The air oxidation of a nanocrystalline Cu-10 wt%Ni alloy at 800 degrees C

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	The air oxidation of a nanocrystalline Cu-10 wt%Ni alloy at 800 degrees C
	Y. Niu; F. Gesmundo; G. Farne; Y. S. Li; P. Matteazzi; G. Randi
	2000
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	42 期号:10 页码:1763-1777
摘要	The air oxidation of two copper-base Cu-Ni alloys having the same overall composition, but prepared by different methods and presenting widely different grain sizes, has been carried out at 800 degrees C to examine the effect of a large reduction in the grain size on the oxidation behavior of a solid-solution alloy. Both alloys formed an external scale of copper oxide (CuO+Cu2O) plus a region of internal oxidation of nickel. However, the overall oxidation rate of the alloy with a grain size in the nanometer range was faster and the depth of internal oxidation was larger than those measured for the conventional alloy under the same conditions. Moreover, the particles of nickel oxide (NiO) formed by internal oxidation were present only in the alloy-consumption region for the conventional alloy, while for the mechanical alloy they were distributed throughout the whole thickness of the external scale. These differences were attributed to a faster transport of oxygen in the alloy and of oxygen and copper in the scales for the fine-grained material resulting from a decrease of the grain size both in the alloy and in the scale and from a concomitant increase in the effective diffusion coefficients of the relevant species. (C) 2000 Elsevier Science Ltd, All rights reserved.
部门归属	univ genoa, dipartimento ingn chim & proc, i-16129 genoa, italy. inst met res, state key lab corros & protect, shenyang, peoples r china. univ udine, dipartimento sci & technol chim, i-33100 udine, italy.;gesmundo, f (reprint author), univ genoa, dipartimento ingn chim & proc, i-16129 genoa, italy
关键词	Copper Nickel Oxidation Mechanical Alloys High-temperature Oxidation Grain-boundary Diffusion Short-circuit Diffusion Nickel Crystal Faces 304 Stainless-steel Selective Oxidation Binary-alloys Thin-films Resistance Behavior
URL	查看原文
WOS记录号	WOS:000088893400006
引用统计	被引频次：14[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/321006/37140
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Niu,F. Gesmundo,G. Farne,et al. The air oxidation of a nanocrystalline Cu-10 wt%Ni alloy at 800 degrees C[J]. Corrosion Science,2000,42(10):1763-1777.
APA	Y. Niu,F. Gesmundo,G. Farne,Y. S. Li,P. Matteazzi,&G. Randi.(2000).The air oxidation of a nanocrystalline Cu-10 wt%Ni alloy at 800 degrees C.Corrosion Science,42(10),1763-1777.
MLA	Y. Niu,et al."The air oxidation of a nanocrystalline Cu-10 wt%Ni alloy at 800 degrees C".Corrosion Science 42.10(2000):1763-1777.