Local non-equilibrium theory analysis of the mass transfer in heterogeneous systems under concentrated energy flux irradiation

A space-time nonlocal mass transfer of the impurity particles from the surface to the bulk of a metallic systems under the influence of the high power particles beams or the laser irradiation is analyzed. The impurity concentration profiles have been obtained on the basis of the numerical solution of the integro-differential equation for the diffusion flux. It has been shown that for the time of observation smaller than the relaxation time of the diffusion flux to its local equilibrium value, the wave mechanism of the mass transfer dominates over diffusion one. A comparison of model calculations with some of the experimental data is presented.