Tribological Properties of ZrO2 Coating on the Ball Joint of an Axial Piston Pump in High Water-Based Emulsion Medium

Figure 9

Wear condition of two kinds of materials under different frequencies. (a) 2D morphology of wear marks and 3D morphology of wear marks of steel-steel pairs at different frequencies. (b) Wear scar depth curves of ceramic-ceramic pair at different frequencies.

(a)

(b)