期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 352, 期 50-51, 页码 5318-5324出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jnoncrysol.2006.08.009
关键词
quasicrystals; medium-range order
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.
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