201. Thermodynamic assessments of the Ag–Er and Er–Y systems
- Author
-
Cheng Wang, X.J. Liu, Fu Sheng Pan, S.L. Wang, Aitao Tang, and Kiyohito Ishida
- Subjects
Chemistry ,Mechanical Engineering ,Metals and Alloys ,Intermetallic ,Thermodynamics ,Entropy of mixing ,Gibbs free energy ,Condensed Matter::Materials Science ,symbols.namesake ,Mechanics of Materials ,Phase (matter) ,Materials Chemistry ,symbols ,Binary system ,Material properties ,CALPHAD ,Phase diagram - Abstract
The phase diagrams and thermodynamic properties in the Ag–Er and Er–Y binary systems have been assessed by using the CALPHAD (Calculation of Phase Diagrams) method on the basis of the experimental data including the thermodynamic properties and phase equilibria. The Gibbs free energies of the liquid, bcc, fcc, and hcp phases were described by the subregular solution model with the Redlich–Kister equation, and those of intermetallic compounds (Ag2Er and AgEr phases) were treated as stoichiometric compounds, and Ag51Er14 phase was modeled by the sublattice model in the Ag–Er binary system. The thermodynamic parameters of the Ag–Er and Er–Y binary systems were obtained, and an agreement between the calculated results and experimental data was obtained for each binary system.
- Published
- 2010