Heat and Mass Transfer Peculiarities in Alloying Metal Surfaces with Application of Nanosecond Laser Radiation in Air Environment and Through Transparent Coating

Experimental study results of mass transfer in alloying the nickel surface with gold atoms applying the laser radiation are given. Laser pulses with nanosecond duration were used to implement very non-equilibrium conditions. Transport process peculiarities are considered for cases of laser radiation in air environment and through the transparent coating. The mathematical simulation of temperature fields for the "Au-film-Ni-substrate" system has been conducted, which allows explaining the increased efficiency of alloying in case of using the transparent coating.