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

Figure 11

Effect of sliding velocity on worn surfaces of PA 6.6 tested at various sliding velocities: ((a) and (b)) cracks, small parallel scratches, and wear products pressed in the specimen surface, (c) sparse overlaps of the material, (d) zone with scaly structure, formed of “roll-shaped particles,” and (e) magnified “roll-shaped particles,” SEM.

(a)

(b)

(c)

(d)

(e)