Thermodynamic Reassessment of the Na-Cu and Na-K Binary Systems

Evgeny Trofimov (1) , Olga Samoilova (1) , Olga Zaitseva (1) , Elena Vakhitova (2)

1 SUSU - South Ural State University
2 LASMIS - Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée

The Na-Cu and Na-K systems are of significant interest due to the use of liquid sodium and melt of sodium and potassium in the nuclear industry as a cooling agent in nuclear reactors. In the present work, thermodynamic modeling of phase equilibria in the Na-Cu and Na-K systems is carried out, based on the available published experimental data. This modeling was done using the “FactSage” software package (version 7.0). The set of Redlich-Kister equation parameters was obtained, which allows one to describe the dependence of Gibbs energy from composition and temperature for solutions that can be formed in the studied systems. Phase diagrams (T-x diagrams) of the investigated systems were calculated.

Keywords: the Na-Cu system; the Na-K system; thermodynamic modeling; phase diagrams

Domains: Mechanics of materials [physics.class-ph]

Evgeny Trofimov, Olga Samoilova, Olga Zaitseva, Elena Vakhitova. Thermodynamic Reassessment of the Na-Cu and Na-K Binary Systems. Metals, 2018, 8 (8), pp.629. ⟨10.3390/met8080629⟩. ⟨hal-02283281⟩