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

Figure 7

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

(a)

(b)