Figure 4From: Recycled-copper-filled epoxy composites: the effect of mixed particle size SEM of epoxy composites. SEM of epoxy composites with recycled filler content at (a) 0Â vol%, (b) coarse 20Â vol%, (c) coarse 40Â vol%, (d) fine 20Â vol%, (e) fine 40Â vol%, (f) mixed 20Â vol% and (g) mixed 40Â vol%, respectively.Back to article page