Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

Coatings

Heoy Geok How¹  Yeoh Jun Jie Jason¹  Hun Guan Chuah¹  Farooq Sher²  Jun Sheng Teh³  Yew Heng Teoh³ 

[1] Department of Engineering, School of Engineering, Computing and Built Environment, UOW Malaysia KDU, Penang University College, 32 Jalan Anson, Georgetown 10400, Penang, Malaysia;Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham NG11 8NS, UK;School of Mechanical Engineering, Universiti Sains Malaysia, Nibong Tebal 14300, Penang, Malaysia;

关键词: sustainable fuels;    graphene nanoplatelets;    Pongamia oil;    tribology;    friction and wear;   

DOI  :  10.3390/coatings11060732

来源: DOAJ

【 摘 要 】

This study investigated the tribological behaviour of Pongamia oil (PO) and 15W–40 mineral engine oil (MO) with and without the addition of graphene nanoplatelets (GNPs). The friction and wear characteristics were evaluated in four-ball anti-wear tests according to the ASTM D4172 standard. The morphology of worn surfaces and the lubrication mechanism of GNPs were investigated via SEM and EDS. This study also focuses on the tribological effect of GNP concentration at various concentrations. The addition of 0.05 wt % GNPs in PO and MO exhibits the lowest friction and wear with 17.5% and 12.24% friction reduction, respectively, and 11.96% and 5.14% wear reduction, respectively. Through SEM and EDS surface analysis, the surface enhancement on the worn surface by the polishing effect of GNPs was confirmed. The deposition of GNPs on the friction surface and the formation of a protective film prevent the interacting surfaces from rubbing, resulting in friction and wear reduction.

【 授权许可】

Unknown