The interdiffusion coefficients in melts with mean compositions of Al77Ni20Ce3 and Al87Ni10Ce3 were measured at 1373 and 1273K, respectively, by using the long-capillary technique. Darken’s concept of linearly combining the diffusive flux with gradients of the chemical potential was invoked in order to study the influence of thermodynamic forces upon diffusion in metallic multi-component melts. The enhancement of interdiffusion, as compared to self-diffusion, scaled with the thermodynamic factor and the interdiffusion coefficients scaled linearly with the respective thermodynamic factors; thus proving Darken’s concept for metallic multi-component melts.

First Results from Diffusion Measurements in Liquid Multicomponent Al-Based Alloys. A.Griesche, M.P.Macht, G.Frohberg: Journal of Non-Crystalline Solids, 2007, 353[32-40], 3305-9