Abstract
Based on the techniques of scanning electron microscopy equipped with energy dispersive X-ray spectroscopy, X-ray powder diffraction, and Electron probe microanalysis (EPMA), the 723 K (450 °C) isothermal section of the Zn-Al-Zr ternary system has been determined using equilibrated alloy method with the aid of diffusion couple approach. The ternary compound Zn50Al25Zr25, named T phase in the present work, is confirmed to be stable at 723 K (450 °C), and it has a very large composition rang of Zn from 11.9 to 58.5 at. pct. The T phase is in equilibrium with all the binary phases except Zr3Al, Zr2Al, ZnZr, and Zn2Zr. The maximum solubility of Zn in ZrAl3, Zr2Al3, ZrAl, Zr4Al3, Zr3Al2, Zr2Al, and Zr3Al is 2.8 (measured by EDS), 1.00, 1.17, 0.82, 0.48, 0.78, and 1.52 (measured by EPMA) at. pct, respectively. The maximum solubility of Al in ZnZr, Zn2Zr, and Zn3Zr is 10.3, 3.9 and 10.44 at. pct, respectively.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. 51471141 and No.51471140) and Scientific Research Fund of Hunan Provincial Science and Technology Department (No. 2014FJ2010).
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Manuscript submitted January 2, 2015.
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Chen, L., Yin, F., Ouyang, X. et al. Experimental Investigation of the Phase Equilibria of the Zn-Al-Zr Ternary System at 723 K (450 °C). Metall Mater Trans A 46, 4956–4965 (2015). https://doi.org/10.1007/s11661-015-3125-8
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DOI: https://doi.org/10.1007/s11661-015-3125-8