The diffusivity in the solid-solution -phase of this system was determined by using sandwich-type diffusion couples. An analysis of the concentration profiles revealed that the diffusivity in the -phase depended upon the composition, and was related to the melting point of the alloy. The data indicated that Ti diffused as rapidly as Al; in spite of the much higher melting point of Ti. This behavior was attributed to strong bonding between Ti and Al.

F.Ebrahimi, J.G.L.Ruiz-Aparicio: Journal of Alloys and Compounds, 1996, 245[1-2], 1-9