Study of the Role of Cu-Al Intermetallics on the Adhesion of Plasma-Sprayed Copper on Aluminum using Laser Shock Adhesion Testing (LASAT)

The adhesion of copper on aluminum depends on the presence of intermetallic phases. Such phases can form during spraying at the interface between the layer and substrate. This paper deals with the formation mechanism of the intermetallic phases and their influence on adhesion. The type, size, and distribution of the intermetallic phases are investigated as a function of spray parameters and bonding strength is determined by laser shock adhesion testing. Paper includes a German-language abstract.