Diffusion in multiphase systems with nonstationary boundaries III. solution of diffusion in the region With boundaries moving in opposite directions

摘要

In the present work we solved the problem of diffusion of an element placed between the two-phase mixtureα+βand the two-phase mixtureβ+λ, and the interphase boundaries move in opposite directions with different movement velocities. The mathematical prob- lem is solved exactly using the thermal potentials of a double layer. The solution of the diffusion equation in the proximity of interphase boundaries was derived as well as the con- centration gradients on these boundires.