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.

Ehiasarian_Lubricated_sliding_wear_mechanism_of_Chromium.pdf - Accepted Version

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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 - Does NOT include content added after October 2018: Materials and Engineering Research Institute > Advanced Coatings and Composites Research Centre > Nanotechnology Centre for PVD Research
Identification Number:
Page Range: 186-195
Depositing User: Ann Betterton
Date Deposited: 10 Dec 2014 16:34
Last Modified: 18 Mar 2021 08:07

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