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Experimental Investigation of the Al-Cr-Gd Ternary System at 773 K

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Abstract

Physical-chemical analysis apparatuses, including X-ray powder diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy dispersive analysis (EDX) were employed in constructing the isothermal section of the Al-Cr-Gd system at 773 K for the first time. The existence of 10 binary compounds (i.e., Al7Cr, Al4Cr, α-Al9Cr4, α-Al8Cr5, AlCr2, Al3Gd, Al2Gd, AlGd, Al2Gd3 and AlGd2) and three ternary compounds (i.e., Al43Cr4Gd6, Al20Cr2Gd and Al8Cr4Gd) were confirmed. The isothermal section consists of 16 single-phase regions, 18 two-phase regions and 16 three-phase regions. The maximum homogeneity ranges of Al7Cr,Al4Cr, α-Al9Cr4, α-Al8Cr5 and AlCr2 were determined to be 13-14, 19-21, 30-34, 34-42 and 62-71 at.% Cr, respectively. The homogeneity range of Cr in the binary Al-Cr system ranges from 0 to 20 at.% at 773 K. No detectable solubility can be found in the other phases.

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Acknowledgments

This research work is supported by National Natural Science Foundation of China (50831007), Guangxi Natural Science Foundation (2011GXNSFA018017) and the Guangxi Science and Technology Development Project (1114003-1).

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  1. Laboratory of Nonferrous Metal Materials and New Processing Technology, Ministry of Education, Guangxi University, Nanning, 530004, Guangxi, People’s Republic of China

    Maoxing Ling, Yong Liang, Shuangjie Wei, Ya Liu, Mingjun Pang & Yongzhong Zhan

  2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, Hunan, People’s Republic of China

    Yong Du

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Ling, M., Liang, Y., Wei, S. et al. Experimental Investigation of the Al-Cr-Gd Ternary System at 773 K. J. Phase Equilib. Diffus. 33, 203–209 (2012). https://doi.org/10.1007/s11669-012-0032-1

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