Features of the phase formation in the nanocomposites

Thermodynamic conditions of formation of critical nuclei in the composites that are the phase forming medium, a matrix with inclusions of nanoparticles of the other phase, are considered. It is shown that depending on the nature of the spatial distribution of nanoparticles in the matrix, critical nuclei of different shapes may appear at the phase formation. In some cases the formation and stable existence of metastable phases, including amorphous ones is possible. The conditions of formation in the nanocomposites of the critical nuclei of heterogeneous structure are determined. The experimental data on the phase formation in the nanocomposites ZrO2-Al(OH)(3) and ZrO2-SiO2 were analyzed and the earlier described feature of formation of the new phase nuclei is confirmed theoretically.