Self-Lubricating Polytetrafluoroethylene/Polyimide Blends Reinforced with Zinc Oxide Nanoparticles

Figure 6

Optical micrographs of transfer films (×200, 100 N, 1.4 m/s). (a) PTFE/PI, (b) 3 wt% ZnO/PTFE/PI, and (c) 12 wt% ZnO/PTFE/PI. Arrow indicates the sliding direction.

(a)

(b)

(c)