Tribological compatibility analysis of conventional lubricant additives with palm trimethylolpropane ester (TMP) and tetrahedral amorphous diamond-like carbon coating (ta-C)
Document Type
Article
Publication Date
1-1-2018
Abstract
Modern industrial applications involve rigorous operating conditions due to which lubricant either slips out of the contact or its thin layer resides between the interacting surfaces. Deposition of diamond-like carbon coatings and using lubricants capable of physically adsorbing on the interacting surfaces can significantly improve tribological performance. In this study, tribological compatibility of glycerol mono-oleate, molybdenum dithiocarbamate and zinc dialkyldithiophosphate with palm trimethylolpropane ester and tetrahedral amorphous diamond-like carbon coating has been investigated using universal wear testing machine. For comparison, additive-free and formulated versions of polyalphaolefin were used. Moreover, spectroscopic techniques were used to investigate mechanisms responsible for a particular tribological behavior. Among base oils, trimethylolpropane ester proved to be more effective in enhancing friction performance and mitigating wear of contacts when one of the interacting surfaces was ferrous-based. Self-mated tetrahedral amorphous diamond-like carbon coating surfaces resulted in lowest values of friction and wear coefficient of balls.
Keywords
Antiwear additives, bio-lubricants, DLC coating, friction modifiers, tribology
Divisions
fac_eng
Funders
University of Malaya and Malaysian Ministry of Higher Education (MOHE): High Impact Research Chancellory grant project titled ‘‘Development of Alternative and Renewable Energy Carrier’’ (grant number: UM.C/HIR/MOHE/ENG/60,postgraduate research grant number: PG-200-2016 A,King Saud University (KSU), Saudi Arabia: International Scientific Partnership Program (ref no. ISPP#0092)
Publication Title
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
Volume
232
Issue
8
Publisher
SAGE Publications (UK and US)