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Ni-Nb-Ta bulk metallic glasses designed by a cluster-plus-glue atom model

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Abstract

The formation of Ni-based ternary Ni-Nb-Ta bulk metallic glasses (BMGs) is explored in this work. Alloy compositions are designed by the cluster-plus-glue atom model based on a eutectic-related binary cluster Ni-Ni6Nb6, which is derived from the binary eutectic crystalline phase NiNb (Fe7W6 type). According to the cluster-plus-glue atom model, the well-known binary BMG-forming composition Ni62Nb38 can be described by a composition formula [Ni-Ni6Nb6]Ni3 = Ni62.5Nb37.5. With an aim to further improve the glass-forming ability of the Ni-Nb alloy, Ta is selected as an alloying addition to partially replace Nb in the [Ni-Ni6Nb6]Ni3 composition formula. The experimental results verified that BMGs with a critical size of 3 mm can be achieved at compositions [Ni-Ni6Nb6−xTax]Ni3 (x = 0.9 ∼ 1.1). Thermal and mechanical properties of the obtained BMG alloys are also investigated.

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Correspondence to J. B. Qiang.

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Yuan, L., Qiang, J.B., Pang, C. et al. Ni-Nb-Ta bulk metallic glasses designed by a cluster-plus-glue atom model. Trans Indian Inst Met 64, 293–295 (2011). https://doi.org/10.1007/s12666-011-0059-8

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  • DOI: https://doi.org/10.1007/s12666-011-0059-8

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