Title: Tribological investigation of molybdenum disulphide nanoparticles and graphene nanoflakes as lubricant additives in Karanja oil

Authors: Zahid Mushtaq; M. Hanief

Addresses: Department of Mechanical Engineering, National Institute of Technology, Srinagar, 190006, Jammu and Kashmir, India ' Department of Mechanical Engineering, National Institute of Technology, Srinagar, 190006, Jammu and Kashmir, India

Abstract: This study was directed at improving the lubricating potentials of Karanja oil (KO). KO was additivated with nano-sized MoS₂ and graphene in assorted form and the experimentation was executed on a four-ball tester according to ASTM D-4172 standards. The results proved that their addition eminently brought down the wear of the test balls. Minimum wear scar diameter was recorded at 0.5% additivation which was cut down by 27.33% as compared to the virgin KO. The variation of the coefficient of friction (cof) and wear with load and speed was studied on a ball-on-disc tribometer for two different tribo-pairs. The surface characteristics of the wear scars were revealed under FESEM, optical microscope, and 3D surface profilometer. The cof and wear rate was reduced with both load and speed. This was attributed to the formation of tribo-layer on the scar surfaces as characterised by Raman analysis.

Keywords: Karanja; graphene; friction; wear; biolubricant; nano-lubricant; nano-additives.

DOI: 10.1504/IJSURFSE.2022.124011

International Journal of Surface Science and Engineering, 2022 Vol.16 No.2, pp.124 - 149

Received: 09 Sep 2021
Accepted: 24 Oct 2021
Published online: 08 Jul 2022 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article