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Icosahedral quasicrystalline phase in an as-cast Mg-Zn-Er alloy

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Abstract

The microstructure of an as-cast Mg-Zn-Er alloy was investigated through scanning electron microscopy (SEM) and transmission electron microscopy (TEM) equipped with energy dispersive spectroscopy (EDS). The results indicate that two different second phases, one with eutectoid-lamellar morphology and the other with granular shape, distribute in the α-Mg matrix. The coexistence of the face-centered icosahedral quasicrystalline phase (I-phase) and W-phase with the face-centered cubic structure is found in the as-cast alloy. The coexistence of I-phase and W-phase in the Mg-Zn-Er alloy is because the W-phase is the primary phase and the I-phase forms by peritectic reaction during solidification.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China

    Jianhui Li, Wenbo Du, Shubo Li & Zhaohui Wang

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  1. Jianhui Li
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  2. Wenbo Du
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  3. Shubo Li
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  4. Zhaohui Wang
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Correspondence to Jianhui Li.

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Li, J., Du, W., Li, S. et al. Icosahedral quasicrystalline phase in an as-cast Mg-Zn-Er alloy. Rare Metals 28, 297–301 (2009). https://doi.org/10.1007/s12598-009-0058-7

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  • DOI: https://doi.org/10.1007/s12598-009-0058-7

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