Calculation of composition in LaB6–TiB2 and LaB6–ZrB2 eutectics by means of pseudopotential method

A method of aprioristic pseudo-potential and an internal energy of individual components of composite materials are introduced that allows prediction of eutectic composition for the eutectic invariant point of LaB6–TiB2 and LaB6–ZrB2 system. The numerical predictions agreed well with the experimental data for eutectic composition. We determined the crystal lattice parameters and demonstrated the insolubility of the constituent phases of LaB6–TiB2 and LaB6–ZrB2 eutectic systems. The experimental results validated the predictions for the lattice constants of the constituent phases. The transferability of these potentials by including kinetic energy components has been discussed.