Excellent solid lubrication of electrodeposited nickel-multiwalled carbon nanotube composite films

Nickel-multiwalled carbon nanotube (MWCNT) composite films were fabricated by an electrodeposition technique, and their frictional properties were investigated by ball-on-plate type friction testing using an Al2O3 ball as a counter surface without lubricant. Ni-MWCNT composite films showed superior frictional properties compared to nickel films. The friction coefficient of Ni-MWCNT composite films decreased with increasing MWCNT content. The Ni-0.5 mass% MWCNT composite film showed the minimum friction coefficient value of 0.13.