Synergistic tribological behaviors of graphene oxide and nanodiamond as lubricating additives in water

Wu, Pu; Chen, Xinchun; Zhang, Chenhui; Luo, Jianbin

doi:10.1016/j.triboint.2018.12.021

Cited by 76 publications

(24 citation statements)

References 33 publications

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“…The EDS results indicated the formation of a uniform carbon-rich layer after the wear process in 2 rGO composites. The formation of a tribofilm also explained the reduction of COF as discussed previously (Wu et al, 2019). Figure 9 shows the fresh and worn surfaces of the 1 rGO + 1 CNT composites.…”

Section: Wear Track Microstructuresupporting

confidence: 66%

Friction and Wear Behaviors of Reduced Graphene Oxide- and Carbon Nanotube-Reinforced Hydroxyapatite Bioceramics

et al. 2020

Front. Mater.

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Friction and wear properties play an important role in the long-term in vivo performance of load-bearing bioceramic implants. In this study, the friction and wear behaviors of hydroxyapatite (HA) reinforced with reduced graphene oxide (rGO) and rGO + carbon nanotube (CNT) hybrids were studied by ball-on-disk tests to understand the effects of nanocarbon content and morphology on the composites’ tribological behaviors. The intact and worn surfaces were characterized by optical microscopy, nanoindentation, field emission scanning electron microscopy, energy-dispersive X-ray spectroscopy, and Raman spectroscopy. We found that the incorporation of rGO and rGO + CNT hybrids in HA bioceramic both improved the friction and wear behaviors, and the highest wear resistance was achieved by employing 1 wt% rGO and 1 wt% CNT as reinforcements. The major reinforcing mechanism was the formation of carbonaceous films between the composite surfaces and counterbody, which served as solid lubrication films that resulted in a lower coefficient of friction, higher hardness, and increased hardness/modulus ratio. Importantly, CNT addition facilitated the uniform distribution of the reinforcements in the HA matrix and the pinning effects of CNT enhanced the connection between rGO and HA.

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Section: Wear Track Microstructuresupporting

confidence: 66%

Friction and Wear Behaviors of Reduced Graphene Oxide- and Carbon Nanotube-Reinforced Hydroxyapatite Bioceramics

et al. 2020

Front. Mater.

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“…Thereafter, they found that the liquid-superlubricity state with μ = 0.005 for Si 3 N 4 -sapphire tribopairs can be achieved through the combination of grapheneoxide nanosheets and ionic liquid [24]. As reported by Wu et al [25], a low friction coefficient and minuscule wear track can be obtained in the Si 3 N 4 /Si tribosystem because of the synergistic effect between graphene oxide and nanodiamond as lubrication additives in water. The detonation nanodiamond particle (NDP) is another candidate that has attracted attention.…”

Section: Introductionmentioning

confidence: 87%

Low friction in self-mated silicon carbide tribosystem using nanodiamond as lubricating additive in water

2020

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Nanodiamond particles (NDPs) have been considered as a potential lubricant additive to various tribological applications, such as water lubrication systems. In this study, the tribological properties of silicon carbide (SiC) lubricated by NDPs dispersed in water are investigated utilizing the ball-on-disk tribometer. It is found that the slight addition of NDP to water (i.e., 0.001 wt%) can distinctly accelerate the running-in process, which is necessary to achieve a friction coefficient (μ) as low as 0.01. This study also discusses two NDP functional terminations —hydroxyl and carboxyl. It is demonstrated that the use of carboxyl-terminated NDP over a wide range of concentration (0.001 wt%–1 wt%) yields a low friction force. In contrast, the ideal effective concentration of hydroxyl-terminated NDP is considerably limited because agglomeration in this material is more probable to occur than in the former. Meanwhile, when utilizing NDPs, the input friction energy (Pin, defined as the product of sliding speed and applied load) is found to have an essential function. Several sliding tests were implemented at various Pin values (50–1,500 mW) using carboxyl-terminated water-dispersed NDPs. It was observed that the μ and wear decreased with increasing Pin when 200 mW < Pin < 1,500 mW. However, when Pin < 200 mW, low friction with high wear occurs compared with the resulting friction and wear when pure water is used.

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“…Diamonds are the hardest substance in natural products. Wu et al [73] mixed GO with nanodiamond and found that the novel lubricant had excellent performance. A COF of approximately 0.03 was obtained for aqueous solution with 0.1 wt% GO and 0.5 wt% nanodiamond.…”

Section: Go-carbonaceous Nanoparticle Compositementioning

confidence: 99%

Water lubrication of graphene oxide-based materials

Xue

Guo

et al. 2021

Friction

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Water is as an economic, eco-friendly, and efficient lubricant that has gained widespread attention for manufacturing. Using graphene oxide (GO)-based materials can improve the lubricant efficacy of water lubrication due to their outstanding mechanical properties, water dispersibility, and broad application scenarios. In this review, we offer a brief introduction about the background of water lubrication and GO. Subsequently, the synthesis, structure, and lubrication theory of GO are analyzed. Particular attention is focused on the relationship between pH, concentration, and lubrication efficacy when discussing the tribology behaviors of pristine GO. By compounding or reacting GO with various modifiers, amounts of GO-composites are synthesized and applied as lubricant additives or into frictional pairs for different usage scenarios. These various strategies of GO-composite generate interesting effects on the tribology behaviors. Several application cases of GO-based materials are described in water lubrication, including metal processing and bio-lubrication. The advantages and drawbacks of GO-composites are then discussed. The development of GO-based materials for water lubrication is described including some challenges.

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Synergistic tribological behaviors of graphene oxide and nanodiamond as lubricating additives in water

Cited by 76 publications

References 33 publications

Friction and Wear Behaviors of Reduced Graphene Oxide- and Carbon Nanotube-Reinforced Hydroxyapatite Bioceramics

Friction and Wear Behaviors of Reduced Graphene Oxide- and Carbon Nanotube-Reinforced Hydroxyapatite Bioceramics

Low friction in self-mated silicon carbide tribosystem using nanodiamond as lubricating additive in water

Water lubrication of graphene oxide-based materials

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