Abstract
The atomic structure of Cu 35Zr 65, Cu 50Zr 50, and Cu 65Zr 35 (at.%) metallic glasses was investigated by means of high-energy X-ray diffraction, neutron diffraction and extended X-ray absorption fine structure spectroscopy. Three-dimensional structure models were developed by applying the reverse Monte-Carlo method and analyzed in terms of the local atomic arrangements. The geometric short-range order of Cu–Zr glasses is characterized by a variety of polyhedra. The atomic sites of the nearest neighbourhood around a Cu or Zr atom are statistically occupied by Cu or Zr atoms. The composition dependence of the short- and the medium-range order in the Cu–Zr glasses points to a statistical replacement of Cu and Zr atoms in the whole composition range. No indications were observed for the existence of a dominant structural arrangement in the Cu–Zr glasses.
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