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Does an icosahedral short-range order prevail in glass-forming Zr-Cu melts?

2012; Institute of Physics; Volume: 100; Issue: 5 Linguagem: Inglês

10.1209/0295-5075/100/56002

1286-4854

D. Holland‐Moritz, Fan Yang, Tobias Kordel, Stefan Klein, Florian Kargl, J. Gegner, Thomas C. Hansen, Jozef Bednarčík, I. Kaban, O. Shuleshova, N. Mattern, Andreas Meyer,

Material Dynamics and Properties

We report on investigations of the static structure factors of glass-forming Zr-Cu alloy melts by combination of the containerless processing technique of electrostatic levitation with diffraction of neutron and synchrotron radiation. The partial Bhatia-Thornton structure factors SNN and SNC were determined from the two total structure factors. While it is widely assumed in literature that the good glass-forming ability of Zr-Cu is related to an icosahedral short-range order prevailing in the melt, our partial structure factors demonstrate that the liquid Zr-Cu is not characterized by a dominant icosahedral short-range order.