Tribological properties of Fe7Mo6-based alloy under two ionic liquid lubrications

Murakami, Takashi; Kaneda, K.; Nakano, Miki; Korenaga, Atsushi; Mano, Hiroki; Sasaki, Shinya

doi:10.1016/j.triboint.2008.02.017

Cited by 16 publications

(8 citation statements)

References 27 publications

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“…Despite their good tribological behaviour, the hydrolysis products of those anions are highly corrosive [36]. This fact provoked the introduction of new and more stable ILs based on [FAP] and [NTf 2 ] anions [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53], which present enhanced tribological properties due to the formation of fluoride tribofilms, especially at high loads [54]. Recently, phosphonium cation-based ILs have been introduced in this field because of their growing commercial availability and good tribological performance [26,[55][56][57][58][59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Isoconversional kinetic analysis applied to five phosphonium cation-based ionic liquids

et al. 2017

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Thermal degradation of five phosphonium cation-based ionic liquids ([P 66614 outperforming the other ones in both pyrolytic and oxidising conditions. Although the thermal degradation mechanism is affected by atmospheric conditions, the degradation trend remains practically constant. As the dynamic methodology usually overestimates the long-term thermal stability, an isoconversional methodology is better for predicting the long-term thermal stability of these ionic liquids in order to be used as base oil or additive in lubricants formulation. Finally, the model-free methodology can predict at lower costs the ILs performance in isothermal conditions. Highlights• Weakly coordinating anions provoke good thermal stability of ILs.• • Isoconversional methods are better than dynamic ones for long-term thermal studies.• Activation energy behavior at low conversions is related to a single reaction.• Model-free methodology can predict the ILs performance in isothermal conditions.

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Section: Introductionmentioning

confidence: 99%

Isoconversional kinetic analysis applied to five phosphonium cation-based ionic liquids

et al. 2017

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“…Click he e d l ad Re i ed ma c i -clea e i Ma c i _Clea .d c Click here to ie linked References in the presence of water [18][19][20]. This drawback led to the incorporation of new and more stable fluorine containing anions like [FAP] [21][22][23][24][25][26][27][28][29][30] and [NTf2] [31][32][33][34][35][36][37][38][39][40]. The excellent lubricating performance of these anions is directly related to their reactivity [13,23,26], inducing the formation of protective adsorbed tribofilms on metal surfaces, especially at high load conditions [6], and contributing to friction and wear reduction.…”

Section: Introductionmentioning

confidence: 99%

Antifriction and Antiwear Properties of an Ionic Liquid with Fluorine-Containing Anion Used as Lubricant Additive

et al. 2017

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Tribological behavior of trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl) imide [P66614][NTf2] ionic liquid (IL) used as additive in a diester oil at concentrations of 0.25, 0.5 and 1 wt% was studied in this research. The IL solubility in the base oil was measured using the inductively coupled plasma mass spectrometry (ICP-MS) technique and corrosion analysis was done at room temperature at relative humidity of 49 77%. Tribological tests were conducted for 30 minutes at room temperature, 15 Hzfrequency, 4 mm of stroke length, a load of 80 N (corresponding to 2 GPa of maximum contact pressure) and relative humidity of 35-53%. Friction coefficient was recorded during tests and the wear scar was measured by confocal microscopy. Worn surface was also analyzed by SEM, EDS and XPS. Results showed that a saturated solution of [P66614][NTf2] in the base oil contains about 30 wt% of IL and corrosion activity for the highest concentration of IL (1 wt%) was not found after a 20-day test. Although the base oil and the mixtures had similar friction behavior, 1 wt% sample exhibited slightly lower wear volume than the base oil. Regarding surface analysis, SEM images exhibited similar wear track width (707-796 µm) and wear mechanism (adhesive) for all samples tested. In addition, the EDS spectra only showed the elements present in the steel. Finally, XPS study could not detect differences regarding iron chemical state. This mentioned similitude among the samples is consistent with the tribological behavior obtained.

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“…Recently, ionic liquids (ILs) as lubricants have been widely studied because of their favorable physical and lubricating properties such as negligible volatility, nonflammability, high thermal stability, low melting point, excellent friction reducing, and anti-wear characteristics [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. As a kind of novel versatile lubricants, they might be superior to conventional lubricants under some harsh conditions involving extremely high or low temperature and extremely high pressure where the excellent properties of the liquid lubricants are first of all stressed.…”

Section: Introductionmentioning

confidence: 99%

The Influences of Methyl Group at C2 Position in Imidazolium Ring on Tribological Properties

et al. 2009

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Tribological properties of two kinds of imidazolium ionic liquids (ILs) of 1,2-dimethyl-3-hexylimidazolium bis(trifluoromethylsulfonyl)imide (L-F116) and 1-dimethyl-3-hexylimidazolium bis(trifluoromethylsulfonyl)imide (L-F106) were evaluated as lubricant additives in poly(ethylene glycol) (PEG) for the steel-steel sliding pair by using an Optimol-SRV oscillating friction and wear test at the room temperature. At the same time, their electrochemical corrosion behaviors were measured by Tafel polarization. The morphologies of the worn surfaces were observed using a scanning electron microscope (SEM). The chemical states of several typical elements on the worn surfaces were examined by means of X-ray photoelectron spectroscopy (XPS). The results show that corrosion phenomena of PEG containing ILs on pure copper are negligible compared to PEG at room temperature. The 2-substituted imidazolium IL L-F116 shows excellent tribological performance and is superior to L-F106 in terms of anti-wear performance and load-carrying capacity. The worn surfaces were characterized to have slight abrasion and the XPS results indicated the formation of tribochemical adsorption and chemical reaction films on the worn surfaces.

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Tribological properties of Fe7Mo6-based alloy under two ionic liquid lubrications

Cited by 16 publications

References 27 publications

Isoconversional kinetic analysis applied to five phosphonium cation-based ionic liquids

Isoconversional kinetic analysis applied to five phosphonium cation-based ionic liquids

Antifriction and Antiwear Properties of an Ionic Liquid with Fluorine-Containing Anion Used as Lubricant Additive

The Influences of Methyl Group at C2 Position in Imidazolium Ring on Tribological Properties

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