20% OME achieved very low wear rates. No corrosion of the thermal spray coating could be detected by XPS. Only the proportion of engine oil additives in the friction track increased with increasing OME concentration.

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Effect of Carbon Diffusion on Friction and Wear Behaviors of Diamond-Like Carbon Coating Against Germanium in Boundary Base Oil Lubrication

et al. 2019

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Effect of carbon diffusion on friction and wear properties of diamond-like carbon in boundary base oil lubrication

Cited by 22 publications

References 22 publications

Effect of Carbon Diffusion on Friction and Wear Behaviors of Diamond-Like Carbon Coating Against Cr-Plating in Boundary Base Oil Lubrication

Effect of Carbon Diffusion on Friction and Wear Behaviors of Diamond-Like Carbon Coating Against Cr-Plating in Boundary Base Oil Lubrication

Tribology of Wire Arc Spray Coatings under the Influence of Regenerative Fuels

Effect of Carbon Diffusion on Friction and Wear Behaviors of Diamond-Like Carbon Coating Against Germanium in Boundary Base Oil Lubrication

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