scholarly journals Research Progress of Nano Copper Lubricant Additives on Engineering Tribology

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2006
Author(s):  
Junde Guo ◽  
Yingxiang Zhao ◽  
Biao Sun ◽  
Puchao Wang ◽  
Zhijie Wang ◽  
...  
Keyword(s):  
Lubricant Additive ◽  
Friction Reduction ◽  
Research Progress ◽  
Lubricating Oil ◽  
Self Healing ◽  
Boundary Slip ◽  
Copper Particles ◽  
Oil Additives ◽  
Engineering Significance ◽  
Lubricating Oil Additives

Nanoparticles have as characteristics super sliding, extreme pressure, self-healing, etc., which can improve the friction reduction and anti-wear performance of sliding components, when used as lubricating oil additives. Nano-copper particles have a good synergistic effect with other antifriction agents, anti-wear agents, antioxidants and grease additives because of their low shear strength and grain boundary slip effect, showing a better anti-friction and anti-wear effect. However, nanoparticles are prone to conglomerate, and this causes a bottleneck in the application of dispersant for nano-copper in a lubricating oil system. The regulation of nanosized effect and surface properties has great engineering significance in compensating for the precision in manufacturing accuracy. This paper comprehensively reviews the tribological research progress of nano-copper as a lubricant additive, which provides a reference to the application of nano-copper particles as lubricating oil additives on engineering tribology.

scholarly journals The Application of Nano-MoS2 Quantum Dots as Liquid Lubricant Additive for Tribological Behavior Improvement

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 200 ◽  
Author(s):  
Guo ◽  
Peng ◽  
Du ◽  
Shen ◽  
Li ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Friction And Wear ◽  
Ball Bearing ◽  
Lubricant Additive ◽  
Lubricating Oil ◽  
Liquid Lubricant ◽  
Engine Efficiency ◽  
Oil Additives ◽  
Lubricating Oil Additives ◽  
Ball On Disc

Molybdenum disulfide quantum dots (MoS2 QDs) are a promising lubricant additive for enhanced engine efficiency. In this study, MoS2 QDs were used as lubricating oil additives for ball-on-disc contact and had adequate dispersity in paroline oil, due to their super small particle size (~3 nm). Tribological results indicate that the friction coefficient of paroline oil with 0.3 wt.% MoS2 QDs reached 0.061, much lower than that of pure paroline oil (0.169), which is due to the formation of a stable tribo-film formed by the MoS2, MoO3, FeS, and FeSO4 composite within the wear track. Synergistic lubrication effects of the tribo-film and ball-bearing effect cooperatively resulted in the lowest friction and wear.

Tribological Properties of Zirconium Oxide, Spinel and Mullite Nanopowders as Lubricating Oil Additives

2016 ◽  
Vol 721 ◽  
pp. 451-455
Author(s):  
Armands Leitans ◽  
Eriks Palcevskis
Keyword(s):  
Tribological Properties ◽  
Zirconium Oxide ◽  
Friction Pair ◽  
Synthesis Method ◽  
Lubricating Oil ◽  
Nanosized Powders ◽  
Base Oil ◽  
Oil Additives ◽  
Oxide Spinel ◽  
Lubricating Oil Additives

In work investigated effects of zirconium oxide (ZrO2), spinel (MgAl2O4) and mullite (Al6Si2O13) nanosized powders on the base oil tribological properties. The nanosized (30-40nm) powders manufactured by plasma chemical synthesis method. Tribological experiments used on ball-on-disc type tribometer, measured coefficient of friction and determined metalic disc wear. Base oil used selectively purified mineral oil (conform SAE-20 viscosity) without any functional additives. Nanosized powders dispersed in base oil at 0.5; 1.0; 2.0; wt.%. At work cocluded, that the adition nanoparticles in base oil, possible reduced friction pair wear and friction coefficient. As the main results include spinel (MgAl2O4) nanoparticles 0.5 and 1.0 wt. % concentration ability reduced friction coeffiecient value.

Tribological performance of nanoparticles as lubricating oil additives

2016 ◽  
Vol 18 (8) ◽  
Author(s):  
M. Gulzar ◽  
H. H. Masjuki ◽  
M. A. Kalam ◽  
M. Varman ◽  
N. W. M. Zulkifli ◽  
...  
Keyword(s):  
Tribological Performance ◽  
Lubricating Oil ◽  
Oil Additives ◽  
Lubricating Oil Additives

Synthesis and Tribological Properties of S- and P-Free Borate Esters With Different Chain Lengths

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Guangbin Yang ◽  
Zhanming Zhang ◽  
Guihui Li ◽  
Jinfeng Zhang ◽  
Laigui Yu ◽  
...  
Keyword(s):  
Alkyl Chain ◽  
Liquid Paraffin ◽  
Alkyl Chain Length ◽  
Lubricating Oil ◽  
Oil Additives ◽  
Borate Esters ◽  
Lubricating Oil Additives ◽  
Steel Balls ◽  
Chain Lengths ◽  
Antiwear Ability

Three kinds of S- and P-free borate esters containing N with different alkyl chain lengths were prepared by using boric acid, ethanolamine, and alkyl-alcohol as the starting materials. The chemical structure of the products was analyzed by means of Fourier transformation infrared spectrometry, elemental analysis, and so on. The thermal stability of the products was evaluated by thermogravimetric analysis. The tribological properties of the synthesized borate esters as lubricating oil additives in liquid paraffin were evaluated using a four-ball friction and wear tester while the morphologies of the worn scars of the steel balls were observed using a scanning electron microscope. The chemical components on the worn surfaces of the steel balls were analyzed using an X-ray photoelectron spectroscopy. Results show that all the three kinds of synthetic borate esters as additives in liquid paraffin possess good antiwear performance and may be used as promising S- and P-free environmentally acceptable lubricating oil additives. Particularly, borate ester with short alkyl chain length at a low concentration in liquid paraffin was more effective in reducing wear, and the antiwear ability of the additives decreased with increasing alkyl chain length. The antiwear ability of the N-containing borate esters as additives in liquid paraffin might be closely related to the formation of hydrogen bonds via N with a high electronegativity and small atomic radius and the easy permeation of electron-deficient B on the rubbing steel surfaces.

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