Microtribology and Friction-Induced Material Transfer in Layered MoS2 Nanoparticles Sprayed on a Steel Surface

Sahoo, Rashmi R and Biswas, Sanjay K (2010) Microtribology and Friction-Induced Material Transfer in Layered MoS2 Nanoparticles Sprayed on a Steel Surface. In: Tribology Letters, 37 (2). pp. 313-326.

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Abstract

Frictional performance of molybdenum disulfide (MoS2) particles sprayed on a substrate is investigated in a ball-on-disc tribometer. The ability of large (similar to 2 mu m) and small (similar to 50 nm) particles to generate low-friction transfer film is investigated with a view to elucidate the requirement for film formation. Particle migration, particle stability in the contact region, oxidation potential, and particle adhesion to the substrate are explored within a span of operating parametersp; normal load, and sliding velocity. It is found that the larger particles are able to migrate to the contact to raise a homogeneous but nonuniform low-friction transfer film that flows plastically to yield large contact areas, which aid in wear protection. Within the present load and speed range, the inability of small particles to stay in the contact region and undergo basal slip militates against the formation of a low-friction transfer film.

Item Type:	Journal Article
Publication:	Tribology Letters
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Keywords:	MoS2; Nanotribology; Raman spectroscopy; Transfer film; Friction; Solid lubricant
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	24 Feb 2010 04:46
Last Modified:	19 Sep 2010 05:55
URI:	http://eprints.iisc.ac.in/id/eprint/25778

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