Beobachtungen von Diffusionsprozessen im Schichtensystem Silber-Zinksulfid mit dem Photoemissions-Elektronenmikroskop

By means of the photoemission electron microscope Balzers Metioscope KE 3 the diffusion processes were investigated which occur at elevated temperatures in a system of silver and zincsulfide coatings. At 150 °C the formation of Ag₂S at the surface of the silver film can be seen (high emitting round spots on bright background) and at 240 °C one can observe the diffusion of silver through the zincsulfide film (high emitting small spots on dark background). On heating coagulation process of the silver particles takes place in the boundary zone near the silver layer. With increasing temperatures the mobility of these particles becames high enough to allow them to migrate into the silver layer.