Self-lubrication and wear-resistance mechanism of graphene-modified coatings

Ai, Zhang; feng, Gong Xiao; Ping, Yu; Qin, Xing; Ping, Xu; xun, Wang Zhong

doi:10.1016/j.ceramint.2020.03.140

Cited by 16 publications

(8 citation statements)

References 17 publications

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“…In this process, the nano-sized powder particles are dispersed in an organic binder to form slurry and then the slurry is passed through an atomizing orifice into a hot chamber. The droplets coming out of the orifice dry and form micron size agglomerates of coating powder [20]. Amudha et.al.…”

Section: Introductionmentioning

confidence: 99%

Development of Graphene Nanoplatelets Reinforced HVOF sprayed Cr3C2-NiCr Coatings

Chauhan,

Variya,

Solanki

et al. 2024

JTSE

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Thermal sprayed coatings are widely used for wear and corrosion resistant applications in various industrial applications as they have less porosity, higher hardness, and fracture toughness. The Properties of these coatings can be improved further by reinforcing them with nanomaterials. In recent years, nanomaterials have found their applications in diversified fields including composite materials, owing to their excellent mechanical properties. A wide range of nanomaterials such as nano-carbonaceous materials, nano-rare earth oxides, and nano-ceramics have been used as reinforcements in thermal sprayed coatings, leading to enhancement in the coating properties. However, homogeneous blending of the nanoreinforcement materials with coating powders is challenging as the nanomaterials have an affinity to form agglomerates due to van der Waals forces. Although various mixing methods are employed by the researchers such as mechanical ball milling and spray drying for mixing, they have some limitations. Here, an attempt has been made to develop a mixing method with which the nanomaterials can be uniformly mixed with the coating powder. In the present work, authors have prepared graphene nanoplatelets (GNP) reinforced cermet feedstock powder Cr3C2-NiCr for the HVOF spray process by three methods: 1. Dry ball milling, 2. 3-D tumbler mixing, and 3. a method involving the process of ultrasonication & 3-D tumbler mixing. Through FE-SEM with EDS analysis, it was observed that method-3 yielded homogeneously mixed composite powder. XRD and Raman spectroscopy were also carried out to identify the phases and to confirm GNP retention.

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Section: Introductionmentioning

confidence: 99%

Development of Graphene Nanoplatelets Reinforced HVOF sprayed Cr3C2-NiCr Coatings

Chauhan,

Variya,

Solanki

et al. 2024

JTSE

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“…It is due to the excellent physical and chemical properties of graphene that it has been used in semiconductors [14,15], energy [16,17], functional coating [18], composite materials [19], aerospace [20], and other fields [21,22]. Consequently, graphene material possesses excellent physical and chemical properties as a tool coating material in the tool industry and has important practical significance and practical value [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

“…Coatings 2022, 12, 1385 2 of 15 Berman et al investigated the impact of graphene-based ethanol solution on the tribological properties of steel and demonstrated that graphene-based ethanol solution reduced the wear of steel by four orders of magnitude and lowered the friction coefficient by one sixth [26]. It is proved that graphene plays an important role in wear resistance and wear reduction [23,27]. The mechanism of friction reduction is that graphene forms a protective film that is easy to shear at the friction interface [28].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Tribological Properties of Graphene-Based Coatings on Tungsten Carbide

Liu

Ren

et al. 2022

Coatings

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The preparation technology of graphene-based coatings on cobalt-based cemented carbides and the friction properties of graphene-based coatings were researched. Based on cooling rate, growth temperature, and methane flow rate, Raman spectroscopy was used to evaluate the influence of chemical vapor deposition (CVD) on graphene-based coatings. The results show that at the growth temperature of 1000 °C, the cooling rate of 15 °C/min and methane flow rate of 10 sccm are more favorable for the growth of pure graphene coating with fewer layers on a cemented carbide surface. As methane flow boosts, the number of graphene layers increases and amorphous carbon is generated. The resulting tribological properties demonstrate that the friction coefficient of graphene-based coatings decreases as the friction load increases. The above results indicate that the graphene-based coating on a cemented carbide surface can be prepared by regulating its composition and defects through technological parameters, and it is viable to use graphene-based coating as anti-wear coating for cutting tools. The results provide a reference for the preparation and properties of cemented carbide surface graphene.

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“…The use of graphene as a solid lubricant is based on a different friction-reducing mechanism, which takes advantage of the extremely easy glide between graphene flakes during incommensurate interface contact [6,[9][10][11] by the formation of multiple transferred Coatings 2022, 12, 1153 2 of 15 graphene nanoflakes on the asperities of sliding surfaces [12]. As the self-lubricating mechanisms of graphene operate independently of the presence of external lubricants, graphene can be used as a component of both bulk materials [13,14] and coatings [15][16][17][18][19][20][21][22][23][24]. The latter solution seems to be particularly promising, because graphene used as an additive in coatings displays various other characteristics, e.g., anticorrosive [25,26] or biologically active properties [27,28], allowing the achievement of a synergic effect with a properly selected matrix material.…”

Section: Introductionmentioning

confidence: 99%

“…Table 1. Average coefficients of friction (COF) and testing distances of various composite coatings containing graphene [15][16][17][18][19][20][21][22][23][24]. MgO/SiO + GO [22] Mg-Li alloy Micro-arc oxidation 0.15 >63…”

Section: Introductionmentioning

confidence: 99%

Morphology and Structure of Al2O3 + Graphene Low-Friction Composite Coatings

Miszczak

Pietrzyk

2022

Coatings

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Recently, graphene and its derivatives have been of particular interest as a solid lubricant to reduce friction. The aim of this study was to investigate the morphology and structure of low-friction Al2O3 coatings containing reduced graphene oxide (rGO). Using two types of rGO, alumina coatings were produced by the sol–gel dip-coating method and characterized in terms of morphology and structure using SEM and AFM microscopy and Raman spectroscopy. It was found that composite Al2O3 + rGO coatings had diversified morphology depending on the type of graphene used. The dip-coating method used for deposition had a large impact on the morphology and contributed to the orderly arrangement of rGO nanoplates in the coating matrices. It was also shown that there is a correlation between the shape and spatial orientation of nanoplates and the tribological properties of coatings. The structural studies showed differences in the number of graphene defects in the coatings, which may indicate the chemical bonding of graphene with the alumina matrices. These differences may also be responsible for divergences in the tribological properties of the coatings depending on the type of graphene. All our findings indicate the key role of an appropriate balance between the parameters of composite coating production in terms of the desired tribological properties.

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Self-lubrication and wear-resistance mechanism of graphene-modified coatings

Cited by 16 publications

References 17 publications

Development of Graphene Nanoplatelets Reinforced HVOF sprayed Cr3C2-NiCr Coatings

Development of Graphene Nanoplatelets Reinforced HVOF sprayed Cr3C2-NiCr Coatings

Preparation and Tribological Properties of Graphene-Based Coatings on Tungsten Carbide

Morphology and Structure of Al2O3 + Graphene Low-Friction Composite Coatings

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