Measurements for Cu and Si diffusivities in Al–Cu–Si alloys by diffusion couples

This paper deals with diffusivity measurements for Cu and Si atoms in Al–Cu–Si alloys by diffusion couples. With Cu and Si concentration profiles in the diffusion couples treated by different heating temperatures and times, their diffusivities including DCuCu, DSiSi, DCuSi and DSiCu in Al–Cu–Si ternary alloys could be calculated and their D0 and Q also could be obtained by their diffusivities under different temperatures.