Comparative investigation of the influence of CaCO3 and SiO2 nanoparticles on lithium-based grease: Physical, tribological, and rheological properties

Razavi, Seyedreza; Sabbaghi, Samad; Rasouli, Kamal

doi:10.1016/j.inoche.2022.109601

Cited by 22 publications

(7 citation statements)

References 37 publications

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“…Wear phenomena are commonly present in the operation of modern machinery, and frictional resistance reduces the operating efficiency of machines. Wear can cause machine parts to fail or become damaged, greatly reducing the service life and reliability of the machine (Razavi et al , 2022). Rolling bearings are the core supporting components of rotating machinery, and in practical use, most bearing failures are caused by lubrication failure.…”

Section: Introductionmentioning

confidence: 99%

TiO₂ and CeO₂ nanoparticles as lithium complex grease additives for enhanced lubricity

Du,

He,

Wan

et al. 2024

ILT

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Purpose This paper aims to improve the tribological properties of lithium complex greases using nanoparticles to investigate the tribological behavior of single additives (nano-TiO2 or nano-CeO2) and composite additives (nano-TiO2–CeO2) in lithium complex greases and to analyze the mechanism of their influence using a variety of characterization tools. Design/methodology/approach The morphology and microstructure of the nanoparticles were characterized by scanning electron microscopy and an X-ray diffractometer. The tribological properties of different nanoparticles, as well as compounded nanoparticles as greases, were evaluated. Average friction coefficients and wear diameters were analyzed. Scanning electron microscopy and three-dimensional topography were used to analyze the surface topography of worn steel balls. The elements present on the worn steel balls’ surface were analyzed using energy-dispersive spectroscopy and X-ray photoelectron spectroscopy. Findings The results showed that the coefficient of friction (COF) of grease with all three nanoparticles added was low. The grease-containing composite nanoparticles exhibited a lower COF and superior anti-wear properties. The sample displayed its optimal tribological performance when the ratio of TiO2 to CeO2 was 6:4, resulting in a 30.5% reduction in the COF and a 29.2% decrease in wear spot diameter compared to the original grease. Additionally, the roughness of the worn spot surface and the maximum depth of the wear mark were significantly reduced. Originality/value The main innovation of this study is the first mixing of nano-TiO2 and nano-CeO2 with different sizes and properties as compound lithium grease additives to significantly enhance the anti-wear and friction reduction properties of this grease. The results of friction experiments with a single additive are used as a basis to explore the synergistic lubrication mechanism of the compounded nanoparticles. This innovative approach provides a new reference and direction for future research and development of grease additives. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-09-2023-0291/

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Section: Introductionmentioning

confidence: 99%

TiO₂ and CeO₂ nanoparticles as lithium complex grease additives for enhanced lubricity

Du,

He,

Wan

et al. 2024

ILT

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“…The application of nanotechnology to improve the tribological properties of lubricants gained increased interest in recent years. Various studies demonstrated that the addition of nanoparticles to lubricants can lead to a reduction in the coefficient of friction and wear rate, resulting in improved tribological performance [5][6][7][8][9][10][11][12]. Examples include the reduction in viscosity of lubricants depending on the density and size of micro-or nano-metal particles [5]; the micro-bearing effect at the friction interface of SiO 2 nanoparticles, leading to friction reduction [6]; and the development of eco-friendly oils with improved lubricity through adding SiO 2 nanoparticles to epoxidized Madhuca indica oil, resulting in a reduction in the coefficient of friction and wear rate [7].…”

Section: Introductionmentioning

confidence: 99%

“…Ionescu et al [10] studied the effectiveness of adding ZnO to rape-seed oil and found that the wear rate decreased with 1%wt ZnO, while the authors developed a new lubricant using dispersant at a 1:1 ratio to the additive. The impact of CaCO 3 and SiO 2 nanoparticles on lithium-based grease was investigated by Razavi et al [11], and the authors found that the nanogreases prepared with CaCO 3 and SiO 2 nanoadditives showed improved physical, tribological, and rheological properties. Bakalova et al [12] used nanoparticles of TiO 2 or SiO 2 in a cooling lubricant emulsion to reduce friction coefficient, wear of the cutting tool, and variance of measured values.…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Lubricants and Fly Ash Additive on Surface Damage Resistance under ASTM Standard Operating Conditions

