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Design of a bulk amorphous alloy containing Cu–Zr with simultaneous improvement in glass-forming ability and plasticity

  • Seok-Woo Lee (a1), Sang-Chul Lee (a1), Yu-Chan Kim (a2), E. Fleury (a2) and Jae-Chul Lee (a1)...

Abstract

We synthesized bulk amorphous alloy systems of Cu43Zr43Al7X7 (X = Be, Ag; numbers indicate at.%), with the objective of simultaneously enhancing the glass-forming ability (GFA) and the plasticity. The alloys not only exhibit high plasticity (∼7%, ∼8%), but also possess enhanced GFA (alloys with 12 and 8 mm diameter). The possible mechanisms underlying this enhanced GFA and plasticity exhibited by these alloys are discussed based on the atomic-packing state and atomistic-scale compositional separation associated with the mixing enthalpy difference. A strategy for designing bulk amorphous alloys with simultaneous improvement in the GFA and the plasticity is proposed from the viewpoint of atomic-packing state and atomistic-scale phase separation.

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a) Address all correspondence to this author. e-mail: jclee001@korea.ac.kr

References

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Keywords

Design of a bulk amorphous alloy containing Cu–Zr with simultaneous improvement in glass-forming ability and plasticity

  • Seok-Woo Lee (a1), Sang-Chul Lee (a1), Yu-Chan Kim (a2), E. Fleury (a2) and Jae-Chul Lee (a1)...

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