The wave mechanism of mass transfer in metals under pulsed irradiation

The mass transfer of the impurity particles from the surface to the bulk of a metal under the influence of the high power particles beams or the laser irradiation is considered within the local nonequilibrium model. 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 $t\le\tau_D$, where $\tau_D$ is the time of relaxation of the diffusion flux to its local equilibrium value, the wave mechanism of the mass transfer dominates over diffusion one. The assumptions concerning some experimental results are given.