Thermodynamic description of the Re-Zr system

摘要

The Re-Zr system was critically assessed by means of the CALPHAD (CALculation of PHAse Diagram) technique. The excess Gibbs energies of the solution phases (liquid, hexagonal close-packed (Re), hexagonal close-packed (Zr), and body-centered cubic) were modeled with the Redlich-Kister equation. Three intermetallic compounds, Re24Zr5, Re2Zr, and ReZr2, in the Re-Zr system were treated as the formula units (Re,Zr)24(Re,Zr)5, (Re,Zr)2(Re,Zr)1 and (Re)1(Zr)2, respectively. A set of self-consistent thermodynamic parameters of the Re-Zr system was obtained.