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Metals 2016, 6(10), 240;

Short-to-Medium-Range Order and Atomic Packing in Zr48Cu36Ag8Al8 Bulk Metallic Glass

School of Materials Science and Engineering, Shandong Jianzhu University, Jinan 250101, China
School of Materials Science and Engineering, Shandong University, Jinan 250061, China
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
Authors to whom correspondence should be addressed.
Academic Editor: Jordi Sort Viñas
Received: 13 May 2016 / Revised: 19 September 2016 / Accepted: 19 September 2016 / Published: 12 October 2016
(This article belongs to the Special Issue Amorphous Alloys and Related Transitions)
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Due to its excellent glass-forming ability (GFA), the Zr48Cu36Al8Ag8 bulk metallic glass (BMG) is of great importance in glass transition investigations and new materials development. However, due to the lack of detailed structural information, the local structure and atomic packing of this alloy is still unknown. In this work, synchrotron measurement and reverse Monte Carlo simulation are performed on the atomic configuration of a Zr-based bulk metallic glass. The local structure is characterized in terms of bond pairs and Voronoi tessellation. It is found that there are mainly two types of bond pairs in the configuration, as the body-centered cubic (bcc)-type and icosahedral (ico)-type bond pairs. On the other hand, the main polyhedra in the configuration are icosahedra and the bcc structure. That is, the bcc-type bond pairs, together with the ico-type bond pairs, form the bcc polyhedra, introducing the distortion in bcc clusters in short range. However, in the medium range, the atoms formed linear or planar structures, other than the tridimensional clusters. That is, the medium-range order in glass is of 1D or 2D structure, suggesting the imperfect ordered packing feature. View Full-Text
Keywords: metallic glass; local structure; short range order; medium range order metallic glass; local structure; short range order; medium range order

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Xu, Y.; Yu, M.; Xu, R.; Wang, X.; Wang, Z.; Liang, Y.; Lin, J. Short-to-Medium-Range Order and Atomic Packing in Zr48Cu36Ag8Al8 Bulk Metallic Glass. Metals 2016, 6, 240.

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