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Medium-range Order of Zr54Cu38Al8 Bulk Metallic Glass

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Abstract

We have previously reported, based on fluctuation electron microscopy (FEM) data, that Zr50Cu45Al5 bulk metallic glass (BMG) contains significant icosahedral and crystal-like medium-range order. Here, we report similar finding for Zr54Cu38Al8 BMG, which is a poorer glass former. Like Zr50Cu45Al5, Zr54Cu38Al8 contains icosahedral and crystal-like structures. In the as-cast state, the crystal-like peak in the FEM data is stronger than icosahedral-like peak. After annealing at 0.83Tg (573 K), the icosahedral-like peak increases, but, unlike Zr50Cu45Al5, the crystal-like peak does not decrease. This tendency toward stronger, more thermally stable crystal-like order may be associated with the poorer glass forming ability of Zr54Cu38Al8.

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Authors and Affiliations

  1. Materials Science and Engineering, University of Wisconsin, Madison, WI, 53711, USA

    Pei Zhang & P. M. Voyles

  2. Ames Laboratory, Ames, IA, 50011, USA

    M. F. Besser & M. J. Kramer

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  1. Pei Zhang
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  2. M. F. Besser
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  3. M. J. Kramer
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  4. P. M. Voyles
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Zhang, P., Besser, M.F., Kramer, M.J. et al. Medium-range Order of Zr54Cu38Al8 Bulk Metallic Glass. MRS Online Proceedings Library 1649, 809 (2014). https://doi.org/10.1557/opl.2014.95

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