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Negative expansions of interatomic distances in metallic melts
Lou, HB; Wang, XD; Cao, QP; Zhang, DX; Zhang, J; Hu, TD; Mao, HK; Jiang, JZ;张静; Hu TD(胡天斗)
2013
发表期刊PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷号110期号:25页码:10068-10072
摘要When a material is heated, generally, it dilates. Here, we find a general trend that the average distance between a center atom and atoms in the first nearest-neighbor shell contracts for several metallic melts upon heating. Using synchrotron X-ray diffraction technique and molecular dynamics simulations, we elucidate that this anomaly is caused by the redistribution of polyhedral clusters affected by temperature. In metallic melts, the high-coordinated polyhedra are inclined to evolve into low-coordinated ones with increasing temperature. As the coordination number decreases, the average atomic distance between a center atom and atoms in the first shell of polyhedral clusters is reduced. This phenomenon is a ubiquitous feature for metallic melts consisting of various-sized polyhedra. This finding sheds light on the understanding of atomic structures and thermal behavior of disordered materials and will trigger more experimental and theoretical studies of liquids, amorphous alloys, glasses, and casting temperature effect on solidification process of crystalline materials.
关键词metal liquids bond lengths contraction
学科领域Science & Technology - Other Topics
DOI10.1073/pnas.1307967110
收录类别SCI
WOS记录号WOS:000321500200022
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被引频次:69[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224320
专题多学科研究中心
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GB/T 7714
Lou, HB,Wang, XD,Cao, QP,et al. Negative expansions of interatomic distances in metallic melts[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2013,110(25):10068-10072.
APA Lou, HB.,Wang, XD.,Cao, QP.,Zhang, DX.,Zhang, J.,...&胡天斗.(2013).Negative expansions of interatomic distances in metallic melts.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,110(25),10068-10072.
MLA Lou, HB,et al."Negative expansions of interatomic distances in metallic melts".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 110.25(2013):10068-10072.
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