Tribological and rheological evaluation of a graphene nanosheets-based lubricant for metal-on-metal and wet clutch interfaces

Cao-Romero-Gallegos, Julio; Farfán-Cabrera, Leonardo Israel; Perez‐González, José; Marín-Santibáñez, Benjamín M.

doi:10.1016/j.matlet.2021.131441

Cited by 7 publications

(2 citation statements)

References 8 publications

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“…Wang 2022 [95] concluded that the addition of FLG to a lithium grease makes the grease more compact, with greater structural strength, yield strength, apparent viscosity, storage modulus, and loss modulus. Gallegos 2022 [70] concluded that GNS addition to MO made the lubricants non-Newtonian shear-thinning and increased their viscosity at high shear rates, helping to reduce the wear on the tested metallic interfaces, and enhanced the thermal stability and oil anti-shudder property of the wet clutch. Opposite behavior was seen on greases on [27] when the addition of GNP to greases produced an increase in viscosity at low shear rates and shear thinning at higher ones.…”

Section: Hydrodynamic Effectsmentioning

confidence: 99%

Review of Graphene-Based Materials for Tribological Engineering Applications

Tomanik,

Christinelli,

Souza

et al. 2023

Eng

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Graphene-based materials have great potential for tribological applications. Graphene’s unique properties such as low shear resistance, high stiffness, and thermal conductivity make it an attractive material for improving the properties of lubricants in a wide range of industrial applications, from vehicles to house refrigerators and industrial machinery such as gearboxes, large compressors, etc. The current review aims to give an engineering perspective, attributing more importance to commercially available graphene and fully formulated lubricants instead of laboratory-scaled produced graphene and base oils without additives. The use of lubricants with graphene-based additives has produced e.g., an increase in mechanical efficiency, consequently reducing energy consumption and CO2 emissions by up to 20% for domestic refrigerators and up to 6% for ICE vehicles. Potential effects, other than purely friction reduction, contributing to such benefits are also briefly covered and discussed.

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Section: Hydrodynamic Effectsmentioning

confidence: 99%

Review of Graphene-Based Materials for Tribological Engineering Applications

Tomanik,

Christinelli,

Souza

et al. 2023

Eng

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“…This relationship can be fitted to some empirical models, from which the pressure-viscosity dependence coefficient is obtained, this parameter usually decreases with increasing pressure but increases with increasing pressure above an inflection value [149][150][151]155]. Finally, when bio-oils are used as matrixes for dispersed micro or nanoparticles, the viscosity of the lubricant may become shear dependent (non-Newtonian behavior) with increasing particle concentration, then shear stability, namely, viscosity reduction as a function of shear or shear-thinning, should be investigated [152,154,156]. When flowing, non-Newtonian shear-thinning lubricants can decrease power consumption.…”

Section: Viscositymentioning

confidence: 99%

Microalgae Biomass as a New Potential Source of Sustainable Green Lubricants

et al. 2022

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Lubricants are materials able to reduce friction and/or wear of any type of moving surfaces facilitating smooth operations, maintaining reliable machine functions, and reducing risks of failures while contributing to energy savings. At present, most worldwide used lubricants are derived from crude oil. However, production, usage and disposal of these lubricants have significant impact on environment and health. Hence, there is a growing pressure to reduce demand of this sort of lubricants, which has fostered development and use of green lubricants, as vegetable oil-based lubricants (biolubricants). Despite the ecological benefits of producing/using biolubricants, availability of the required raw materials and agricultural land to create a reliable chain supply is still far from being established. Recently, biomass from some microalgae species has attracted attention due to their capacity to produce high-value lipids/oils for potential lubricants production. Thus, this multidisciplinary work reviews the main chemical-physical characteristics of lubricants and the main attempts and progress on microalgae biomass production for developing oils with pertinent lubricating properties. In addition, potential microalgae strains and chemical modifications to their oils to produce lubricants for different industrial applications are identified. Finally, a guide for microalgae oil selection based on its chemical composition for specific lubricant applications is provided.

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Wear performance of Ti-6Al-4 V titanium alloy through nano-doped lubricants

Etri

Singla

Özdemir

et al. 2023

Archiv.Civ.Mech.Eng

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Titanium and its alloys are widely utilized in the biomedical sector, they still exhibit poor tribological properties and low wear resistance when employed against even weaker substances. The poor hardness, instability, high coefficient of friction, low load-carrying capacity, and insufficient resistance to not only abrasive but also adhesive wear are further disadvantages of titanium alloys. The focus of this investigation is on the tribological performance of Ti-6Al-4 V alloy in contact with WC carbide abrasive balls when subjected to nanodoped cooling and lubrication conditions. Tribological experiments were executed on Ti-6Al-4 V flat samples using a ball-on-flat tribometer in dry hybrid graphene/boron nitride combination nanoparticles (MQL, nano-3), nanographene with MQL (nano-1), and boron nitride with MQL (nano-2) conditions. After that, the most significant tribological characteristics were investigated, including volume loss, friction coefficient, wear rate, and micrographic structures. The outcomes also demonstrated that the hybrid nanoparticle situation experienced the least amount of volume loss.

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Tribological and rheological evaluation of a graphene nanosheets-based lubricant for metal-on-metal and wet clutch interfaces

Cited by 7 publications

References 8 publications

Review of Graphene-Based Materials for Tribological Engineering Applications

Review of Graphene-Based Materials for Tribological Engineering Applications

Microalgae Biomass as a New Potential Source of Sustainable Green Lubricants

Wear performance of Ti-6Al-4 V titanium alloy through nano-doped lubricants

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