X.Y. Liu , P.P. Liu , C. Tan , S.Y. Yang , Y.C. Bai , J. Wang , G.H. Rao , H.Y. Zhou
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Thermodynamic description of the La–Co–Fe and Ce–Co–Fe ternary systems
Based on the available experimental data reported in the literature, the La–Co and Ce–Co binary systems were re-assessed thermodynamically using the CALPHAD method in this work. The calculated phase diagrams and thermodynamic properties of the La–Co and Ce–Co binary systems are well consistent with the experimental results. Furthermore, the La–Co–Fe and Ce–Co–Fe ternary systems were calculated by combining the re-assessed La–Co and Ce–Co binary systems in this work with the previous assessments of the La–Fe, Ce–Fe and Co–Fe binary systems. The calculated liquidus projections, isothermal sections and vertical sections in the La–Co–Fe and Ce–Co–Fe ternary systems are in good agreement with the experimental results. The reasonable thermodynamic parameters of the La–Co–Fe and Ce–Co–Fe ternary systems were obtained in this work, which would be fundamental to developing a thermodynamic database of the multi-component RE-TM-Fe alloy systems, and then to designing novel RE2Fe17-xTMx magnets with light rare-earth metals La and Ce.
期刊介绍:
The design of industrial processes requires reliable thermodynamic data. CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) aims to promote computational thermodynamics through development of models to represent thermodynamic properties for various phases which permit prediction of properties of multicomponent systems from those of binary and ternary subsystems, critical assessment of data and their incorporation into self-consistent databases, development of software to optimize and derive thermodynamic parameters and the development and use of databanks for calculations to improve understanding of various industrial and technological processes. This work is disseminated through the CALPHAD journal and its annual conference.