Abstract
The Kirkendall shift in Cu/Cu-14.7 at% Al diffusion-couples has been measured at 900° and 1000°C. Self-diffusion coefficients of aluminum, DAl*, were evaluated from the results on the Kirkendall shift obtained in the present experiments together with the data on the self-diffusion of copper (Kucera and Million, 1970) and of the interdiffusion (Oikawa et al., 1970) in this solid solution. The ratio, DAl*⁄DCu*, is about 2.2 in pure copper and about 1.8 in the Cu-9 at% Al alloy. The ratio of the self-diffusion coefficient in the alloy to that in pure copper is about 1.6 for aluminum, while the ratio for copper is about 1.9.
