Effect of Size of Multiwalled Carbon Nanotubes Dispersed in Gear Oils for Improvement of Tribological Properties

Figure 2

HRSEM images of 10-hour and 20-hour ball-milled MWCNTs. (a) 10-Hour ball-milled MWCNTs, (b) 20-hour ball-milled MWCNTs.

(a)

(b)