β Scribed by E. Rabkin
No coin nor oath required. For personal study only.
The grain boundary diffusion in a binary system which exhibits a grain boundary phase transition is considered in the framework of Fisher's model. The kinetic law of the growth of the grain boundary phase and the distribution of the diffusant near the grain boundary are calculated. The method of determining of the concentration dependence of the grain boundary diffusion coefficient from the experimentally measured penetration profiles of the diffusant along the grain boundaries is suggested. The experimental results on Zn diffusion in Fe(Si) bicrystals, Ni diffusion in Cu bicrystals and grain boundary grooving in A1 in the presence of liquid In are discussed in light of the suggested model.
π SIMILAR VOLUMES
Grain boundary diffusion of "%n in Ni was measured between T = 673 and 1182 K using microtome sectioning and a well type Ge-detector of large efficiency and high energy resolution. In this large temperature range s6D,, varies over six orders of magnitude. The Arrhenius plot of s6D,, shows a remarkab