Experimental determination and thermodynamic assessment of the Zr-Cr-Y ternary system
QIAO Hui1,2, HU Biao1,2, ZENG Gang1,2, JIN Chenggang1,2, GAO Jian1,2
1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China; 2. Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health,Huainan 232001, China
Abstract：The phase equilibria of the Zr-Cr-Y system was investigated by combination of key experiments and CALPHAD (calculation of phase diagrams) methods. Eight ternary alloys were prepared to determine the isothermal sections of the Zr-Cr-Y system at 1 000, 900, 800 and 600 ℃ by means of X-ray diffraction (XRD) and scanning electron microscope with energy dispersive X-ray spectroscopy (SEM/EDS). The results show that there are three-phase regions, i.e., BCC(Cr)+HCP(Y)+αCr2Zr, BCC(Zr)+HCP(Y)+αCr2Zr and HCP(Zr)+HCP(Y)+αCr2Zr in this system. Based on the experimental equilibria data obtained in the present work, thermodynamic modeling of the Zr-Cr-Y ternary system was performed by the CALPHAD method. A set of accurate thermodynamic parameters of the Zr-Cr-Y system were obtained. The calculated results are in good agreement with most of the reliable experimental data.
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2022, Vol. 27 
