Effect of La2O3 particles on microstructure and cracking-resistance of NiO scale on electrodeposited nickel films

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	Effect of La2O3 particles on microstructure and cracking-resistance of NiO scale on electrodeposited nickel films
	X. Peng; T. Li; W. Wu; W. P. Pan
	2001
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	298 期号:1-2 页码:100-109
摘要	The effect of La2O3 particles on the microstructure and cracking-resistance of thermally grown NiO scale, formed at 900 and 1000 degreesC, on electrodeposited nickel films has been investigated through in situ acoustic emission (AE) testing in conjunction with SEM and TEM/EDX. NiO scale, formed on electrodeposited films of pure nickel, has a porous duplex layered structure, which exhibits a more brittle behavior than the scale on films with the addition of La2O3. particles. They played a profound role in the procrastination of the occurrence of scale cracking and reduction of the cracking events. Upon the comparison of the microstructure: of NiO scale on the nickel film with the NiO scale on the LaO-containing film, several points can be concluded. For example, the stresses in NiO scale on the film with La2O3 were partly relaxed by a nondestructive route, such as scale plastic deformation due to La2O1-induced formation of a single-layered and fine-grained NiO scale. Also, it is believed that the particles reduced the size of the defects at the scale-metal interface and probably enhanced the cohesion between NiO grains and the adhesion between the scale-metal interface by retardation of the inward diffusion of nickel vacancies. (C) 2001 Elsevier Science B.V. All rights reserved.
部门归属	western kentucky univ, dept chem, ctr mat characterizat, bowling green, ky 42101 usa. chinese acad sci, met res inst, state key lab corros & protect met, shenyang 110015, peoples r china. chinese acad sci, inst met res, atom imaging solids lab, shenyang 110015, peoples r china.;peng, x (reprint author), western kentucky univ, dept chem, ctr mat characterizat, bowling green, ky 42101 usa
关键词	Oxidation Nio Scale Mechanical Behavior Crack La2o3 Electrodeposition Reactive Element Effect High-temperature Oxidation Acoustic-emission Technique Oxide Scales Reactive Elements Ni/nio System Behavior Growth Deformation Dispersions Adherence
URL	查看原文
WOS记录号	WOS:000166511200013
引用统计	被引频次：28[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/321006/36778
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. Peng,T. Li,W. Wu,et al. Effect of La2O3 particles on microstructure and cracking-resistance of NiO scale on electrodeposited nickel films[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2001,298(1-2):100-109.
APA	X. Peng,T. Li,W. Wu,&W. P. Pan.(2001).Effect of La2O3 particles on microstructure and cracking-resistance of NiO scale on electrodeposited nickel films.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,298(1-2),100-109.
MLA	X. Peng,et al."Effect of La2O3 particles on microstructure and cracking-resistance of NiO scale on electrodeposited nickel films".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 298.1-2(2001):100-109.