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Tribology of ethylene-air diffusion flame soot under dry and lubricated contact conditions

Bhowmick, Hiralal and Biswas, SK (2011) Tribology of ethylene-air diffusion flame soot under dry and lubricated contact conditions. In: Journal of Physics D: Applied Physics, 44 (48).

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Official URL: http://iopscience.iop.org/0022-3727/44/48/485401/


Soot particles are generated in a flame caused by burning ethylene gas. The particles are collected thermophoretically at different locations of the flame. The particles are used to lubricate a steel/steel ball on flat reciprocating sliding contact, as a dry solid lubricant and also as suspended in hexadecane. Reciprocating contact is shown to establish a protective and low friction tribo-film. The friction correlates with the level of graphitic order of the soot, which is highest in the soot extracted from the mid-flame region and is low in the soot extracted from the flame root and flame tip regions. Micro-Raman spectroscopy of the tribo-film shows that the a priori graphitic order, the molecular carbon content of the soot and the graphitization of the film as brought about by tribology distinguish between the frictions of soot extracted from different regions of the flame, and differentiate the friction associated with dry tribology from that recorded under lubricated tribology.

Item Type: Journal Article
Publication: Journal of Physics D: Applied Physics
Publisher: IOP Publishing ltd
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 03 Jan 2012 11:56
Last Modified: 03 Jan 2012 11:56
URI: http://eprints.iisc.ac.in/id/eprint/42841

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