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Isothermal Section of the Al-Mn-Dy System at 500 °C

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Abstract

Phase relationships in the Al-Mn-Dy ternary system at 500 °C have been investigated by X-ray diffraction, scanning electron microscopy with energy dispersive spectroscopy, and electron probe microanalysis. From the experimental results it was concluded that the isothermal section consists of 16 single-phase regions, 26 two-phase regions and 12 three-phase regions. Two extensive solid solutions, (Al x Mn1−x )12Dy and (Al1−x Mn x )2Dy, were observed. The solid solution (Al x Mn1−x )12Dy forms by Al replacing Mn in Mn12Dy, while the continuous solid solution (Al1−x Mn x )2Dy forms by Mn and Al mutually substituting in Al2Dy and Mn2Dy, respectively. The maximum solid solubility of Al in Mn12Dy is 79.3 at.%.

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Acknowledgments

This work was jointly supported by Guangxi Natural Science Foundation (No. 2013GXNSFAA019315), Guangxi Educational Institute Science Project (YB2014108), Guangxi Undergraduate Student Innovation project (2013CX061), and Science Project of Guangxi University for Nationalities (2011MDYB039).

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  1. School of Science, Guangxi University for Nationalities, Nanning, 530006, Guangxi, China

    Jie-li Meng, Jian-lie Liang, Jin-ming Zhu & Kai-zhen Li

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Meng, Jl., Liang, Jl., Zhu, Jm. et al. Isothermal Section of the Al-Mn-Dy System at 500 °C. J. Phase Equilib. Diffus. 37, 718–725 (2016). https://doi.org/10.1007/s11669-016-0502-y

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