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- W2276196268 abstract "Comparative analysis between Zr-rich Zr50Cu45Al5 and Cu-rich Cu50Zr45Al5 metallic glasses (MGs) is extensively performed to locate the key structural motifs accounting for their difference of glass forming ability. Here we adopt ab initio molecular dynamics simulations to investigate the local atomic structures of Zr50Cu45Al5 and Cu50Zr45Al5 MGs. A high content of icosahedral-related (full and distorted) orders was found in both samples, while in the Zr-rich MG full icosahedrons ⟨0, 0, 12, 0⟩ is dominant, and in the Cu-rich one the distorted icosahedral orders, especially ⟨0, 2, 8, 2⟩ and ⟨0, 2, 8, 1⟩, are prominent. And the ⟨0, 2, 8, 2⟩ polyhedra in Cu50Zr45Al5 MG mainly originate from Al-centered clusters, while the ⟨0, 0, 12, 0⟩ in Zr50Cu45Al5 derives from both Cu-centered clusters and Al-centered clusters. These difference may be ascribed to the atomic size difference and chemical property between Cu and Zr atoms. The relatively large size of Zr and large negative heat of mixing between Zr and Al atoms, enhancing the packing density and stability of metallic glass system, may be responsible for the higher glass forming ability of Zr50Cu45Al5." @default.
- W2276196268 created "2016-06-24" @default.
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- W2276196268 date "2016-02-01" @default.
- W2276196268 modified "2023-10-16" @default.
- W2276196268 title "<i>Ab initio</i>molecular dynamics simulations of short-range order in Zr<sub>50</sub>Cu<sub>45</sub>Al<sub>5</sub>and Cu<sub>50</sub>Zr<sub>45</sub>Al<sub>5</sub>metallic glasses" @default.
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- W2276196268 doi "https://doi.org/10.1088/0953-8984/28/8/085102" @default.
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