Modeling of Thermodynamic Properties and Phase Equilibria for the Al-Sm Binary System

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-α and Al4Sm-γ 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

Thermodynamische Untersuchungen monotektischer Systeme und von Systemen mit kongruent schmelzenden Phasen

Available from TIB Hannover: DW 1223 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

A thermodynamic study of liquid Fe-Si-B alloys : an influence of ternary associates on a liquid → glass transition

Knudsen-cell mass spectrometry and the integral variant of effusion method have been applied to investigate the thermodynamic properties of liquid Fe-Si-B alloys at temperatures from 1423 to 1894 K over concentration intervals of 9-88.8 at. pct Fe. 2.6-81.4 at. pct Si, and 7.5-50 at. pct B. The activity values of the components and the Gibbs energy of the Fe-Si-B melt formation have been determined over a wide temperature-concentration range. The concentration and temperature dependences of the thermodynamic functions of liquid Fe-Si-B alloy have been described adequately within the ideal associated-solution model under the assumption that binary and ternary associates exist in the melt. The relevance of the model was tested in the undercooled region. The glass-forming ability of the melt as shown could be interpreted in terms of the thermodynamic parameters of the association reactions. A specific role of ternary interaction was clarified