1986
DOI: 10.1080/05698198608981704
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An Adsorption Model for Friction in Boundary Lubrication

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Cited by 126 publications
(127 citation statements)
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“…This tends to create a lower shear strength film, thus reducing shear. This is inline with the observation of Jahanmir and Beltzer [37]. However, it is clear in figures 9 (c) and (d) that after a minimum shear stress level is achieved, any further accumulation of adsorbed molecules increases the shear stress.…”
supporting
confidence: 52%
See 1 more Smart Citation
“…This tends to create a lower shear strength film, thus reducing shear. This is inline with the observation of Jahanmir and Beltzer [37]. However, it is clear in figures 9 (c) and (d) that after a minimum shear stress level is achieved, any further accumulation of adsorbed molecules increases the shear stress.…”
supporting
confidence: 52%
“…Jahanmir and Beltzer [37] provide an empirical model for the boundary friction coefficient using a two-component lubricant. They used Temkin as a base isothermal adsorption model [38] and assumed that friction arises only due to direct surface interaction.…”
Section: Solvation Pressurementioning
confidence: 99%
“…Based on all these observations, the classical model of OFM behaviour was developed -that these additives adsorb on polar surfaces to form close-packed, vertically-oriented monolayers. The weak interaction potentials and very limited interpenetration between methyl end groups of monolayers on opposing, sliding surfaces results in a very low shear strength interface and thus low friction [14]. An important feature of these vertically-oriented monolayers is that Van-der-Waals forces between adjacent long, straight alkyl chains confer considerable strength to the monolayer, such that monolayers of long chain molecules are able to withstand the very large applied pressures present at asperity-asperity contacts [15,16].…”
Section: In the Extreme Case We May Picture Each Of The Metallic Surfmentioning
confidence: 99%
“…Jahanmir and Beltzer compared the friction-reducing properties of copper lubricated by solutions of stearic acid, oleic acid and elaidic acid in refined mineral oil [14]. Elaidic acid is the trans isomer of oleic acid.…”
Section: In the Extreme Case We May Picture Each Of The Metallic Surfmentioning
confidence: 99%
“…Much research has shown that vertically-oriented monolayers of OFMs deposited on surfaces by Langmuir-Blodgett techniques can produce low friction and this is believed to originate from the low shear strength of the interfacial region between the ends of opposing monolayers on the rubbing surfaces [3][4][5]. Some research has also shown that saturated chain OFMs can self-assemble from solution in oil onto solid surfaces to form full or partial, nearly vertically-oriented monolayers and that this results in low friction [6][7][8][9]. However there is also research to suggest that some films formed on and between surfaces by OFMs can be much thicker than a single pair of monolayers [10] [11].…”
Section: Introductionmentioning
confidence: 99%