Friction and Wear Response of Friction Stir Processed Cu/ZrO₂ Surface Nano-Composite

Figure 6

Optical micrograph at various locations within SZ of the composite (a) towards advancing side at the top, (b) towards retreating side on the top, (c) at the centre towards advancing side, (d) at the centre towards retreating side, and (e) towards advancing side at the bottom (f) interface.

(a)

(b)

(c)

(d)

(e)

(f)