Lubricated sliding wear mechanism of chromium-doped graphite-like carbon coating

MANDAL, Paranjayee, EHIASARIAN, Arutiun and HOVSEPIAN, Papken (2014). Lubricated sliding wear mechanism of chromium-doped graphite-like carbon coating. Tribology International, 77, 186-195.

[img]
Preview
PDF
Ehiasarian_Lubricated_sliding_wear_mechanism_of_Chromium.pdf - Accepted Version

Download (1MB) | Preview
Link to published version:: 10.1016/j.triboint.2014.04.007

Abstract

The current research aims to discuss the tribological behaviour of Chromium-doped graphite-like carbon coatings and suggest a wear mechanism under both dry (in air) and boundary lubricated sliding condition based on phase composition of the wear product generated in wear track during pin-on-disc experiments. As expected, the friction coefficient reduces from 0.22 to 0.12 due to addition of lubricant. Raman analysis indicates that wear mechanism is oxidative in dry sliding condition whereas it is chemically reactive in the presence of lubricant. It is speculated that the key-factor of reduced friction and wear coefficient in lubricated condition is the formation of CrCl3 due to tribochemical reaction between coating and oil. CrCl3 has graphite-like layered structure; therefore it acts like solid lubricant.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Thin Films Research Centre > Nanotechnology Centre for PVD Research
Identification Number: 10.1016/j.triboint.2014.04.007
Depositing User: Ann Betterton
Date Deposited: 10 Dec 2014 16:34
Last Modified: 19 Oct 2016 23:50
URI: http://shura.shu.ac.uk/id/eprint/9007

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics