Tribological properties and tribochemical analysis of nano-cerium oxide and sulfurized isobutene in titanium complex grease

Tiejun, Shen; Wang, Daxi; Yun, Jimmy; Qinglian, Liu; Liu, Xinghua; Peng, Zhongxiao

doi:10.1016/j.triboint.2015.09.028

Cited by 47 publications

(24 citation statements)

References 28 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is an increasing trend to analyse and classify the new materials' anti-friction resistance by their altered morphology. However, many studies 11,12 only provided a qualitative description, but lacked quantitative evaluation. Rutherford and Hutchings 13 proposed a method to calculate the wear rate for small-scale abrasive wear based on the depth of the crack.…”

Section: Introductionmentioning

confidence: 99%

A novel wear angle determination algorithm for wear image based on direction correlation of wear scar

Xiao

Zhang

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

A lubricant is a substance that lessens friction and wear between mechanical parts. A good quality lubricating oil is required for protecting the mechanical equipment and reducing energy consumption. Its performance index (friction coefficient) could be measured by the four-ball wear test. For the morphological analysis of testing data from the four-ball wear test, determination of wear angle is very important for measuring the wear spot diameter, validity of the four-ball wear test and recognition of abnormal wear scar. On the basis of character analysis and image processing technology, a novel wear angle determination algorithm for wear scar is presented in this article. The direction of the wear scar (wear angle) is determined based on angle transformation and grey consistency (the smallest change of grey level). Simulation results show that the algorithm has high precision, good robustness and less time consuming. The average absolute error of our method is 0.8° and the absolute error of 95% of samples is <4°. The average runtime per frame is 3.896 s in the simulation platform.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel wear angle determination algorithm for wear image based on direction correlation of wear scar

Xiao

Zhang

Wang

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…Daxi Wang et al reported that CeO 2 nanoparticles added to the titanium complex grease produced the best anti-wear characteristics at a concentration of 2.0 wt%. It was proved that CeO 2 nanoparticles can catalyze the oxidation of metallic Fe to form ferrite oxide-containing tribo-film [22]. The tribo-film composed of cerium oxide and iron oxide not only has high bearing capacity but also has strong binding force with the substrate, which results in higher anti-wear ability of the system.…”

Section: Introductionmentioning

confidence: 99%

The Tribological Mechanism of Cerium Oxide Nanoparticles as Lubricant Additive of Poly-Alpha Olefin

Lei

Zhang

et al. 2020

Tribol Lett

View full text Add to dashboard Cite

Oleylamine (hereinafter referred to as OM)-modified CeO 2 nanoparticles were synthesized by a one-pot pyrolysis method. The tribological properties of the as-prepared CeO 2 nanoparticles as the lubricant additive in poly-alpha olefin (PAO) were investigated with a four-ball machine, and their lubricating mechanism was discussed in relation to worn surface analyses by SEM, EDS, and XPS. Findings indicate that these nanoparticles exhibit good dispersibility as well as excellent anti-wear ability in PAO. This is because OM-modified CeO 2 nanoparticles can catalyze the oxidation of metallic Fe to form ferrite oxide-containing tribo-film. Under the condition of ASTM D2266-2001, the same lowest WDS was obtained at the concentration of 0.2 wt% and 1.8 wt%. When the concentration of CeO 2 is 0.2 wt%, a compact catalytic oxidation tribo-film is formed, which has more outstanding long-term anti-wear ability. When 1.8 wt% CeO 2 is added, the tribo-film formed is the combination of catalytic oxidation film and ceria deposition film, which has more significant bearing capacity.

show abstract

“…These include TiO 2 /CuO nanoparticles, 9 nano-diamond, 10 nano-copper, 11 nano-ZrO 2 , 12 ZnO nanoparticles, 13 TiO 2 nanoparticles, 14 triangular copper nanoplates, 15 silica nanoparticles, 16 nanometre TiO 2, 17 nanometre SiO 2 17 and nano-cerium oxide. 18,19 In addition, nanoparticles are a green additive in some applications. 20 As typical two-dimensional nanomaterial, graphene has both layered and nano characteristics, 21 it exhibits good anti-friction properties.…”

Section: Introductionmentioning

confidence: 99%

“…Nanoparticles have also been widely studied for use as lubricating grease additives due to their unique physical and chemical properties. These include TiO 2 /CuO nanoparticles, 9 nano‐diamond, 10 nano‐copper, 11 nano‐ZrO 2 , 12 ZnO nanoparticles, 13 TiO 2 nanoparticles, 14 triangular copper nanoplates, 15 silica nanoparticles, 16 nanometre TiO 2, 17 nanometre SiO 2 17 and nano‐cerium oxide 18,19 . In addition, nanoparticles are a green additive in some applications 20 .…”

Section: Introductionmentioning

confidence: 99%

Effect of few layer graphene additive on the tribological properties of lithium grease

et al. 2020

Lubrication Science

View full text Add to dashboard Cite

The tribological properties of lithium grease with few layer graphene (FLG) additive were studied. Three-dimensional surface topography, FESEM with EDS and XPS were used to analyse the morphology, distribution of elements and chemical states on the wear spots. The results show that 0.1 wt% FLG content produced maximum reduction rate of the friction coefficient and minimum wear spot diameter (WSD). And the best results obtained under larger load and lower speed. Fe 3 O 4 was found to be the main component of the chemical reaction film formed on the friction surface when pure lithium grease lubrication was applied. However, when FLG-containing lubricating grease was used instead, the boundary film was mainly composed of Fe 2 O 3 and adsorbed FLG. The effectiveness of FLG in reducing the friction coefficient and WSD of lithium grease is mainly attributed to its large specific surface area, great number of active groups and typical layered structure.

show abstract

Tribological properties and tribochemical analysis of nano-cerium oxide and sulfurized isobutene in titanium complex grease

Cited by 47 publications

References 28 publications

A novel wear angle determination algorithm for wear image based on direction correlation of wear scar

A novel wear angle determination algorithm for wear image based on direction correlation of wear scar

The Tribological Mechanism of Cerium Oxide Nanoparticles as Lubricant Additive of Poly-Alpha Olefin

Effect of few layer graphene additive on the tribological properties of lithium grease

Contact Info

Product

Resources

About