Tribological behaviour of hybrid AMMC sliding against steel and cast iron under MWCNT-Oil lubrication

The work presented here focused the tribological behaviour of aluminium metal matrix hybrid composites (AMMC) sliding against steel (EN31) and cast iron (CI), under particle laden oil lubricated condition. Tribological characteristics are evaluated using a pin-on-disc tribometer with Al6061-SiC-C pins sliding against EN31 and grey CI discs. For the particulate lubrication, multiwalled carbon nanotube (MWCNT) is dispersed in a SN500 grade base oil and a stable nano-lubricant is formed. From the experimental observation it is found that the MWCNT additive significantly enhanced the anti-wear and antifriction capabilities for the both the tribopairs. Further, the fractography and morphological studies of composite pins reveal the formation of tribolayers and mechanically mixed layers and illustrates the underlying friction and wear mechanism.