A thermodynamic assessment of the Cd-Mg system

作者：Ren Xin; Li Changrong^*; Guo Cuiping; Du Zhenmin

来源：Thermochimica Acta, 2012, 534: 1-8.

DOI：10.1016/j.tca.2012.01.016

• Cd-Mg system
• Thermodynamic assessment
• CALPHAD technique

On the basis of the experimental thermochemical and phase equilibrium data, the computational thermodynamic description of the Cd-Mg binary system is performed using CALPHAD technique. The solution phases, liquid and disordered Hcp_A3, are described as a substitutional model, and the excess Gibbs energies formulated with Redlich-Kister expression. The ordered phases, Cd3Mg. CdMg and CdMg3, are treated as the AB(3) phase and modeled using four-sublattices. The order-disorder transformation between the AB(3) and the Hcp_A3 phases is considered, so that the substitutional model for the Hcp_A3 disordered phase is extended into the four-sublattice model for the AB(3) ordered phase. The thermochemical properties as well as the phase diagram of the Cd-Mg binary system are predicted. A set of self-consistent thermodynamic parameters has been obtained. The consistency between the calculated results and the reported data of both the phase equilibria and the thermochemical properties has been achieved.

• 出版日期2012-4-20
• 单位北京科技大学