Diffusion of Cadmium, Indium, and Tin in Single Crystals of Silver

Abstract

The diffusion coefficient of cadmium, indium, and tin tracers in single crystals of pure silver has been measured as a function of temperature over the range 592-937°C. The activation energies and frequency factors were determined, yielding $D=0.44\mathrm{}\exp (-\frac{41700}{\mathrm{RT}})$ for the cadmium tracer, $D=0.41\mathrm{}\exp (-\frac{40630}{\mathrm{RT}})$ for indium, and $D=0.25\mathrm{}\exp (-\frac{39300}{\mathrm{RT}})$ ${\mathrm{cm}}^2$/sec for tin. These values are in marked disagreement with the older data. The results of the present work are discussed in terms of Lazarus' theory and Zener's theory. Both theories give fair agreement with the experimental data.