et al. 2023

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This study investigated the effectiveness of lubricants and additives in preventing surface damage and wear, which is critical for numerous industrial applications. The ASTM standard operation conditions were employed for a series of experiments using a four-ball friction and wear tester, testing three different oils (A, B, and C) with and without 0.5% fly ash additive. The experiments were analyzed using a microscope to evaluate the effectiveness of oils and additives in preventing surface damage. The study found that certain anti-wear additives significantly reduced the size of wear scars on the balls, indicating their effectiveness in reducing surface damage. These findings have important implications for developing new lubricant formulations and optimizing industrial processes that involve sliding and rolling contacts. The study emphasizes the importance of selecting appropriate oils and additives for specific applications to minimize surface damage and wear, which is crucial for improving the performance and lifespan of machine components.

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“…The outcomes showed that the greases containing hBN nanoparticles (NPs) demonstrated the best antifriction (AF), antiwear (AW), and extreme-pressure (EP) characteristics. According to Razavi et al, the addition of different concentrations (0.5, 1, and 2 wt %) of calcium carbonate and silica nanoparticles improved the rheological and tribological characteristics of lithium-based greases. The enhancement in friction and wear indicated the ideal percentage of 1 wt %, and this improvment was caused by the development of a protective layer of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Lithium–Calcium Greases Having Carbon Nanotubes and Aluminum Oxide Base Nanoadditives: Preparation and Characteristics of Nanogrease

Kamel,

Naeem Awad,

Mobasher

et al. 2023

ACS Omega

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This research presents the results of the effect of different concentrations (2, 4, 6, and 8 wt %) of multiwall carbon nanotubes (MWCNTs) and aluminum oxide nanoparticles (Al2O3) on the characteristics of lithium–calcium grease (LCG). The LCG/Al2O3 and LCG/MWCNT were studied and illustrated by measuring the dropping point, consistency, thermal conductivity, and tribological characteristics of nanograins (wear, friction, and welding point) by using a four-ball tribometer. The morphologies of the additives and the nanogrease were examined and evaluated by X-ray diffraction and transmission electron microscopy. The worn surface of the ball surface was assessed by scanning electron microscopy. Based on the obtained results, the nanoadditive can significantly enhance the grease properties. The grease having a 4 wt % content of Al2O3 and MWCNT presented the lowest wear scar diameter and friction coefficient. Consequently, the welding point, dropping point, and thermal conductivity indicated that adding nanoadditives could strikingly enhance the lubricating effect of grease by 26, 32, and 75%, respectively. Finally, this study provides a lubricant with promising results that can be used under extreme pressure.

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Comparative investigation of the influence of CaCO3 and SiO2 nanoparticles on lithium-based grease: Physical, tribological, and rheological properties

Cited by 22 publications

References 37 publications

TiO₂ and CeO₂ nanoparticles as lithium complex grease additives for enhanced lubricity

TiO₂ and CeO₂ nanoparticles as lithium complex grease additives for enhanced lubricity

Effectiveness of Lubricants and Fly Ash Additive on Surface Damage Resistance under ASTM Standard Operating Conditions

Lithium–Calcium Greases Having Carbon Nanotubes and Aluminum Oxide Base Nanoadditives: Preparation and Characteristics of Nanogrease

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Comparative investigation of the influence of CaCO3 and SiO2 nanoparticles on lithium-based grease: Physical, tribological, and rheological properties

Cited by 22 publications

References 37 publications

TiO2 and CeO2 nanoparticles as lithium complex grease additives for enhanced lubricity

TiO2 and CeO2 nanoparticles as lithium complex grease additives for enhanced lubricity

Effectiveness of Lubricants and Fly Ash Additive on Surface Damage Resistance under ASTM Standard Operating Conditions

Lithium–Calcium Greases Having Carbon Nanotubes and Aluminum Oxide Base Nanoadditives: Preparation and Characteristics of Nanogrease

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Product

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TiO₂ and CeO₂ nanoparticles as lithium complex grease additives for enhanced lubricity

TiO₂ and CeO₂ nanoparticles as lithium complex grease additives for enhanced lubricity