Boundary and Extreme Pressure Lubrication

Stachowiak, Gwidon; Batchelor, Andrew W.

doi:10.1016/b978-075067836-0/50009-2

Cited by 11 publications

(24 citation statements)

References 121 publications

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“…As mentioned earlier, this enhanced friction performance of TMP can be attributed to its polar structure due to which its molecules attached on the metallic surfaces such as steel and facilitates sliding of the interacting surfaces whereas PAO is not capable of doing so because of its neutral chemical structure. 23 Additives were able to further enhance the friction characteristics of ta-C/steel contacts irrespective of their type and base oil used (Figure 3). GMO-containing lubricants were proved to be most effective in reducing the frictional force and offered lowest value of friction coefficients when mixed with PAO and TMP separately.…”

Section: Resultsmentioning

confidence: 99%

“…27 Polar molecules of TMP such as carboxyl group of fatty acids formed a monomolecular layer and attached on the chemically reactive steel surfaces as a result of physisorption. 23 This thin layer of lubricant separated the contacting surfaces and prevented metal-to-metal contact. 28 TMP base oil resulted in higher values of wear coefficients compared to additive-free PAO irrespective of contact type.…”

Section: Tribological Resultsmentioning

confidence: 99%

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Tribological compatibility analysis of conventional lubricant additives with palm trimethylolpropane ester (TMP) and tetrahedral amorphous diamond-like carbon coating (ta-C)

Zahid

Mufti

Gulzar

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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Modern industrial applications involve rigorous operating conditions due to which lubricant either slips out of the contact or its thin layer resides between the interacting surfaces. Deposition of diamond-like carbon coatings and using lubricants capable of physically adsorbing on the interacting surfaces can significantly improve tribological performance. In this study, tribological compatibility of glycerol mono-oleate, molybdenum dithiocarbamate and zinc dialkyldithiophosphate with palm trimethylolpropane ester and tetrahedral amorphous diamond-like carbon coating has been investigated using universal wear testing machine. For comparison, additive-free and formulated versions of polyalphaolefin were used. Moreover, spectroscopic techniques were used to investigate mechanisms responsible for a particular tribological behavior. Among base oils, trimethylolpropane ester proved to be more effective in enhancing friction performance and mitigating wear of contacts when one of the interacting surfaces was ferrous-based. Self-mated tetrahedral amorphous diamond-like carbon coating surfaces resulted in lowest values of friction and wear coefficient of balls.

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Section: Resultsmentioning

confidence: 99%

Section: Tribological Resultsmentioning

confidence: 99%

Tribological compatibility analysis of conventional lubricant additives with palm trimethylolpropane ester (TMP) and tetrahedral amorphous diamond-like carbon coating (ta-C)

Zahid

Mufti

Gulzar

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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show abstract

“…The polar molecules, such as the carboxyl group of the fatty acids, of TMP form a monomolecular layer and attach to the chemically reactive steel surfaces as a result of physisorption. 43 This thin layer of lubricant separates the contacting surfaces and prevents metal-to-metal contact. Due to the non-polar structure of PAO, this behaviour was not observed in the case of PAO.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the tribochemical interactions of a tungsten-doped diamond-like carbon coating (W-DLC) with formulated palm trimethylolpropane ester (TMP) and polyalphaolefin (PAO)

et al. 2017

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“…Wear rate was estimated from the diameter of the wear scars generated on the surface of the WC ball and the track area in the steel disks. Lost volume for every sample and their counterpart can be calculated using the following equation [14,15]:…”

Section: Estimate Of Wear Ratementioning

confidence: 99%

Surface Laser Quenching as an Alternative Method for Conventional Quenching and Tempering Treatment of 1538 MV Steel

Carrera-Espinoza

Valerio

Villasana

et al. 2020

Advances in Materials Science and Engineering

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This paper aims at encouraging the use of laser treatment as an environmentally friendly technique to improve the mechanical properties of metallic materials over conventional quenching and tempering techniques through the study of the tribological behavior of AISI 1538 MV steel subjected to surface laser quenching treatment. Sliding wear tests were carried out by the pin-on-disk method. In order to identify the wear mechanisms, the worn surfaces on the disks were evaluated by scanning electron microscopy and the wear scars on the ball were observed by optical microscopy. Results reveal that laser treatment reduces the average friction coefficient by 25% and the wear rate by 60% compared with those achieved by the conventional methods, while the depths of the wear track and hardness of the cross section and surface are maintained.

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Boundary and Extreme Pressure Lubrication

Cited by 11 publications

References 121 publications

Tribological compatibility analysis of conventional lubricant additives with palm trimethylolpropane ester (TMP) and tetrahedral amorphous diamond-like carbon coating (ta-C)

Tribological compatibility analysis of conventional lubricant additives with palm trimethylolpropane ester (TMP) and tetrahedral amorphous diamond-like carbon coating (ta-C)

Investigation of the tribochemical interactions of a tungsten-doped diamond-like carbon coating (W-DLC) with formulated palm trimethylolpropane ester (TMP) and polyalphaolefin (PAO)

Surface Laser Quenching as an Alternative Method for Conventional Quenching and Tempering Treatment of 1538 MV Steel

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