THERMODYNAMIC PROPERTIES CALCULATION FOR HIGH TEMPERATURE COOLANTS BASED ON BINARY LIQUID METAL SYSTEMS WITH CONTINUOUS ROW OF SOLID SOLUTIONS

摘要

The authors suggest the method for calculation of the thermodynamic properties (Gibbs' partial energy, activity of the components) on the boundary curves of the phase equilibrium diagram for the binary azeotropic intermetallic systems with a continuous series of solid solutions. The method is based on the use of general equiations of the thermodynamic equilibrium without any model representation of the liquid properties. The calculation makes use of the property of mutual binary solutions of the alkali metals consisting in that there exists a sufficiently extended Raoult's zone in the region of the diluted solutioins. The method provides for calculation of the properties simultaneously on both phase equilibrium curves — on the liquidus and solidus lines, i.e. for the liquid and solid solutions. The method is demonstrated for a typical azeotropic intermetallic system with weak interparticle interaction Cs-K.