Figure 7From: Tribological Behaviors of Electroless Nickel-Boron Coating on Titanium Alloy SurfaceSEM images of the wear track in (a) TC4 titanium alloy substrate, (b) as-plated coating, (c) air-treated coating, and (d) nitrogen-treated coating (The images on the right line are enlarged SEM images within the white box of images on the left line)Back to article page