Friction and wear mechanisms of castor oil with addition of hexagonal boron nitride nanoparticles

Wang, Yongnan; Wan, Zhenping; Lu, Longsheng; Zhang, Zhihui; Tang, Yong

doi:10.1016/j.triboint.2018.03.035

Cited by 86 publications

(55 citation statements)

References 24 publications

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“…COF is the highest and at this state, the index lubrication value is known as the lambda value (λ) less than 1, which indicates the boundary lubrication regime at the Stribeck Curve [29]. As shown in Figure 14, SAE 40 clearly shows the highest friction compared to a lubricant that contents the CNC-CuO nanoparticle.…”

Section: Friction and Wear Behaviour At High Low-speed Load And High-mentioning

confidence: 96%

“…The coefficient of friction (COF) of base oil SAE 40 and nano lubricant at 0.1, 0.3 and 0.5 concentrations with low speed and high load is presented in Figure 14. At a low speed and high load, COF is the highest and at this state, the index lubrication value is known as the lambda value (λ) less than 1, which indicates the boundary lubrication regime at the Stribeck Curve [29]. As shown in Figure 14, SAE 40 clearly shows the highest friction compared to a lubricant that contents the CNC-CuO nanoparticle.…”

Section: Friction and Wear Behaviour At High Low-speed Load And High-mentioning

confidence: 97%

“…The coefficient of friction increases during the break-in stage, which usually takes 6-12 min [31]. At high speed and low load, the lambda value is always shows 1 until 3 and that indicates the mixed elastohydrodynamic lubrication, as proved by [29], and sometimes hydrodynamic lubrication, as proven by [30]. In this case, hydrodynamic lubrication is impossible since the time running the experiment is 30 min.…”

Section: Friction and Wear Behaviour At High Low-speed Load And High-mentioning

confidence: 99%

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Hybrid Nanocellulose-Copper (II) Oxide as Engine Oil Additives for Tribological Behavior Improvement

et al. 2020

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Friction and wear are the main factors in the failure of the piston in automobile engines. The objective of this work was to improve the tribological behaviour and lubricant properties using hybrid Cellulose Nanocrystal (CNC) and Copper (II) oxide nanoparticles blended with SAE 40 as a base fluid. The two-step method was used in the hybrid nanofluid preparation. Three different concentrations were prepared in a range of 0.1% to 0.5%. Kinematic viscosity and viscosity index were also identified. The friction and wear behavior were evaluated using a tribometer based on ASTM G181. The CNC-CuO nano lubricant shows a significant improvement in term of viscosity index by 44.3–47.12% while for friction, the coefficient of friction (COF) decreases by 1.5%, respectively, during high and low-speed loads (boundary regime), and 30.95% during a high-speed, and low load (mixed regime). The wear morphologies results also show that a smoother surface was obtained after using CNC-CuO nano lubricant compared to SAE 40.

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Section: Friction and Wear Behaviour At High Low-speed Load And High-mentioning

confidence: 96%

Section: Friction and Wear Behaviour At High Low-speed Load And High-mentioning

confidence: 97%

Section: Friction and Wear Behaviour At High Low-speed Load And High-mentioning

confidence: 99%

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Hybrid Nanocellulose-Copper (II) Oxide as Engine Oil Additives for Tribological Behavior Improvement

et al. 2020

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“…It also made it used in electrical brushes for its low friction coefficient and high wear-resistant properties. 1–5…”

Section: Introductionmentioning

confidence: 99%

Microstructure, hardness, and tribology properties of the (Cu/MoS₂)/graphene nanocomposite via the electroless deposition and powder metallurgy technique

