Thermodynamic assessment of the Zn–Y and Al–Zn–Y systems

• Published in: Journal of alloys and compounds Vol. 452; no. 2; pp. 283 - 290
• Main Authors: Liu, X.J., Wen, M.Z., Wang, C.P., Pan, F.S.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 20.03.2008; Elsevier
• Subjects: Al–Zn–Y system; CALPHAD method; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Phase diagram; Phase diagrams and microstructures developed by solidification and solid-solid phase transformations; Phase diagrams of metals and alloys; Physics; Thermodynamic assessment; Zn–Y system; CALPHAD method; Zn–Y system; Phase diagram; Al–Zn–Y system; Thermodynamic assessment; Phase diagrams; Gibbs free energy; Ternary systems; Zn-Y system; Yttrium alloys; Binary systems; Zinc alloys; Aluminium alloys; Thermodynamic model; BCC lattices; Sublattices; Al-Zn-Y system; Phase equilibria; HCP lattices; Thermodynamic properties
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2006.11.029

The phase diagram in the Zn–Y binary system has been evaluated by using the CALPHAD (Calculation of Phase Diagrams) method with the experimental data of the phase equilibria and thermodynamic properties. The Gibbs free energies of the liquid, bcc and hcp phases were described by the subregular solution model with the Redlich–Kister equation, and those of the eight stoichiometric compounds of the YZn, YZn 2, YZn 3, Y 3Zn 11, Y 13Zn 58, YZn 5, Y 2Zn 17 and YZn 12 were described by the sublattice model. The thermodynamic parameters in the Al–Zn–Y system were also evaluated by combining the experimental data with the parameters in three binary systems. The calculated phase equilibria and thermodynamic properties are in good agreement with the experimental data.