Modeling of thermodynamic properties and phase equilibria for the Al-Sm binary system

TitleModeling of thermodynamic properties and phase equilibria for the Al-Sm binary system
Publication TypeJournal Article
Year of Publication2008
AuthorsZhou SH, Napolitano RE
Journal TitleMetallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
Volume39A
Pages502-512
Date Published03
Type of ArticleArticle
ISBN Number1073-5623
Accession NumberISI:000253133500003
Keywordsaluminum, amorphous-alloys, ASSOCIATION MODEL, CERIUM, CRYSTALLIZATION, ENTHALPIES, intermetallic compounds, la, liquid alloys, MOLAR, PSEUDOPOTENTIALS
Abstract

The thermodynamic properties and associated phase equilibria for the Al-Sm binary system are examined, and experimental results regarding the stability of the Al3Sm, Al11Sm3, and Al4Sm intermetallics are incorporated. In the analysis presented, the liquid phase is described using a three-species association model, the intermediate phases are treated as stoichiometric compounds, and the terminal phases are treated as solid solutions with a single sublattice model. In addition to the stable phases, thermodynamic descriptions of the metastable Al11Sm3-alpha and Al4Sm-gamma phases are employed, and both stable and metastable phase equilibria are presented over the full composition range, providing a general model, which is consistent with available experimental data. Metastable liquidus curves are examined with respect to the observed crystallization behavior of amorphous Al-Sm alloys.

DOI10.1007/s11661-007-9445-6
Alternate JournalMetall. Mater. Trans. A-Phys. Metall. Mater. Sci.