Yehia

Abu-Oqail

Elmaghraby³

et al. 2020

Journal of Composite Materials

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To increase the strength and to reduce the wear rate of the copper composite that used as a solid self-lubricant materials, Cu/10MoS2/ (0, 0.2, 0.4, 0.6, 0.8, and 1 wt.% graphene nanosheets) hybrid matrix nanocomposites were fabricated using the electroless copper precipitation process followed by the cold pressing and sintering in a hydrogen atmosphere furnace with a double-heating rate cycle. The microstructure of the as-received powders, as well as the produced samples, was examined using the scanning electron microscope. The chemical composition of the fabricated composites was evaluated by the energy dispersive spectrometry analysis. The effect of the graphene nanosheets (wt.%) addition on the densification, the hardness, the adhesive wear rate, the wear mechanism, and the coefficient of friction was investigated. The low heating rate of 5℃/min was the best for the fabrication process. The microstructure of the composites reveals the good distribution of the (graphene nanosheets and MoS2) in the copper matrix and good adhesion between graphene nanosheets and the (Cu-10MoS2) matrix as well. The 0.4 wt.% graphene nanosheets composite exhibits the highest hardness, the lowest wear rate, and the lowest coefficient of friction. The adhesive regions were dissipated by increasing the graphene nanosheets up to 0.6 wt.% then increased.

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“…Particularly, hexagonal boron nitride (h‐BN), a typical layered 2D material, has unique structure in which van der Waals forces exist between two covalently bonded sheets. Accordingly, h‐BN exhibits superior mechanical strength and can easily shear at the contact interfaces as employed as lubricant additives 6‐12 . Gupta et al 6 investigated the influence of the h‐BN particle sizes on tribo‐performances of the filled oils and found that all of the nano‐, submicron‐, and micron‐sized h‐BN particles exhibited better tribological performances than the base oil.…”

Section: Introductionmentioning

confidence: 99%

Functionalised h‐BN as an effective lubricant additive in PAO oil for MoN coating sliding against Si₃N₄ ball

Liu

Tang

et al. 2020

Lubrication Science

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Hexagonal boron nitride (h‐BN) exhibits great potential for tribological applications due to its attractive 2D layered structure. In this work, functionalised hexagonal boron nitride (f‐BN) was prepared by ultrasonic exfoliation of pristine h‐BN in water and subsequent hydrothermal modification with sodium oleat. Fourier infrared spectra and X‐ray photoelectron spectra analyses showed that long alkyl‐chains were successfully grafted on the surface of f‐BN by modification process. The tribological properties of the as‐prepared f‐BN as lubricant additive in poly‐alpha‐olefin 10 (PAO10) for lubricating MoN coating sliding against Si3N4 ball were evaluated by a ball‐on‐disc friction tester. The friction coefficient and wear rate of the oil dispersed with 2 mg/mL f‐BN was respectively reduced by 42% and 29% in comparison with the pure PAO10 oil, suggesting that f‐BN was an effective lubricating additive for reducing friction and wear. Finally, the lubricating mechanism of f‐BN dispersed in PAO10 was discussed and proposed.

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Friction and wear mechanisms of castor oil with addition of hexagonal boron nitride nanoparticles

Cited by 86 publications

References 24 publications

Hybrid Nanocellulose-Copper (II) Oxide as Engine Oil Additives for Tribological Behavior Improvement

Hybrid Nanocellulose-Copper (II) Oxide as Engine Oil Additives for Tribological Behavior Improvement

Microstructure, hardness, and tribology properties of the (Cu/MoS₂)/graphene nanocomposite via the electroless deposition and powder metallurgy technique

Functionalised h‐BN as an effective lubricant additive in PAO oil for MoN coating sliding against Si₃N₄ ball

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Friction and wear mechanisms of castor oil with addition of hexagonal boron nitride nanoparticles

Cited by 86 publications

References 24 publications

Hybrid Nanocellulose-Copper (II) Oxide as Engine Oil Additives for Tribological Behavior Improvement

Hybrid Nanocellulose-Copper (II) Oxide as Engine Oil Additives for Tribological Behavior Improvement

Microstructure, hardness, and tribology properties of the (Cu/MoS2)/graphene nanocomposite via the electroless deposition and powder metallurgy technique

Functionalised h‐BN as an effective lubricant additive in PAO oil for MoN coating sliding against Si3N4 ball

Contact Info

Product

Resources

About

Microstructure, hardness, and tribology properties of the (Cu/MoS₂)/graphene nanocomposite via the electroless deposition and powder metallurgy technique

Functionalised h‐BN as an effective lubricant additive in PAO oil for MoN coating sliding against Si₃N₄ ball