Impact of Multi-walled Carbon Nanotubes as an Additive in Lithium Grease to Enhance the Tribological and Dynamic Performance of Roller Bearing

Prasad, Deepak Kumar; Amarnath, M.; Chelladurai, H.

doi:10.1007/s11249-023-01763-y

Cited by 8 publications

(4 citation statements)

References 61 publications

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“…This improves the lubricant’s antiwear qualities and provides consistent performance over time. The lubricating mechanism of MWCNTs as additives is a complex combination of nanoscale and macroscale events, ,,, as shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Ultrasonics-Aided Dispersion of 1D Nanocarbons in Lubricating Oils For Enhanced Lubrication

Ravikiran,

Padya,

Jain

et al. 2024

Ind. Eng. Chem. Res.

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This work reports ultrasonics-aided dispersion of onedimensional (1D) multiwalled carbon nanotubes (MWCNTs) in an additive-free mineral base oil (BO) (group-2 dewaxed N500) and a commercial synthetic engine oil (CO) (ENI TriStar 15W40) to improve the oils' friction and wear-preventive properties. The lubricant additives, i.e., the MWCNTs, were prepared using a customized vertical fluidized bed reactor. The MWCNTs improved the BO's friction and wear-preventive properties and functioned synergistically with the predispersed additives in CO. Dispersing 0.1 wt % of the MWCNTs in BO improved the latter's antifriction property by 64%, and dispersing 0.1 wt % of MWCNTs in CO resulted in the reduction of the coefficient of friction (CoF) by 48%. The wear-preventive properties of the BO and CO improved by 60% and 30%, respectively, because of the addition of 0.1 wt % of MWCNTs. This work also clarifies the processes that improve lubrication performance, thereby decreasing friction and wear. This study advances the practical use of ultrasonication in process intensification in preparing stable 1D nanocarbon-additive lubricants with enhanced lubricating properties.

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Section: Resultsmentioning

confidence: 99%

Ultrasonics-Aided Dispersion of 1D Nanocarbons in Lubricating Oils For Enhanced Lubrication

Ravikiran,

Padya,

Jain

et al. 2024

Ind. Eng. Chem. Res.

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“…Agglomeration is more likely to develop around nanoparticles because of their high surface energy and the dominance of Van der Waals forces. 6,18,24 The nanoparticle size (<100 nm) of the grease substance may be to blame for the observed correlation between reinforcing quantity and improved characteristics. Grease material with increased reinforcement are still the subject of ongoing research and development.…”

Section: Friction and Wear Performance Test Of Nanocomposite Greasementioning

confidence: 99%

“…Incorporating graphene nanoparticles into the investigation aims to explore its potential as a lubricant additive and further improve the performance of lithium-based grease. 17,18 A variety of weight percent combinations of graphene (0.25, 0.5, 0.75 and 1 wt%) and lithium grease were attempted. A four-ball tribometer was used in order to conduct tests assessing anti-friction and wear.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation to assess the effect of graphene blended lithium grease on friction, wear, and surface morphology of 52100 chrome alloy steel contacts

Prasad,

Kamarapu,

Bhoi

et al. 2023

Lubrication Science

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The results of a research on the tribological behaviour of lithium grease with the addition of graphene nanoparticles are presented in current work. Using a four‐ball tribometer, the wear and friction coefficient of lithium grease and blended grease samples with graphene additions were assessed. The significance of graphene in enhancing the tribological properties of grease materials is evident from experimental results. In the experimental investigation, a considerable decrease in wear and friction co‐efficient values was also noted. One weight percent addition of graphene to base grease decreases friction by 23.73% and wear scar width by 19.51%.

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“…Rolling bearings are key components of the modern mechanical industry, and they are widely used in machine tools, wind power systems, automobiles and aviation equipment 1 – 6 . Grease is the fifth component of rolling bearings and plays the roles of reducing friction and preventing wear of rolling bearings.…”

Section: Introductionmentioning

confidence: 99%

Study of the changes in the microstructures and properties of grease using ball milling to simulate a bearing shear zone on grease

Ren,

Cai,

Zhao

et al. 2024

Sci Rep

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The effects of shear degradation on the microstructures and properties of grease were investigated using a planetary ball mill to simulate a bearing shear zone on grease. The microstructure, cone penetration, colloidal stability, rheological properties noise properties, water washout characteristics and low-temperature torque of lithium grease were characterized. The microstructure of the initial lithium grease is a three-dimensional network structure formed by the uniform fibers. The entanglement level is high. As the ball milling shear time increases, the network structure of lithium grease is destroyed and the fibers are sheared to become short. Eventually all of them become short fibers. The performance test of lithium grease reveal that the cone penetration increases, colloidal stability, structural strength, noise properties, water washout characteristics of lithium grease gradually decreased with the increase of ball milling shear time. Additionally, the low-temperature starting torque and running torque of the grease gradually decrease. This phenomenon occurs due to changes in the microstructure of lithium grease. The shear degradation of lithium grease was mainly divided into two stages: the rapid stage was the destruction of the thickener network structure and the fibers being shortened by shearing. The slow stage was the process in which short fibers were sheared into shorter fibers.

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Impact of Multi-walled Carbon Nanotubes as an Additive in Lithium Grease to Enhance the Tribological and Dynamic Performance of Roller Bearing

Cited by 8 publications

References 61 publications

Ultrasonics-Aided Dispersion of 1D Nanocarbons in Lubricating Oils For Enhanced Lubrication

Ultrasonics-Aided Dispersion of 1D Nanocarbons in Lubricating Oils For Enhanced Lubrication

Experimental investigation to assess the effect of graphene blended lithium grease on friction, wear, and surface morphology of 52100 chrome alloy steel contacts

Study of the changes in the microstructures and properties of grease using ball milling to simulate a bearing shear zone on grease

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