Thermodynamic Evaluation and Optimization of Al–Gd, Al–Tb, Al–Dy, Al–Ho and Al–Er Systems Using a Modified Quasichemical Model for the Liquid
- Thermodynamic Evaluation and Optimization of Al–Gd, Al–Tb, Al–Dy, Al–Ho and Al–Er Systems Using a Modified Quasichemical Model for the Liquid
- Liling Jin; Kang, YB; Patrice Chartrand; Carlton D. Fuerst
- Date Issued
- PERGAMON-ELSEVIER SCIENCE LTD
- The Al-Gd Al-Tb Al-Dy Al-Ho and Al-Er (Al-heavy rare earths) binary systems have been systematically assessed and optimized based on the available experimental data and ab-initio data using the FactSage thermodynamic software A systematic technique (reduced melting temperature proposed by Gschneidner) was used for estimating the Al-Tb phase diagram due to lack of experimental data Optimized model parameters of the Gibbs energies for all phases which reproduced all the reliable experimental data to satisfaction have been obtained The optimization procedure was biased by putting a strong emphasis on the observed trends in the thermodynamic properties of Al-RE phases The Modified Quasichemical Model which takes short-range ordering into account is used for the liquid phase and the Compound Energy Formalism is used for the solid solutions in the binary systems It is shown that the Modified Quasichemical Model used for the liquid alloys permits one to obtain entropies of mixing that are more reliable than that based on the Bragg-Williams random mixing model which does not take short-range ordering Into account (C) 2010 Elsevier Ltd All rights reserved
- Aluminum-rare earth alloys; Modified Quasichemical Model; Thermodynamic modeling; Phase diagram; ALUMINIUM-RICH PARTS; RARE-EARTH-METALS; MG TERNARY-SYSTEM; MN-Y SYSTEM; PHASE-EQUILIBRIA; INTERMETALLIC COMPOUNDS; LANTHANIDE COMPOUNDS; BINARY-SYSTEMS; ALLOYING BEHAVIOR; ENTHALPIES
- Article Type
- CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, vol. 34, no. 4, page. 456 - 466, 2010-12
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.