Composition and interfacial tension at the boundary of nanoprecipitates and a matrix in a binary system

New relationships for the interfacial tension and composition at the boundary of phase precipitates of arbitrary (including nanometer) size and a matrix are derived as functions of the temperature in a binary system. The results from calculations for spherical nanoparticles with BCC and HCP structures in the liquid the phase, and with dispersal of a solid phase with HCP structure in a solid matrix having the BCC lattice in the Mo–Ru system are presented.