Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/42929
Title: Fractal growth of the dense-packing phase in annealed metallic glass imaged by high-resolution atomic force microscopy
Authors: Yang, Y
Zeng, ZF
Liu, CT
Volland, A
Blandin, JJ
Gravier, S
Keywords: Metallic glasses
Annealing
Structural relaxation
Atomic order
Fractal
Issue Date: 2012
Publisher: Pergamon Press
Source: Acta materialia, 2012, v. 60, no. 13-14, p. 5260-5272 How to cite?
Journal: Acta materialia 
Abstract: Unlike crystalline metals, which have a well-understood periodical structure, the amorphous structure of metallic glasses (MGs) is still poorly understood, particularly when such a structure rearranges itself at the nanoscale under external agitations. In this article, we provide compelling evidence obtained from a recently developed high-resolution atomic force microscopy (HRAFM) technique that reveals the nanoscale structural heterogeneity after thermal annealing in a Zr–Ni metallic glass. Through the HRAFM technique, we are able to uncover the annealing-induced fractal growth of the dense-packing phases in the binary MG thin film, which exhibits a fractal dimension of ∼1.7, in line with a two-dimensional diffusion limited aggregation process. The current findings not only reveal the evolution process of atomic packing in the annealed MG thin film, but also shed light on the possible cooling rate effect on the atomic structure of MGs.
URI: http://hdl.handle.net/10397/42929
ISSN: 1359-6454
DOI: 10.1016/j.actamat.2012.06.025
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