Review of Graphene-Based Materials for Tribological Engineering Applications

Tomanik, Eduardo; Christinelli, Wania; Souza, Roberto M.; Oliveira, Vanessa L.; Ferreira, Fabio; Zhmud, Boris

doi:10.3390/eng4040157

Cited by 5 publications

(5 citation statements)

References 165 publications

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“…A second advantage over conventional plastics is its demonstrated high mechanical strength, which enables novel applications. First, we demonstrate the application of z-laminated graphene as tribological coatings (Figure b). For this purpose, graphene films were deposited onto Si/SiO 2 samples, and the friction coefficient was characterized through a sliding test.…”

Section: Resultsmentioning

confidence: 99%

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Santos,

Tjarks,

Muthu

et al. 2024

ACS Appl. Nano Mater.

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We demonstrate the strengthening of graphene, an atomically thin carbon allotrope, by out-of-plane folding. Through lateral confinement of graphene at the water−air interface, nanoscale buckling was induced in suspended flakes, leading to an unexpected folding transition beyond a critical surface pressure. The emergence of folding was confirmed by in situ Brewster angle reflectivity and ex situ microscopy, showing a unique "z-laminated" nanostructure. Molecular dynamics simulations indicate that zlamination yields an enhanced adhesion between neighboring flakes compared to lateral sliding, which was confirmed by a surface pressure hysteresis during the folding process. Mechanical testing reveals superior Young's modulus and yield strength when compared to conventional graphene assemblies and even compared to composites. We demonstrate the potential of the z-lamination approach for applications in graphene-based structural materials, tribological layers, and functional electrochemical coatings. Finally, the complete recyclability of z-laminated graphene opens up new routes toward sustainable nanostructured materials.

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Section: Resultsmentioning

confidence: 99%

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Santos,

Tjarks,

Muthu

et al. 2024

ACS Appl. Nano Mater.

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“…As a contribution, the tribological optimization of the cylinder liner surface of the aluminum alloy reciprocating air compressor was realized. The main goal is to increase wear resistance as well as reduce mechanical losses within the piston and the cylinder liner assembly [69,70].…”

Section: Contribution To Research In the Area Of Reducing Pm Emission...mentioning

confidence: 99%

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

Milojević,

Glišović,

Savić

et al. 2024

Atmosphere

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Regardless of the increasingly intensive application of vehicles with electric drives, internal combustion engines are still dominant as power units of mobile systems in various sectors of the economy. In order to reduce the emission of exhaust gases and satisfy legal regulations, as a temporary solution, hybrid drives with optimized internal combustion engines and their associated systems are increasingly being used. Application of the variable compression ratio and diesel fuel injection timing, as well as the tribological optimization of parts, contribute to the reduction in fuel consumption, partly due to the reduction in mechanical losses, which, according to test results, also results in the reduction in emissions. This manuscript presents the results of diesel engine testing on a test bench in laboratory conditions at different operating modes (compression ratio, fuel injection timing, engine speed, and load), which were processed using a zero-dimensional model of the combustion process. The test results should contribute to the optimization of the combustion process from the aspect of minimal particulate matter emission. As a special contribution, the results of tribological tests of materials for strengthening the sliding surface of the aluminum alloy piston and cylinder of the internal combustion engine and air compressors, which were obtained using a tribometer, are presented. In this way, tribological optimization should also contribute to the reduction in particulate matter emissions due to the reduction in fuel consumption, and thus emissions due to the reduction in friction, as well as the recorded reduction in the wear of materials that are in sliding contact. In this way, it contributes to the reduction in harmful gases in the air.

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“…The graphene used in this study is reduced graphene oxide (rGO), which not only possesses the exceptional properties, but also exhibits favorable economic performance, thereby being employed as the reinforced doping material. It is typically prepared through an electrothermal reduction process, aiming to eliminate the oxygen-containing functional groups present on the graphene oxide surface [23,24]. In this study, commercially available rGO (specific surface area 500 ± 50 m 2 /g, oxygen content ≤ 15%, transverse dimension 20 µm, thickness ≤ 5nm) was used, which purchased from Jiangsu Xianfeng Nanomaterials Technology Co., Ltd., Nanjing, China.…”

Section: Raw Materialsmentioning

confidence: 99%

“…It is unable to achieve the coordinated improvement of the comprehensive performance. Graphene, as a new two-dimensional carbon material rising in recent years, has remarkable advantages such as high electrical conductivity, high thermal conductivity, high specific surface area, light weight, and high strength [23][24][25][26][27][28][29][30]. It will be an ideal material for the modification of CuW composites, and is expected to bring more excellent comprehensive properties as an additive modification phase.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

Liu,

Han,

Jia

et al. 2024

Applied Sciences

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To address the issue of over-standard short-circuit currents in a power system, it is imperative to enhance the comprehensive performance of the electrical contacts, which serve as the lynchpin of circuit breakers, so as to improve the breaking capacity of high-voltage circuit breakers. Graphene, as the most prominent two-dimensional carbon material in recent years, has garnered widespread applications across various fields. In this study, graphene-enhanced CuW composites for high-voltage circuit breaker electrical contacts were prepared innovatively using integrated vacuum infiltration technology. The innovative graphene-enhanced CuW composites significantly improved the mechanical, electrical, and ablation resistance properties, and have been successfully applied in the 252 kV/63 kA high-voltage SF6 circuit breakers, achieving 20 times effective consecutive full-capacity short-circuit current breaking. It provides a new route for the development and application of high-performance CuW electrical contacts. Looking ahead, it is planned to extend their application to higher voltage grade high-voltage circuit breakers.

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Review of Graphene-Based Materials for Tribological Engineering Applications

Cited by 5 publications

References 165 publications

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Z-Laminating Assembly of Graphene Nanoflakes for Super-Strong Membranes and Functional Coatings

Particulate Matter Emission and Air Pollution Reduction by Applying Variable Systems in Tribologically Optimized Diesel Engines for Vehicles in Road Traffic

Graphene-Enhanced CuW Composites for High-Voltage Circuit Breaker Electrical Contacts

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