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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >A case for local icosahedral order in undercooled metallic liquids and the influence on the nucleation barrier
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A case for local icosahedral order in undercooled metallic liquids and the influence on the nucleation barrier

机译：过冷金属液体中局部二十面体有序的情况及其对成核屏障的影响

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摘要

An overview of recent experimental and theoretical investigations on undercooled liquids is given, indicating developing short-range order with undercooling. Our in situ synchrotron X-ray diffraction studies of electrostatically levitated droplets of elemental Ti, Zr, and Ni liquids and coordinated undercooling and structural studies of a Ti-Zr-Ni liquid that forms an icosahedral quasicrystal are discussed in the context of these investigations. lcosahedral order is demonstrated to be a dominant component to the structures of all undercooled liquids studied, although it becomes significantly distorted with an increasing importance of the d-band bonding character. The liquid short-range order couples with the nucleation barrier, as predicted by Frank over a half-century ago. (c) 2006 Elsevier B.V. All rights reserved.
机译：给出了对过冷液体的最新实验和理论研究的概述，表明随着过冷的发展短程有序。在这些研究的背景下，我们对元素Ti，Zr和Ni液体的静电悬浮液滴的原位同步X射线衍射研究以及形成二十面体准晶体的Ti-Zr-Ni液体的过冷和结构研究进行了讨论。二十面体阶被证明是所研究的所有过冷液体结构的主要组成部分，尽管随着d波段键合特性的重要性日益明显地扭曲。液体近程有序与成核屏障相结合，正如半个世纪前的弗兰克所预言的那样。 （c）2006 Elsevier B.V.保留所有权利。

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