Journal
INTERMETALLICS
Volume 14, Issue 8-9, Pages 893-897Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2006.01.006
Keywords
glasses; metallic; rapid solidification processing; simulations; Monte Carlo; diffraction
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The structures of Cu-Zr and Ni-Zr metallic glasses have been studied by neutron diffraction and Reverse Monte Carlo (RMC) modeling. A pre-peak at Q similar to 17 nm(-1) was observed in the structure factor, S(Q), of Ni-Zr metallic glasses, and this is associated with the Ni-Ni partial structure factor was well reproduced by the RMC modeling. An analysis of Voronoi polyhedra in the RMC simulations was used to characterise the different atomic configurations around Zr, Ni and Cu atoms. The Zr environments are very similar in the two systems, but there are marked differences between the polyhedra around Ni and Cu atoms. The polyhedra around Ni atoms are dominated by trigonal prismatic-like, Archimedian antiprismatic-like, and similar polyhedra, with smaller total coordination numbers less than 10. In contrast, icosahedron-like polyhedra with total coordination numbers in excess of 1 I are preferred for Cu. (c) 2006 Elsevier Ltd. All rights reserved.
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