Graphene: a new emerging lubricant

Berman, Diana; Erdemir, Ali; Sumant, Anirudha V.

doi:10.1016/j.mattod.2013.12.003

Cited by 1,264 publications

(650 citation statements)

References 51 publications

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“…Here, it must be noted that the graphene oxide nanosheets (e.g. the defects near the anode) can also be a good corrosion-inhibiting coating with a superfine abrasion performance, as reported in the previous studies [1][2][3][4]20]. 8 In general, it requires at least 10 kV high voltage to drive the large-sized particles (>200 μm) to move on an insulator substrate [12,13].…”

Section: Resultsmentioning

confidence: 78%

“…Reducing friction and wear-related mechanical failures in moving mechanical systems still remains a huge challenge due to friction's adverse impacts on efficiency, durability, and environmental compatibility [1][2][3]. Accordingly, increasing attention has been paid to develop new materials, coatings, and lubricants that can potentially provide low friction and wear even under severe operating conditions [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, increasing attention has been paid to develop new materials, coatings, and lubricants that can potentially provide low friction and wear even under severe operating conditions [1][2][3]. Graphene, a two-dimensional carbon materials, was only very recently explored that it had unusual properties to reduce wear and friction in nano-scale to macro-scale systems due to the interplay of surface traction forces [4] and the effect of electron-phonon coupling [5].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of surface coatings on a conductive substrate by controlled motion of graphene nanoflakes in a liquid medium

Zhang

Qin

2015

Applied Surface Science

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Controlled motion of graphene and graphene oxide nanoflakes in a thin liquid film on metal surfaces was studied to unravel the significant variations of the electric field effects on the nanoparticles. It was found that graphene oxide flakes were negatively charged and migrated toward anode while the electrically neutral graphene flakes moved toward cathode. Therefore, thin layers of graphene as a protective coating were produced to inhibit corrosion of underlying metals and reduce friction and wear-related mechanical failures in moving mechanical systems. The method does not require an insulated substrate to confine the high electric field to the fluidic layer. The motion of the nano-particles under pulsed electric current was very efficient. The observed effects were interpreted in a possible mechanism associated to the effect of electric field on the mobility of different particles in different conductive media. This significant phenomenon, combined with unique properties of graphene and graphene oxides, represents an exciting platform for enabling diverse applications on the preparation of protective coatings on an arbitrary conductive substrate over large areas.

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Section: Resultsmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Preparation of surface coatings on a conductive substrate by controlled motion of graphene nanoflakes in a liquid medium

Zhang

Qin

2015

Applied Surface Science

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“…The basal planes are preferably and substantially oriented parallel to the surface. Carbon materials and graphites are low surface energy solids and when they are exposed to each other damages can occur, dangling bonds, into the basal plane, and as a consequence, higher surface energy regions are exposed resulting in enhanced surface adhesion [5,6,7]. The friction and wear are reduced if these regions are neutralized by the action of active gases such as water vapor.…”

Section: Introductionmentioning

confidence: 99%

“…The interaction of a third body and the moisture form a lubricating film by physical adsorption phenomena. This effect decreases the interaction between the contact faces, reducing the adhesion between them and consequently, results in a decrease in the friction coefficient [5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Influence of basal plane domains in the tribological behavior of graphites

Souza

Pardini

2016

Matéria (Rio J.)

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Many dynamic engineering systems have interferences and interactions that causes wear under friction effect. Carbonaceous materials, such as polycrystalline graphites, are of great interest in engineering systems due to their inherent lubricant properties and their versatility as a material for applications in the areas of mechanics, transportation, energy systems and sensitive technologies. In this work the tribological behavior of three identical pairs, pin-on-disc, of commercial polycrystalline graphites were evaluated, in a controlled environment at 20 °C and 50 % RH. Results of tribological behavior were correlated considering the prevalence of basal plane, identified by polarized light optical microscopy, as a function of the tribological behavior, measured by tests with pin on disc tribometer. The results showed that the coefficient of friction behavior is directly related to the basal plane mosaic domain and the extension of the damage generated on this plane due to the contact between the tribological pair. The materials studied presented an increase in the friction coefficient values, 0,10; 0;13 and 0,23 with increasing area of the basal plane mosaic domain, respectively 55; 64 and 81% respectively.

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