Paths of diffusion, between Cu-rich and Ag-rich solid solutions in this system, were studied at 670 and 700C. The experimentally determined concentration profiles were converted into activity profiles. An analogy between solid/solid and solid/vapor/solid diffusion couples was demonstrated. The pile-up of concentration and activity of Ag or Cu was shown to be caused by the predominant mobility of Zn.

K.J.Roenkae, F.J.J.Van Loo, J.K.Kivilahti: Zeitschrift für Metallkunde, 1997, 88[1], 9-13