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

Figure 10

Effect of sliding velocity on worn surfaces of the investigated PTFE: (a) scratches and small discontinuities, (b) plastic deformation, (c) localised worn surface areas, (d) localised worn surface areas and numerous pores, (e) marks of fatigue wear, and (f) localised worn surface areas and numerous pores, SEM.

(a)

(b)

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(d)

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(f)