Effects of Surface Coating Preparation and Sliding Modes on Titanium Oxide Coated Titanium Alloy for Aerospace Applications

Figure 5

Optical micrographs of the four coating surfaces (a) S1 at 20 μm thickness, (b) S1 at 30 μm thickness, (c) S2 at 20 μm thickness, and (d) S2 at 30 μm thickness.

(a)

(b)

(c)

(d)