Investigation on the atomic structural evolution of as-prepared and annealed ZrCuAl metallic glasses

Abstract

Atomic structures of the Zr48Cu45Al7 as-prepared and annealed metallic glasses (MGs) were investigated by performing the reverse Monte Carlo simulation on the synchrotron radiation-based experiments. It was found that although the annealed sample remains completely amorphous, the volumes of the Al-centered clusters evidently expand, which is attributed to the relatively longer Al–Zr bonds. As a result, the role of Al atoms as the glue atoms to connect and fix the Zr- and Cu-centered large clusters is accordingly weakened, which leads to the ease of the rearrangement of atoms and clusters in the glass state. This study provides an insight into the microstructures of MGs, which extends understanding of the structural evolution in the glass alloys during annealing prior to the precipitation of nanocrystals.

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ACKNOWLEDGMENTS

The authors thank the HASYLAB in Germany and the Shanghai Synchrotron Radiation Facility in China for the use of the advanced synchrotron radiation facilities. Financial supports from the National Natural Science Foundation of China (Grant No. 10805027), the Natural Science Foundation of Jiangsu Province (Grant No. BK2011071), and the NUAA Research Funding (Grant No. NS2010168) are gratefully acknowledged.

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Correspondence to Liang Yang.

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Yang, L., Huang, CL. & Guo, GQ. Investigation on the atomic structural evolution of as-prepared and annealed ZrCuAl metallic glasses. Journal of Materials Research 27, 1164–1168 (2012). https://doi.org/10.1557/jmr.2012.14

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