摘要
Atomic packing is still a mystery for topologically disordered amorphous solids owing primarily to the absence of Bragg diffraction in this class of materials. Among many hypotheses, fractal packing is suggested based on a scaling relation with '2.5 power law' found in multicomponent metallic glasses. Here we examine the atomic packing critically in a pure Tantalum metallic glass under hydrostatic pressure. Without complications of chemical compositions as in the multicomponent systems, the genuine amorphous structure along in the single component metallic glass exhibits a cubic scaling exponent that indicates absence of the 2.5 power law. However, fractal-like short- and medium-range icosahedral cluster packing is observed; but these substructures do not contribute to the fractal dimension through the power law scaling.
源语言 | 英语 |
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文章编号 | 255402 |
期刊 | Journal of Physics Condensed Matter |
卷 | 30 |
期 | 25 |
DOI | |
出版状态 | 已出版 - 29 5月 2018 |