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Formation and properties of new Cu-based bulk glassy alloys with critical diameters up to 1.5 cm

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Abstract

New Cu-based bulk glassy alloys (BGAs) with high glass-forming ability (GFA) were synthesized in a Cu-Zr-Al-Ag system. As the compositions of Cu-Zr-Al-Ag alloys with lower Ag and Al content shifted to the Cu-rich range, the supercooled liquid region, reduced glass transition temperature, and γ value increased, leading to the improvement of GFA. The best GFA is located around Cu47Zr45Al5Ag3, which is close to eutectic. Fully glassy samples with diameters up to 15 mm were fabricated by copper mold casting. These Cu-based BGAs exhibit excellent mechanical properties under compression. A large Young’s modulus of 104–111 GPa, high fracture strength of 1905–1942 MPa, and distinct plastic strain of 0.002–0.011 were obtained. Additionally, the BGAs also show good corrosion resistance in 1 N H2SO4 solution.

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Authors and Affiliations

  1. Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan

    Wei Zhang

  2. WPI, Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan

    Qingsheng Zhang, Chunling Qin & Akihisa Inoue

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  1. Wei Zhang
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  2. Qingsheng Zhang
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  3. Chunling Qin
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  4. Akihisa Inoue
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Correspondence to Wei Zhang.

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Zhang, W., Zhang, Q., Qin, C. et al. Formation and properties of new Cu-based bulk glassy alloys with critical diameters up to 1.5 cm. Journal of Materials Research 24, 2935–2940 (2009). https://doi.org/10.1557/jmr.2009.0344

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  • DOI: https://doi.org/10.1557/jmr.2009.0344

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