Enhancement of structural stability of nanosized amorphous Fe2O3 powders by surface modification

Chen, Y.; Li, X.H.; Wu, P.L.; Li, W.; Zhang, X.Y.

doi:10.1016/j.matlet.2006.07.047

Cited by 16 publications

(7 citation statements)

References 15 publications

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“…Figure 9 shows the curve‐fitted XPS spectra at 50°C. The Fe2p3/2 peaks for the two greases are both attributed to Fe (706.8 eV), Fe 3 C (707.9 eV), FeO (709.1 eV), Fe 2 O 3 (710.3 eV) and FeOOH (711.5 eV), respectively 24–26 . Fe and Fe 3 C are the constituent of steel.…”

Section: Resultsmentioning

confidence: 99%

“…While for the graphene grease, C–C bond is mainly ascribed to the contaminated carbons and the carbon from graphene, 27 indicating the doping of graphene into the tribofilm. The O1s spectrums with five peaks are both corresponding to Fe–O bond (530.3 eV), Al 2 O 3 (531.3 eV), FeOOH (532.2 eV), SiO 2 (532.9 eV) and C–O bond (533.5 eV), respectively 24–26 . The Si2p peaks both corresponds to the SiO 2 (103.1 eV), which is tribochemical reactions product 24,28 .…”

Section: Resultsmentioning

confidence: 99%

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Improving of the tribological properties of attapulgite base grease with graphene

Feng

Yin²

2021

Lubrication Science

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With the rapid development of industry, individuals paid increasing demanding on the friction‐reducing and antiwear properties of lubricants under harsh service conditions. Here, the attapulgite base grease and attapulgite greases with grephene were successfully synthesised. The tribological behaviours of the greases were comparatively investigated using a SRV‐IV tribometer with the ball‐on‐disk configuration. The results show that the attapulgite grease with graphene presents better friction‐reducing and antiwear properties than the attapulgite base grease, especially at high load, frequency and temperature. The friction‐reducing and antiwear mechanism was determined through the analysis of worn surfaces and tribofilms formed on it. The results revealed that a tribofilm composed with Fe, Fe3C, Fe2O3, FeOOH, Al2O3, SiO2, graphene, attapulgite and organic compounds was formed on the worn surface, which is responsible for the excellent tribological properties of the attapulgite grease with graphene. Thus, as‐prepared attapulgite grease with graphene shows great potential in the lubrication for mechanical equipment operated under harsh conditions.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Improving of the tribological properties of attapulgite base grease with graphene

Feng

Yin²

2021

Lubrication Science

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“…As for Mn-0, the Fe 2p3/2 peak can be devided into two sub-peaks with binding energies of 709.35 and 711.4 eV, indicating the co-existence of FeO and Fe 2 O 3 . 25,26 With Mn addition increasing, the ferrous oxide transfers from FeO to Fe 2 O 3 . Moreover, when the addition of Mn is 1 wt%, the Mn 2p3/2 peak with 641 eV indicates that MnO exists on the worn surface of Mn-1.…”

Section: Effect Of Mn On the Tribological Properties Of Iron-based Frmentioning

confidence: 99%

Influence of Mn on the iron-based friction material directly prepared by in situ carbothermic reaction from vanadium-bearing titanomagnetite concentrates

Feng

Zhang

et al. 2018

RSC Adv.

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“…The XPS spectra of Si, Mg and O elements in tribofilms generated from different additives in the base oil are shown in Figure 8. The XPS analysis on the worn surface lubricated by the oil containing different concentrations of serpentine under 150 N for different duration was performed as referenced to that of the base oil (Li et al, 1996;Najman et al, 2004;Chen et al, 2007;Ma et al, 2009aMa et al, , 2009b. The peak fitting spectra of the typical elements such as Mg, Si and O are shown in Figure 8, and some peak positions are shown in Table III.…”

Section: Xps Analysis On the Worn Surfacementioning

confidence: 99%

Tribological behaviours of surface-modified serpentine powder as lubricant additive

Zhang

Yan

et al. 2016

Industrial Lubrication and Tribology

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Purpose – The aim of this paper is to study the tribological performance and self-repairing performance of surface-modified nanoscale serpentine powders as lubricant additives in the mineral base oil (5-CST). Design/methodology/approach – Fourier transform infrared spectroscopy spectra and thermo-gravimetric analysis of both modified and unmodified serpentine were performed to analyse their grafting ratio and suspension after modified using a long-chain naphthene aliphatic acid. The tribological properties of surface-modified serpentine as lubricant additives in 5-CST were evaluated and the worn surfaces were investigated by X-ray photoelectron spectroscopy (XPS) and X-ray absorption near edge structure (XANES). Findings – The results show that the serpentine particles have high grafting ratio, improving the dispersity in 5-CST. When the serpentine concentration of 1.00 weight per cent is used as additives in 5-CST, friction coefficient reduces by 14.80 per cent under 294 N and wear scar diameter (WSD) decreases by 11.82 per cent. The results of X-ray absorption near edge structure and XANES show that the adsorption and tribochemical reactions occur to form self-repairing lubrication films. Originality/value – The paper illustrates a tribofilm form on the rubbed surface, which is responsible for the decrease in friction and wear, mainly containing iron oxides, silicon oxides, magnesium oxides and organic compounds. The results are useful for further applications in advanced environmental friendly lubricating oils and additives.

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Enhancement of structural stability of nanosized amorphous Fe2O3 powders by surface modification

Cited by 16 publications

References 15 publications

Improving of the tribological properties of attapulgite base grease with graphene

Improving of the tribological properties of attapulgite base grease with graphene

Influence of Mn on the iron-based friction material directly prepared by in situ carbothermic reaction from vanadium-bearing titanomagnetite concentrates

Tribological behaviours of surface-modified serpentine powder as lubricant additive

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