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Phase Equilibria of 450 °C Isothermal Section of Zn-Al-Mg-Si Quaternary System

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Abstract

The isothermal section of the Zn-Al-Mg-Si quaternary system at 450 °C with Zn fixed at 70 at.% has been determined by means of scanning electron microscopy, energy dispersive spectroscopy and x-ray diffraction. The results show that there exist the following equilibria regions in the isothermal section: Liq. + α-Al + MgZn2 + Mg2Si and Liq. + α-Al + Mg2Si + (Si) four-phase regions, and Liq. + α-Al + Mg2Si, Liq. + α-Al + MgZn2, Liq. + MgZn2 + Mg2Si, Liq. + α-Al + (Si) and Liq. + MgZn2 + (Si) three-phase regions. Si is almost insoluble in MgZn2 and α-Al. The maximum solubility of Al and Zn in Mg2Si is 1.8 and 6.1 at.%, respectively. The maximum solubility of Al and Si in MgZn2 is 3.2 and 0.5 at.%, respectively. No ternary and quaternary compounds were found in this study.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 51271041), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University, Changzhou, 213164, Jiangsu, People’s Republic of China

    Shuo Wang, Kun Ma, Ya Liu, Jianhua Wang & Xuping Su

  2. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, 213164, Jiangsu, People’s Republic of China

    Shuo Wang, Kun Ma, Ya Liu, Jianhua Wang & Xuping Su

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  1. Shuo Wang
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Correspondence to Jianhua Wang.

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Wang, S., Ma, K., Liu, Y. et al. Phase Equilibria of 450 °C Isothermal Section of Zn-Al-Mg-Si Quaternary System. J. Phase Equilib. Diffus. 38, 906–915 (2017). https://doi.org/10.1007/s11669-017-0599-7

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  • DOI: https://doi.org/10.1007/s11669-017-0599-7

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