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A Cu-based amorphous alloy with a simultaneous improvement in its glass forming ability and plasticity

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Abstract

An amorphous alloy, Cu43Zr43Al7Be7, was synthesized. The alloy showed a large supercooled liquid region (115 °C), a significant glass forming ability (Φ12 mm) and considerable strain to fracture (8–9%), which collectively have not been observed in other Cu-based amorphous alloys. The alloy has a unique microstructure characterized by atomic-scale phase separation, which most likely resulted from the large difference in the mixing enthalpy between the binary pairs. This study discusses a possible mechanism underlying the simultaneous enhancement in the GFA and plasticity by considering the atomic packing state and atomic-scale compositional separation resulting from Al and Be.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Korea University, 1, Anam-dong 5-ga, Seongbuk-gu, 136-701, Seoul, Korea

    Kyou-Hyun Kim, Seok-Woo Lee & Jae-Chul Lee

  2. Advanced Analysis Center, Korea Institute of Science and Technology, 39-1, Hawolgok 2-dong, Seongbuk-gu, 130-650, Seoul, Korea

    Jae-Pyoung Ahn

  3. Advanced Metals Research Center, Korea Institute of Science and Technology, Korea

    Eric Fleury & Yu-Chan Kim

Authors
  1. Kyou-Hyun Kim
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  2. Seok-Woo Lee
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  3. Jae-Pyoung Ahn
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  4. Eric Fleury
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  5. Yu-Chan Kim
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  6. Jae-Chul Lee
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Correspondence to Jae-Chul Lee.

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Kim, KH., Lee, SW., Ahn, JP. et al. A Cu-based amorphous alloy with a simultaneous improvement in its glass forming ability and plasticity. Met. Mater. Int. 13, 21–24 (2007). https://doi.org/10.1007/BF03027818

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  • DOI: https://doi.org/10.1007/BF03027818

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