Elucidating the nature of crystallization kinetics in Zr46Cu46Al8 metallic glass through simultaneous WAXS/SAXS measurements

Xuelian Wu; Si Lan; Xiaoya Wei; Jie Zhou; Zhaoping Lu; Jonathan D. Almer; Xun-Li Wang

doi:10.1063/1.5088984

Elucidating the nature of crystallization kinetics in Zr₄₆Cu₄₆Al₈ metallic glass through simultaneous WAXS/SAXS measurements

Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review

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Author(s)

Si Lan
Jie Zhou
Zhaoping Lu
Jonathan D. Almer

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Detail(s)

Original language	English
Article number	211903
Journal / Publication	Applied Physics Letters
Volume	114
Issue number	21
Publication status	Published - 27 May 2019

Link(s)

DOI	DOI https://doi.org/10.1063/1.5088984 Final Published version
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Attachment(s)	Documents 32312237.pdf Final Published version, 1.58 MB, PDF Publisher's Copyright Statement This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Xuelian Wu, Si Lan, Xiaoya Wei, Jie Zhou, Zhaoping Lu, Jonathan D. Almer, and Xun-Li Wang, "Elucidating the nature of crystallization kinetics in Zr46Cu46Al8 metallic glass through simultaneous WAXS/SAXS measurements", Appl. Phys. Lett. 114, 211903 (2019) and may be found at https://doi.org/10.1063/1.5088984.
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85066815323&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(706161e9-6c66-49aa-9444-6732bb712368).html

Abstract

Simultaneous wide- and small-angle X-ray scattering (WAXS/SAXS) measurements were performed to investigate the low-temperature crystallization kinetics of Zr₄₆Cu₄₆Al₈ bulk metallic glass during isothermal annealing. Quantitative analysis of the WAXS intensity data indicated that the crystallization process was dominated by steady-state homogeneous nucleation and three-dimensional diffusion-controlled growth. This observation was corroborated by quantitative analysis of the SAXS data showing a saturation of the growth of nanoscale crystallites. Comparison of simultaneously measured WAXS and SAXS data showed evidence of composition fluctuation prior to crystallization, suggesting that the crystallization was facilitated by nanoscale phase separation which established regions of favorable compositions catalyzing crystallization. The temperature dependence of crystallization mechanisms and the resulting microstructures in metallic glass are discussed.