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The Ag-Zr and Cu-Zr binary systems are thermodynamically reassessed in this study. Not only phase diagrams, but also thermodynamic properties, such as enthalpy of formation for solids, activity for liquid, and enthalpy of mixing for liquid, are all calculated and compared with available experimental data to assure the accuracy of the assessment. Cu2Zr and Cu24Zr13 phases are considered as meta-stable...
A new inherently consistent temperature function for interaction parameters, L, is proposed. It is designed for the unconstrained application of any optimization software, such as PanOptimizer or PARROT, to avoid artifacts, for example inverted liquid miscibility gaps or re-stabilization of liquid well below solidus. Without introducing additional system-dependent adjustable parameters, the new function...
A comprehensive thermodynamic reassessment of the Al–Cu–Zn system is elaborated covering the complete ternary composition range and compared with all presently available experimental phase equilibrium and thermodynamic data. One key distinction compared to previous CALPHAD work is the thermodynamic modeling of the γ phases, which is based on a detailed discussion of the crystal structure and simplified...
The thermodynamic description of the Cu–Zn system is reassessed based on all original experimental data. Previous work on that subject is critically analyzed and the need for improvement is worked out. Tracing back to the original experimental data, the δ phase is acknowledged as hexagonal structure and thus modeled as a separate phase from the Bcc phase. An improved quantitative description of original...
The thermodynamic description of the Al–Cu system is reassessed, and for the first time all available experimental data have been comprehensively compared with calculated results. Key distinctions from previous Calphad descriptions are worked out. The new model for the γ1 and γ2 phases partially reflects the crystal structure while being sufficiently simple for a realistic joining with the γ-CuZn...
All directly measured experimental data on phase equilibria and thermodynamic data of the Al–P system are critically reviewed, based on meticulous analysis of original sources. Confusion in the literature, especially regarding the reference state of phosphorous, is clarified. Based on these digested original data a consistent thermodynamic description is developed using the Calphad method. For the...
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