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Enhancement of glass-forming ability and plasticity of Cu-rich Cu-Zr-Al bulk metallic glasses by minor addition of Dy

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Abstract

(Cu0.47Zr0.45Al0.08)100-x Dyx (x = 0, 1, 2, 3, 4; at.%) metallic glasses with greatly enhanced glass-forming ability (GFA) and plasticity were synthesized based on microalloying technique. The structure, thermal stability, and elastic properties of the BMG samples were studied by x-ray diffraction (XRD), differential scanning calorimetry (DSC), and ultrasonic measurements, respectively. With addition of minor dysprosium (Dy), fully metallic glassy rods with diameters exceeding 20 mm could be successfully fabricated by copper mold casting. In addition, the Cu-Zr-Al-Dy BMGs exhibit good mechanical properties under a compressive deformation mode, i.e., high yield strength of 1735–1906 MPa, Young’s modulus of 85–100 GPa, and distinct plastic strain up to 4.02%. The strength and plasticity show remarkable correlations with glass transition temperature and Poisson’s ratio, respectively. The role of minor Dy addition in enhancement in GFA and mechanical property of the Cu-rich BMGs is also discussed.

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ACKNOWLEDGMENTS

This research is financially supported by the National Natural Science Foundation of China (Grant No. 51301029 and 51375071).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, People’s Republic of China

    B. W. Zhou, L. Deng, X. G. Zhang & W. Zhang

  2. Institute of Materials Research, Tohoku University, Sendai, 980-8577, Japan

    H. Kimura & A. Makino

Authors
  1. B. W. Zhou
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  2. L. Deng
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  3. X. G. Zhang
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  4. W. Zhang
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  5. H. Kimura
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  6. A. Makino
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Correspondence to X. G. Zhang.

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Zhou, B.W., Deng, L., Zhang, X.G. et al. Enhancement of glass-forming ability and plasticity of Cu-rich Cu-Zr-Al bulk metallic glasses by minor addition of Dy. Journal of Materials Research 29, 1362–1368 (2014). https://doi.org/10.1557/jmr.2014.132

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  • DOI: https://doi.org/10.1557/jmr.2014.132

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