Experimental investigation and thermodynamic modeling of the Cr–Zr–Si system
Source abstract
Abstract
The phase equilibria of the Cr–Zr–Si ternary system were studied combined with the key experiments and thermodynamic assessment. Thirty-five ternary alloys were prepared to determine the isothermal sections at 900 and 1000 °C by means of X-ray diffraction (XRD) and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDS). Five ternary compounds, i.e., τ1 (CrSi2Zr), τ2 (Cr4Si5Zr2), τ3 (Cr4Si7Zr4), τ4 (CrSiZr) and τ5 (Cr3SiZr2), were confirmed. The solubilities of the third element in binary compounds were determined. Based on the experimental phase equilibria data available in the present work and the literature, as well as the thermodynamic parameters of constitutive binary systems, the Cr–Zr–Si system was evaluated by using the CALPHAD (CALculation of PHAse Diagram) method. A set of self-consistent thermodynamic parameters was obtained. Three isothermal sections and liquidus projection were calculated and the reaction scheme was constructed. The calculated results are in agreement with the experimental data.
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Research context
OpenAlex topics: Intermetallics and Advanced Alloy Properties · High Temperature Alloys and Creep · Nuclear Materials and Properties
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