In situ TEM observations on morphological instability of ultrathin Pb films

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	In situ TEM observations on morphological instability of ultrathin Pb films
	L. H. Zhang; M. L. Sui; L. Zhang; K. Y. Hu; D. X. Li
	2004
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	379 期号:1-2 页码:40914
摘要	An ultrathin bilayer Pb-Al film was made by cold rolling and ion beam thinning techniques. Morphological instability of the Pb layer under electron beam irradiation was investigated by means of in situ transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). Morphological instability of the Pb layer was characterized by spheroidization of Pb film and coalescence of Pb particles. Under electron beam irradiation, the ultrathin Pb layer with an incoherent Pb-Al interface was unstable and sphericized into Pb particles with an initial size about 3 nm. The Pb particles were mobile on the Al substrate and the coalescence of Pb particles took place. The Pb particles grew up only in the way of coalescence and the mobility of the particles decreased with the particle size increasing. The growth rates of Pb particles in different stages of coalescence were measured, respectively. The mechanism of spheroidization and coalescence was discussed. Driving forces for the spheroidization and the coalescence were attributed to minimizing the total energy. The intensive motion of the surface atoms for the Pb films and particles under irradiation activated the morphological instability of the system. (C) 2004 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, shenyang natl lab mat sci, met res inst, shenyang 110016, peoples r china.;zhang, lh (reprint author), chinese acad sci, shenyang natl lab mat sci, met res inst, shenyang 110016, peoples r china;lzhang2@lbl.gov
关键词	Thin Film Morphological Instability Spheroidization Coalescence Electron Beam Irradiation Metals
URL	查看原文
WOS记录号	WOS:000223330100001
引用统计	被引频次：3[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/321006/35715
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. H. Zhang,M. L. Sui,L. Zhang,et al. In situ TEM observations on morphological instability of ultrathin Pb films[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2004,379(1-2):40914.
APA	L. H. Zhang,M. L. Sui,L. Zhang,K. Y. Hu,&D. X. Li.(2004).In situ TEM observations on morphological instability of ultrathin Pb films.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,379(1-2),40914.
MLA	L. H. Zhang,et al."In situ TEM observations on morphological instability of ultrathin Pb films".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 379.1-2(2004):40914.