Superheating and melting behaviors of Ag clusters with Ni coating studied by molecular dynamics and experiments

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	Superheating and melting behaviors of Ag clusters with Ni coating studied by molecular dynamics and experiments
	F. T. Xu; J. Zhong; Z. H. Jin; K. Lu
	2001
发表期刊	Science in China Series E-Technological Sciences
ISSN	1006-9321
卷号	44 期号:4 页码:432-440
摘要	Using molecular dynamics with embedded-atom-type interatomic potentials, we simulated the melting behavior of a spherical Ag-3055 cluster coated with Ni. The semi-coherent Ag/Ni interface formed at low temperatures acts as an effective barrier against the surface melting and leads to a substantial superheating of the Ag cluster. The melting point was found to be about 100 K above the equilibrium melting point of the bulk Ag crystal (1230 K +/- 15 K) and about 290 K above that (1040 K) of the free Ag3055 cluster. A superheating of 70 K was observed in the high-temperature differential scanning calorimetry measurement for Ag particles with a mean size of 30 nm embedded in Ni matrix prepared by means of melt-spinning. Melting is initiated locally at the defective interfacial area and then propagates inwards, suggesting a heterogeneously nucleated melting event at the Ag/Ni interface.
部门归属	chinese acad sci, inst met res, state key lab rapidly solidified nonequilibrium a, shenyang 110016, peoples r china.;lu, k (reprint author), chinese acad sci, inst met res, state key lab rapidly solidified nonequilibrium a, shenyang 110016, peoples r china, peoples r china
关键词	Superheating And Melting Semi-coherent Interface Heterogeneous Nucleation Theory For Melting Molecular Dynamics High-temperature Dsc Surface Metals Alloys Model
URL	查看原文
WOS记录号	WOS:000172131700013
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36855
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. T. Xu,J. Zhong,Z. H. Jin,et al. Superheating and melting behaviors of Ag clusters with Ni coating studied by molecular dynamics and experiments[J]. Science in China Series E-Technological Sciences,2001,44(4):432-440.
APA	F. T. Xu,J. Zhong,Z. H. Jin,&K. Lu.(2001).Superheating and melting behaviors of Ag clusters with Ni coating studied by molecular dynamics and experiments.Science in China Series E-Technological Sciences,44(4),432-440.
MLA	F. T. Xu,et al."Superheating and melting behaviors of Ag clusters with Ni coating studied by molecular dynamics and experiments".Science in China Series E-Technological Sciences 44.4(2001):432-440.