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Molecular scale liquid lubricating films

Molecular scale liquid lubricating films
Molecular scale liquid lubricating films
A number of recently-developed experimental techniques, such as force balance, atomic force microscopy and ultrathin film interferometry have enabled the direct study of the properties of very thin liquid lubricating films between solid surfaces. These have been used to demonstrate the structure and rheology, and thus the lubricating ability, of monolayer additive films in rolling and sliding contacts. They have also been used to investigate the thin film properties of simple, additive-free fluids such as hydrocarbon base stocks.

This paper reviews previous work on the thin film-forming properties of simple lubricant base fluids. Newwork is carried out using ultrathin film interferometry and a rolling-sliding friction test apparatus. It is found that the quasi-spherical molecules, cyclohexane and OMCTS form enhanced film thicknesses in high pressure, slow speed, rolling contacts. There is also an indication of a step-wise dependence of film thickness on rolling speed, in accord with finding using atomic force microscopy and surface forces apparatus. Friction measurements in mixed rolling-sliding show that these fluids also reduce friction in the boundary film regime.
0444505318
38
359-370
Elsevier
Spikes, Hugh A.
9958f7db-ad55-4d76-8766-097333676c96
Ratoi, Monica
cfeffe10-31ca-4630-8399-232c4bc2beff
Dowson, D.
Spikes, Hugh A.
9958f7db-ad55-4d76-8766-097333676c96
Ratoi, Monica
cfeffe10-31ca-4630-8399-232c4bc2beff
Dowson, D.

Spikes, Hugh A. and Ratoi, Monica (2000) Molecular scale liquid lubricating films. Dowson, D. (ed.) In Thinning films and tribological interfaces: Proceedings of the 26th Leeds-Lyon Symposium on Tribology. Elsevier. pp. 359-370 . (doi:10.1016/S0167-8922(00)80140-6).

Record type: Conference or Workshop Item (Paper)

Abstract

A number of recently-developed experimental techniques, such as force balance, atomic force microscopy and ultrathin film interferometry have enabled the direct study of the properties of very thin liquid lubricating films between solid surfaces. These have been used to demonstrate the structure and rheology, and thus the lubricating ability, of monolayer additive films in rolling and sliding contacts. They have also been used to investigate the thin film properties of simple, additive-free fluids such as hydrocarbon base stocks.

This paper reviews previous work on the thin film-forming properties of simple lubricant base fluids. Newwork is carried out using ultrathin film interferometry and a rolling-sliding friction test apparatus. It is found that the quasi-spherical molecules, cyclohexane and OMCTS form enhanced film thicknesses in high pressure, slow speed, rolling contacts. There is also an indication of a step-wise dependence of film thickness on rolling speed, in accord with finding using atomic force microscopy and surface forces apparatus. Friction measurements in mixed rolling-sliding show that these fluids also reduce friction in the boundary film regime.

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Published date: 14 September 2000
Organisations: Engineering Science Unit, nCATS Group

Identifiers

Local EPrints ID: 356398
URI: http://eprints.soton.ac.uk/id/eprint/356398
ISBN: 0444505318
PURE UUID: b4351321-16e0-48cb-8976-b044d3f46315
ORCID for Monica Ratoi: ORCID iD orcid.org/0000-0001-8400-3054

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Date deposited: 22 Nov 2013 14:12
Last modified: 15 Mar 2024 03:35

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Contributors

Author: Hugh A. Spikes
Author: Monica Ratoi ORCID iD
Editor: D. Dowson

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