Energy states and PV-diagrams of borides of transition metals

The paired-potential model of atomic interactions in diborides and hexabori des of transition metals is considered The parameters of the Mie-Gruneisen, Morse, Buckingham, and Rose potentials are determined and the E(V)- and P( V)-diagrams of these compounds are calculated The critical characteristics of the pressure and volume of the P(V)-diagrams, which determine the ultima te strength in uniform tension and the corresponding critical elastic strai n, are determined. Special features of the potentials and P(V)-diagrams of the borides are discussed.