Diffusion of Nickel in Silver

Abstract

The diffusion coefficient of nickel in single-crystal of silver has been measured by the lathe-sectioning technique as a function of temperature throughout the range from 750°C to 950°C using radioactive isotope Ni⁶³ as a tracer. The results are expressed as follows:
D=(21.9)exp\left(−\frac54 800RT\ ight) cm²⁄sec.
The value of activation energy, 54.8 kcal/mole, obtained by the present experiment is in good agreement with the result of the screening theory of impurity diffusion.