  Molecular dynamics simulations of the interface structure in binary AgCu
eutectic were performed by using the realistic EAM potential. In simulations,
we examined such quantities as the time dependence of the total energy in the
process of equilibration, the probability distributions, the composition
profiles for the components, and the component diffusivities within the
interface zone. It is shown that the equilibrium in the solid state associated
with the complete phase separation in binary eutectic is accompanied by
formation of the steady disordered diffusion zone at the boundary of the
crystalline components. At higher temperatures, closer to the eutectic point,
the increase in the width of the steady diffusion zone is observed. The
particle diffusivities grow therewith to the numbers typical for the liquid
phase. Above the eutectic point, the steady zone does not form, instead, the
complete contact melting in the system occurs. The results of simulations
indicate that during the temperature increase the phenomenon of contact melting
is preceded by the similar process spatially localized in the vicinity of the
interface.
