The Influence of Thermal Diffusion on the Redistribution of Alloying Element between the Coating and Base under Surface Heating

Abstract

The problem has been analyzed on alloying elements redistribution between the coating (containing Cr and N) and the substrate (Si) in condition of surface heating. The model takes into account the effect of thermal diffusion on the redistribution of elements. The analytical solution of the particular linearized problem about redistribution of elements in the substrate coating is presented. It is shown that the thermal diffusion significantly affects the impurity distribution, resulting in the appearance of supersaturated or depleted regions.

Thermal Activated Elements Redistribution between Two-Component Coating and Substrate

“…In the case of thermal physical and diffusion parameters can be assumed to be constant, it is possible to obtain an exact analytical solution using Laplace transformations for non-stationary temperature [13] and the concentration [14,15] distribution When taking into account the reverse effect (heat transfer due to the presence of concentration gradients) analytical solution of the linearized problem is possible too. However we have to use an approximate analytical methods such as [16][17][18][19].…”