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Determination of the Phase Equilibria in the Mg-Ag-Ca Ternary System at 350 °C

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Abstract

The phase equilibria in the Mg-Ag-Ca ternary system, in the composition range 0–35 at% Ca at 350 °C were investigated using 21 alloy specimens. Scanning electron microscopy equipped with an energy-dispersive spectroscope and electron probe micro-analysis were employed to analyze the constituted phases and their compositions in the alloy samples. X-ray diffraction was used to analyze the crystal structure of the constituted phases in selected samples. Four new phases named as P1, P2, P3, and P4 were found in this work. The compound P1 has a wide composition range: 52–72% Mg, 13–28% Ag, and 15–17% Ca (at.%); P2 has a narrow solid solubility: 29–33% Mg, 35–40% Ag, and 31–32% Ca (at.%) at 350 °C; in the present work, P4 was detected in the composition range: 12–19 at.% Mg, 59–61 at.% Ag, and 21–27 at.% Ca. In addition, the 2θ of diffraction peaks of four new phases and nine three-phase equilibrium relationships were determined in the present work.

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Acknowledgment

Financial supports from the Natural Science Foundation of China (51901202) and the Natural Science Foundation of Jiangsu Province (No. BK20191442) are gratefully acknowledged. The support of the electron microscopy characterization from Prof. Limin Yuan from center for instrumental analysis of Yangzhou University is acknowledged by the authors.

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Authors and Affiliations

  1. School of Mechanical Engineering, Yangzhou University, Yangzhou, 225127, China

    Lingyu Zhao, Beian Zhou, Zhang Zhang, Qinghang Wang, Zhaoyang Jin & Jian Wang

  2. Institute of Materials and Processing, Guangdong Academy of Sciences, Guangzhou, 510650, China

    Bo Feng

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Correspondence to Lingyu Zhao or Jian Wang.

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No conflict of interest exits in the submission of this manuscript, and manuscript is approved by all authors for publication. I would like to declare on behalf of my co-authors that the work described was original research that has not been published previously, and not under consideration for publication elsewhere, in whole or in part. All the authors listed have approved the manuscript that is enclosed.

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Zhao, L., Zhou, B., Zhang, Z. et al. Determination of the Phase Equilibria in the Mg-Ag-Ca Ternary System at 350 °C. J. Phase Equilib. Diffus. 42, 831–841 (2021). https://doi.org/10.1007/s11669-021-00926-5

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