Tribological Properties of Muscovite, CeO2 and Their Composite Particles as Lubricant Additives

Du, Peng; Chen, Guoxu; Song, Shiyuan; Chen, Hanlin; Li, Jin; Shao, Yingjuan

doi:10.1007/s11249-016-0676-9

Cited by 35 publications

(18 citation statements)

References 28 publications

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“…Thus, low shear strength would form between the ball and the film and lead to a low‐friction coefficient, as shown in SEM images of wear scars. In addition, CeO 2 could act as a catalyst to accelerate physicochemical reactions, and then it would cause the enrichment of C and O elements to the friction surface . Therefore, it can be inferred that CeO 2 in the (Cr,Ce)/a‐C:H film could facilitate the formation of the graphitic transferred layer and enhance the tribological ability of carbon‐based film in ambient air condition.…”

Section: Resultsmentioning

confidence: 99%

Exploiting carbon-based (Cr,Ce)/a-C:H nanocomposite film on cemented WC

Zhou

Liu

Wang

2017

Surf Interface Anal

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Cemented tungsten carbide (WC) has widely served in modern industry because of its outstanding characteristics, while it could suffer from severely wear both under ambient air and water environments. To exploit a novel carbon-based film should be a feasible way to modify the surface of cemented WC and overcome these shortcomings. In the present study, the Cr/Ce co-incorporated (Cr,Ce)/a-C:H carbon-based film was successfully deposited on cemented WC. The microstructure and mechanical properties of films were systematically characterized, and their tribological behaviors were tested in ambient air and deionized water environment. The results showed that (Cr,Ce)/a-C:H film dominated by the typical amorphous structure and the doping Cr existed with the metallic Cr nanocrystallites as well as Ce formed CeO 2 . The (Cr,Ce)/a-C:H film could possess good mechanical performances, which could own higher hardness, elastic module, low internal stress, and better adhesive strength. Especially, the as-prepared (Cr,Ce)/a-C:H film could present relatively lower friction coefficient and wear rate compared to uncoated cemented WC both under ambient air and deionized water environment, indicating that the Cr/Ce co-doped (Cr,Ce)/a-C:H film could be an effective method to modify the surface of cemented WC so as to improve the friction and wear performances of cemented WC materials.

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Section: Resultsmentioning

confidence: 99%

Exploiting carbon-based (Cr,Ce)/a-C:H nanocomposite film on cemented WC

Zhou

Liu

Wang

2017

Surf Interface Anal

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“…The crude BSF oil was refined by alkaline refining and decolorization. The procedures followed refining methods for soybean, camellia seed, and chufa oils after modification (Du et al, 2016; Lee et al, 2013). Typically, 10 g of crude BSF oil was placed in a round‐bottom flask, which was immersed in an oil bath.…”

Section: Methodsmentioning

confidence: 99%

Refining and Sulfurization of Oil from Black Soldier Fly and Its Application as Biodegradable Lubricant Additive

Xiong

Mao

Wang

et al. 2020

J Americ Oil Chem Soc

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Black soldier fly (BSF, Hermetia illucens), a high lipid containing insect, is considered as a promising candidate for bioconversion of restaurant waste in China. The fresh oil extracted from BSF larvae were refined by degumming, alkaline neutralization, and absorption decolorization. The gas chromatography-mass spectrometry analysis showed that 12:0, 16:0, 18:1, and 18:2 were the main fatty acids, which accounted for more than 80% of the refined BSF oil. Odorless sulfurized BSF oil was synthesized, and the tribological behaviors of the sulfurized BSF oil as a biodegradable additive in base oil 150 N and pure poly-alphaolefin PAO4 were evaluated in comparison with the commonly used sulfurized lard by means of four-ball friction and wear testers. The formation of C S bond in the vulcanized oil molecules was confirmed by FTIR analysis. Sulfurized BSF oil showed superior load-carrying capacity and friction-reducing ability compared with sulfurized lard.

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“…It was attributed to the polishing effect of CeO 2 nanoparticles on the surface of friction pairs. The more common phenomenon has been found that CeO 2 nanoparticles show significant anti-wear ability in a large concentration range (0.1-1.0 wt%), without any friction reduction effect, and the bearing capacity increases with the increase of concentration [18][19][20][21]. It is believed that the deposition and tribo-sintering of CeO 2 nanoparticles on worn surfaces forms a compact tribo-film which separates the sliding surfaces and elevates the load carrying and antiwear properties.…”

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

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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.

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Tribological Properties of Muscovite, CeO2 and Their Composite Particles as Lubricant Additives

Cited by 35 publications

References 28 publications

Exploiting carbon-based (Cr,Ce)/a-C:H nanocomposite film on cemented WC

Exploiting carbon-based (Cr,Ce)/a-C:H nanocomposite film on cemented WC

Refining and Sulfurization of Oil from Black Soldier Fly and Its Application as Biodegradable Lubricant Additive

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

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