Figure 6

Friction coefficient and WSD versus concentration of (a) Sc-Ag/GN and (b) ZDDP dispersed in 10w40 oil (343 N, 1200 rpm, 60 mins, 75 ± 1 °C).

Friction coefficient and WSD versus concentration of (a) Sc-Ag/GN and (b) ZDDP dispersed in 10w40 oil (343 N, 1200 rpm, 60 mins, 75 ± 1 °C).