Effect of Polypropylene Modification by Impregnation with Oil on Its Wear and Friction Coefficient at Variable Load and Various Friction Rates

Figure 13

Effect of sliding velocity on worn surfaces of the investigated PA 6.6: ((a) and (b)) shallow scratches and wear traces of adhesive nature; (c) scratches and cracks on the surface; (d) smooth zone with dominating adhesion and microcutting; (e) zone with fracture; bridges with plastically deformed pores between them; (f) zone with fracture, SEM.

(a)

(b)

(c)

(d)

(e)

(f)