CHARACTERISTIC OF EQUILIBRIUM STATES IN SYSTEMS WITH INTERMETALLIC COMPOUNDS

Descriptions of equilibrium states between metal's solutions and inter metallic compounds being formed are presented in this paper. Propertie s of equilibrium constant of intermetallic compound formation, and con centration part K-z of this constant were particularly analyzed. It wa s assumed in this interpretation, that intermetallic compounds disappe ared on the solution boundary, and on the limit very diluted two-compo nent solutions were obtained. Consequently, obtained forms of logarith m function for intermetallic compound activity coefficient f(3) were e ssentially different of those, present in the literature. Analysis of function of activity coefficients for solution's components, made in t his paper, led to the conclusion that some of the parameters (K-z, a(3 ), (z) over bar, f(3)) reached extreme values in so called solution's stoichiometric concentration.