Friction and wear property of lithium grease contained with copper oxide nanoparticles

Zheng, Bo; Zhou, Jin; Jia, Xianzhao; He, Qiang

doi:10.1007/s13204-019-01219-7

Cited by 18 publications

(7 citation statements)

References 16 publications

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“…Zheng et al [111] studied the friction and wear properties of lithium grease with addition of copper oxide (CuO) nanoparticles using a four-ball friction tester. The oil films were formed on wear surface providing decrease of friction and wear.…”

Section: Nanoparticles As Additive To Lithium Greasementioning

confidence: 99%

The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

Rylski

Siczek

2020

Lubricants

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The aim of the paper was to discuss different effects, such as, among others, agglomeration of selected nanoparticles, particularly those from zirconia, on the tribological behavior of lubricants. The explanation of the difference between the concepts of ‘aggregation’ and ‘agglomeration’ for ZrO2 nanoparticles is included. The factors that influence such an agglomeration are considered. Classification and thickeners of grease, the role of additives therein, and characteristics of the lithium grease with and without ZrO2 additive are discussed in the paper. The role of nanoparticles, including those from ZrO2 utilized as additives to lubricants, particularly to the lithium grease, is also discussed. The methods of preparation of ZrO2 nanoparticles are described in the paper. The agglomeration of ZrO2 nanoparticles and methods to prevent it and the lubrication mechanism of the lithium nanogrease and its tribological evaluation are also discussed. Sample preparation and a ball-on disc tester for investigating of spinning friction are described. The effect of ZrO2 nanoparticles agglomeration on the frictional properties of the lithium grease is shown. The addition of 1 wt.% ZrO2 nanoparticles to pure lithium grease can decrease the friction coefficient to 50%. On the other hand, the agglomeration of ZrO2 nanoparticles in the lithium grease can increase twice the friction coefficient relative to that for the pure grease.

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Section: Nanoparticles As Additive To Lithium Greasementioning

confidence: 99%

The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

Rylski

Siczek

2020

Lubricants

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“…Some solid lubricants (SLs) such as PTFE [8][9][10], MoS 2 [11], graphite [12,13], etc., have previously been shown as effective additives in grease formulations. Other lesser known SLs such as Talc [14], CaF 2 crystals [15], CaCO 3 [16], copper powder [17] and copper oxide [18] have shown some potential as anti-wear (AW), anti-friction (AF) and enhanced load-carrying capacity either alone or in combination. Carbon in various forms viz.…”

Section: Introductionmentioning

confidence: 99%

Tribological Investigations of Nano and Micro-sized Graphite Particles as an Additive in Lithium-Based Grease

2020

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Graphite is a well-known solid lubricant (SL) additive widely used both as a standalone SL and also as additive in lubricating oils, greases, composites, etc. Size of the additive particles especially nano-particles (NPs) is a major attribute to the performance properties of a composite, oil, grease, etc. This paper highlights the influence of graphite particles of four sizes viz. 50 nm, 450 nm, 4 microns and 10 microns incorporated in the grease in identical amount (4 wt. %) on the anti-friction (AF), anti-wear (AW) and extreme-pressure (EP) performance. The results indicated that all sizes proved beneficial for all the selected properties. Higher the size of particles, lower was the improvement in performance. The particles were most effective as anti-friction additive (AFA) followed by anti-wear additive (AWA) and then extreme-pressure additive (EPA). The NPs exhibited highest improvement as AFA (57%), AWA (41%) and EPA (25%). Raman Spectroscopy proved the formation of exfoliated graphitic layer on the worn surface of balls. Furthermore, SEM micrograph with elemental mapping and XPS spectroscopy analysis proved supportive in comprehending the mechanisms responsible for improved tribo-performance.

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“…Among metal-containing nanomaterials, the most detailed studies have been carried out with copper and its oxides. [3][4][5][6][7][8] Of particular interest are Cu-containing nanolubricants due to such important properties as small particle size, low melting point, and desired ductility. [9][10][11][12] As a result, they have excellent antiwear and extreme pressure characteristics compared to similar additives.…”

Section: Introductionmentioning

confidence: 99%

“…Among metal‐containing nanomaterials, the most detailed studies have been carried out with copper and its oxides [3–8] . Of particular interest are Cu‐containing nanolubricants due to such important properties as small particle size, low melting point, and desired ductility [9–12] .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Copper‐containing Nanocomposites by Thermolysis of Copper (II) Complex and Their Use as Anti‐friction and Anti‐wear Additives to Lubricant Oils

Drogan,

Tautieva,

Burlakova

et al. 2024

Zeitschrift anorg allge chemie

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A simple and accessible method has been developed for the preparation of copper‐containing nanocomposites by thermolysis of a copper(II) complex with a Schiff base based on 3‐formyl‐4‐hydroxycoumarin and octadecylamine at 500 °C. The resulting nanoparticles with a particle size of up to 85 nm were used as additives to lubricants. It has been established that copper oxide nanoparticles with a concentration of 0.5% and 1% increase the anti‐wear and anti‐friction properties of the lubricant.

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Friction and wear property of lithium grease contained with copper oxide nanoparticles

Cited by 18 publications

References 16 publications

The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

The Effect of Addition of Nanoparticles, Especially ZrO2-Based, on Tribological Behavior of Lubricants

Tribological Investigations of Nano and Micro-sized Graphite Particles as an Additive in Lithium-Based Grease

Preparation of Copper‐containing Nanocomposites by Thermolysis of Copper (II) Complex and Their Use as Anti‐friction and Anti‐wear Additives to Lubricant Oils

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