Superheating and melting-point depression of Pb nanoparticles embedded in Al matrices

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	Superheating and melting-point depression of Pb nanoparticles embedded in Al matrices
	H. W. Sheng; G. Ren; L. M. Peng; Z. Q. Hu; K. Lu
	1996
发表期刊	Philosophical Magazine Letters
ISSN	0950-0839
卷号	73 期号:4 页码:179-186
摘要	Two kinds of Pb-Al granular sample (with nanometre-sized Pb particles embedded in an Al matrix) were prepared by using melt-spinning and ball-milling techniques. The Pb particles were synthesized with similar particle sizes, about 5-30 nm in diameter, but were observed to have different Pb-Al interfaces for samples prepared using different approaches. In the melt-spun Pb-Al samples, the Pb nanoparticles were seen to have an epitaxial relationship with the Al matrix, while the Pb particles in the ball-milled sample were seen to be randomly oriented with respect to the Al matrix. The melting behaviour of the Pb particles was investigated by differential scanning calorimetry. It was found that the faceted Pb nanoparticles in the melt-spun sample could be superheated by about 11-40 K, whereas the irregularly shaped Pb particles in the ball-milled sample melted about 13 K below its equilibrium point. We suggest that different interface structures, which cause variations in energy differences between solid-Pb-solid-Al and liquid-Pb-solid-Al interfaces, are responsible for the different melting behaviour of Pb nanoparticles.
部门归属	chinese acad sci,beijing lab electron microscopy,beijing 100080,peoples r china. chinese acad sci,inst met res,int ctr mat phys,shenyang 110015,peoples r china.;sheng, hw (reprint author), chinese acad sci,inst met res,natl key lab rsa,shenyang 110015,peoples r china
关键词	Particles Temperature Surface Metals
URL	查看原文
WOS记录号	WOS:A1996UH07800004
引用统计	被引频次：152[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/321006/38388
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	H. W. Sheng,G. Ren,L. M. Peng,et al. Superheating and melting-point depression of Pb nanoparticles embedded in Al matrices[J]. Philosophical Magazine Letters,1996,73(4):179-186.
APA	H. W. Sheng,G. Ren,L. M. Peng,Z. Q. Hu,&K. Lu.(1996).Superheating and melting-point depression of Pb nanoparticles embedded in Al matrices.Philosophical Magazine Letters,73(4),179-186.
MLA	H. W. Sheng,et al."Superheating and melting-point depression of Pb nanoparticles embedded in Al matrices".Philosophical Magazine Letters 73.4(1996):179-186.