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Raman Spectra of Fluids in Elastohydrodynamic Contacts

Published online by Cambridge University Press:  21 February 2011

D.J. Gardiner ,
E. Baird ,
A.C. Gorvin ,
W.E. Marshall  and
M.P. Dare-Edwards
D.J. Gardiner
Affiliation:
Newcastle Upon Tyne Polytechnic, Ellison Place, Newcastle upon Tyne, U.K., NE1 8ST
E. Baird
Affiliation:
Newcastle Upon Tyne Polytechnic, Ellison Place, Newcastle upon Tyne, U.K., NE1 8ST
A.C. Gorvin
Affiliation:
Newcastle Upon Tyne Polytechnic, Ellison Place, Newcastle upon Tyne, U.K., NE1 8ST
W.E. Marshall
Affiliation:
Newcastle Upon Tyne Polytechnic, Ellison Place, Newcastle upon Tyne, U.K., NE1 8ST
M.P. Dare-Edwards
Affiliation:
Shell Research Ltd., Thornton Research Centre, P.O. Box 1, Chester, U.K., CH1 3SH.
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Abstract

Initial results of a novel Raman spectroscopic method for studying fluid lubricant characteristics in a simulated elastohydrodynamic contact are reported. The method uses a Raman microscope which allows spectra to be obtained from a small volume (∼ 0.1 nl) of lubricant entrapped in the elastic deformation formed when a loaded glass plate falls onto a lubricated steel ball. The work described here was undertaken to obtain direct pressure measurements from an entrapped fluid at equilibrium after the initial impact. Our results indicate that pressures in twofold excess of the maximum Hertzian pressure can be generated in ball-plate entrapments of the polyphenyl ether 5P4E. In addition 5P4E has been studied as a pure liquid and as a solution in CCl4 using a diamond anvil cell (DAC). Preliminary results on 2,4-dicyclohexyl-2-methylpentane studied using a DAC and a hydrostatic equilibrium cell are also described.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 22: Symposium NY – High Pressure in Science and Technology , 1983 , 151
Copyright
Copyright © Materials Research Society 1984

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References

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