Modeling of thermodynamic properties and phase equilibria for the Cu-Mg binary system
| Title | Modeling of thermodynamic properties and phase equilibria for the Cu-Mg binary system |
| Publication Type | Journal Article |
| Year of Publication | 2007 |
| Authors | Zhou SH, Wang Y, Shi FG, Sommer F, Chen LQ, Liu ZK, Napolitano RE |
| Journal Title | Journal of Phase Equilibria and Diffusion |
| Volume | 28 |
| Pages | 158-166 |
| Date Published | Apr |
| Type of Article | Article |
| ISBN Number | 1547-7037 |
| Accession Number | ISI:000247833600004 |
| Keywords | ASSOCIATION MODEL, BULK GLASSY, COPPER-MAGNESIUM ALLOYS, LAVES PHASES, liquid alloys, mechanical-properties, metallic glasses, NANOCRYSTALLINE ALLOYS, NANOQUASICRYSTALLINE, phase diagram, phase equilibria, PROGRESS, RECENT, thermodynamics |
| Abstract | The phase equilibria associated with the binary Cu-Mg system are analyzed by applying results from first-principles calculations to a general solution thermodynamics treatment. Differing from previously reported models, we employ a four-species association model for the liquid, while the terminal and intermediate solid phases are modeled as substitutional solutions with one or two sublattices, respectively. The zero-Kelvin enthalpies of formation for the intermediate compounds, CU2Mg-C15 (cF24) and CuMg2-C-b (oF48) are computed using the Vienna Ab-initio Simulation Package (VASP). The Gibbs free energy functions for the individual phases are evaluated, and the resulting binary phase diagram is presented over the full composition range. While the phase diagram we propose exhibits only modest deviation from previously reported models of phase equilibria, our treatment provides better agreement with experimental reports of heat capacity and enthalpy of mixing, indicating a more self-consistent thermodynamic description of this binary system. |
| DOI | 10.1007/s11669-007-9022-0 |
| Alternate Journal | J. Phase Equilib. Diffus. |
