Comparison of the oxidation behavior of nanocrystalline and coarse-grain copper

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	Comparison of the oxidation behavior of nanocrystalline and coarse-grain copper
	Z. Han; L. Lu; H. W. Zhang; Z. Q. Yang; F. H. Wang; K. Lu
	2005
发表期刊	Oxidation of Metals
ISSN	0030-770X
卷号	63 期号:5-6 页码:261-275
摘要	The Oxidation of an electro-deposited nanocrystalline Cu (nc Cu) and a conventional coarse-grain Cu (cg Cu) was investigated at 30-800 degrees C under 1 atm of oxygen. Both Cu samples formed external scales of copper oxide (Cu2O+CuO). At the lower temperature (30-300 degrees C) the very slow oxidation rates of both the nc and cg Cu might be attributed to the formation of a protective Cu2O surface layer. However at the higher temperature (300-700 degrees C), oxidation rates of the nc Cu were obviously faster than those of the cg Cu, which was attributed to faster diffusion of various species along grain boundaries both in the metal and in the scale. In particular, the scale grew faster on the nc Cu by means of not only rapid external oxidation as a result of outward diffusion of Cu-ions but also a significant contribution from inward diffusion of oxygen along the grain boundaries in the scales. Compared with the cg Cu, dissolved O-2 in the nc Cu may have a certain effect on the faster oxidation of the nc Cu. Above 700 degrees C, the difference seemed to disappear as a result of the ineffectiveness of grain-boundary diffusion.
部门归属	chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;han, z (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;zhonghan@imr.ac.cn
关键词	Copper Oxidation Nanocrystalline Electro-deposition Grain Boundaries Stainless-steel Diffusion Alloy Temperature Boundaries Resistance Defects Growth Oxides Scales
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WOS记录号	WOS:000229508800001
引用统计	被引频次：42[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/321006/34861
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Han,L. Lu,H. W. Zhang,et al. Comparison of the oxidation behavior of nanocrystalline and coarse-grain copper[J]. Oxidation of Metals,2005,63(5-6):261-275.
APA	Z. Han,L. Lu,H. W. Zhang,Z. Q. Yang,F. H. Wang,&K. Lu.(2005).Comparison of the oxidation behavior of nanocrystalline and coarse-grain copper.Oxidation of Metals,63(5-6),261-275.
MLA	Z. Han,et al."Comparison of the oxidation behavior of nanocrystalline and coarse-grain copper".Oxidation of Metals 63.5-6(2005):261-275.