Tribological investigation of applicability of nano-sized cupricoxide (CuO) ceramic material in automotive vehicles

Tóth, Álmos Dávid; Szabó, Ádám István; Kuti, Rajmund; Rohde-Brandenburger, Jan

doi:10.5937/fme2102335t

Cited by 8 publications

(11 citation statements)

References 27 publications

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“…This plastic deformation offered positive tribological properties to the tribological system, it increased the area of the contacting surfaces resulting in a lower surface pressure of the tribological system. Compared with previous experiments with the same tribological methodology [18,26] this kind of plastic deformation could not be observed in the presence of another nanoceramic doped lubricant samples.…”

Section: Elementcontrasting

confidence: 60%

Tribological Properties of the Nanoscale Spherical Y2O3 Particles as Lubricant Additives in Automotive Application

et al. 2022

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The continuous tribological development of engine lubricants is becoming more and more vital due to its fuel efficiency improvement and lifetime increasing potential. The antiwear additives play a high role in the lubricants to protect the contacting surfaces even in the presence of thinner oil film. Nanoscale spherical particles in the lubricant may increase the necessary protecting effect. This paper presents the results of the experimental tribological investigation of nanoscale spherical Y2O3 (yttria) ceramic particles as an engine lubricant additive. The ball-on-disc tribological measurements have revealed an optimum concentration at 0.5 wt% with about 45% wear scar diameter and 90% wear volume decrease, compared to the reference, neat Group III base oil. The high-magnitude SEM analysis revealed the working mechanisms of yttria: the particles collected in the roughness valleys resulted in a smoother contacting surface, they were tribo-sintered and they have also caused slight plastic deformation of the outer layer of the metallic surface.

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Section: Elementcontrasting

confidence: 60%

Tribological Properties of the Nanoscale Spherical Y2O3 Particles as Lubricant Additives in Automotive Application

et al. 2022

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“…This information confirms the previously mentioned positive antiwear properties of this cupric oxide nanoparticle. The characteristic yellowish color of the elemental copper produced during the triboreduction of CuO during wear can be observed on the ball test specimen [21]. Figure 4 illustrates the captured digital microscope images of the worn surfaces of 0.4 wt% cupric oxide added and of the reference (each of the images were captured with the same setups of the microscope).…”

Section: Cupric Oxidementioning

confidence: 99%

“…It was found that the CuO nanoparticles achieve the friction-reducing effect (~15% reduction) with the generation of elemental copper produced during the triboreduction of CuO. The optimal CuO concentration was found to be 0.5 wt%, and the wear volume was reduced by 69% [21]. The friction-and wear-reducing effect of nanosized CuO has also been demonstrated in liquid paraffin [22] and formulated lubricating oils [23,24]: in the case of 10W-30 lubricant doped with nanosized CuO, an EDX analysis showed that an elemental copper layer forms on the surfaces [25].…”

Section: Introductionmentioning

confidence: 97%

Tribological Investigation of the Effect of Nanosized Transition Metal Oxides on a Base Oil Containing Overbased Calcium Sulfonate

2023

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In this study, copper(II) oxide, titanium dioxide and yttrium(III) oxide nanoparticles were added to Group III-type base oil formulated with overbased calcium sulfonate. The nanosized oxides were treated with ethyl oleate surface modification. The tribological properties of the homogenized oil samples were tested on a linear oscillating tribometer. Friction was continuously monitored during the tribological tests. A surface analysis was performed on the worn samples: the amount of wear was determined using a digital optical and confocal microscope. The type of wear was examined with a scanning electron microscope, while the additives adhered to the surface were examined with energy-dispersive X-ray spectroscopy. From the results of the measurements, it can be concluded that the surface-modified nanoparticles worked well with the overbased calcium sulfonate and significantly reduced both wear and friction. In the present tribology system, the optimal concentration of all three oxide ceramic nanoadditives is 0.4 wt%. By using oxide nanoparticles, friction can be reduced by up to 15% and the wear volume by up to 77%. Overbased calcium sulfonate and oxide ceramic nanoparticles together form a lower friction anti-wear boundary layer on the worn surfaces. The results of the tests represent another step toward the applicability of these nanoparticles in commercial engine lubricants. It is advisable to further investigate the possibility of formulating nanoparticles into the oil.

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“…For the tribological investigations, a self-developed measurement method was used. The measurement method was based on the international ISO 19291:2016 standard [14], and during the scientific research of the Department of Internal Combustion Engines and Propulsion Technology, have defined some modifications [15,16,17]. The used tribometer produces oscillation movement with 1 mm stroke and 50 Hz frequency, which moves the upper ball specimen on the plain surface of the disc specimen.…”

Section: Investigationsmentioning

confidence: 99%

Detection of the possible engine damages in case of a continuous track military vehicles with tribological investigations

Kuti¹,

Könczöl²,

Csapó³

et al. 2022

FME Transactions

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Detecting the engine failures of the continuous track military vehicles is challenging because their engines are always built-in narrow places covered with armored plates. In the case of the older engines, modern computer diagnostics cannot be used for failure analysis; the solution for these tasks is the visual analysis with the engine disassembly. A possible cost-effective failure analysis method can be the tribological and chemical analysis of the used oil from the engine, which can eliminate the engine disassembly work and as the results of the chemical oil analysis can also provide information about possible fuel or cooling water dilution or the increased wear of engine components. The main goal of this article is to present the failure analysis method through the tribological investigation of the engines of two PTSZ-M type medium-tracked amphibious military transport vehicles.

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Tribological investigation of applicability of nano-sized cupricoxide (CuO) ceramic material in automotive vehicles

Cited by 8 publications

References 27 publications

Tribological Properties of the Nanoscale Spherical Y2O3 Particles as Lubricant Additives in Automotive Application

Tribological Properties of the Nanoscale Spherical Y2O3 Particles as Lubricant Additives in Automotive Application

Tribological Investigation of the Effect of Nanosized Transition Metal Oxides on a Base Oil Containing Overbased Calcium Sulfonate

Detection of the possible engine damages in case of a continuous track military vehicles with tribological investigations

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