Oxidation of the three-phase Cu-20Ni-30Cr and Cu-20Ni-40Cr alloys at 700-800 degrees C in 1 atm O-2

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	Oxidation of the three-phase Cu-20Ni-30Cr and Cu-20Ni-40Cr alloys at 700-800 degrees C in 1 atm O-2
	X. J. Zhang; Y. Niu; F. Gesmundo
	2004
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	46 期号:11 页码:2837-2851
摘要	The oxidation of two ternary Cu-Ni-Cr alloys containing approximately 30 and 40 at.% Cr, but with a similar Ni content, was studied at 700-800 degreesC in 1 atm of pure oxygen. Both alloys contain a mixture of three phases, where the phase with the largest copper and lowest chromium content (a) forms the matrix, while the phase with an intermediate content of Ni and Cr (P) and that richest in chromium (gamma) are present in the form of particles dispersed in the alpha matrix. The kinetics of oxidation were rather irregular and presented two approximately parabolic stages which for the alloy with 40 at.% Cr were followed by a final nearly linear stage. Generally, the corrosion rates decreased by increasing the chromium content in the alloy under constant temperature and increased with temperature for a constant alloy composition. The scales formed on the two alloys were rather complex and consisted in most cases of an outermost copper oxide layer followed by a layer containing a mixture of oxides of nickel and copper as well as Cu-Cr and Ni-Cr spinel and finally by an innermost very irregular and convoluted but continuous Cr2O3 layer which protruded into the alloy and contained a number of Cu-rich metal islands. (C) 2004 Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. shenyang inst chem technol, shenyang 110142, peoples r china. univ genoa, dichep, i-16129 genoa, italy.;niu, y (reprint author), chinese acad sci, inst met res, state key lab corros & protect, wencui rd 62, shenyang 110016, peoples r china;yniu@icpm.syb.ac.cn
关键词	Cu-ni-cr Ternary Alloys Three-phase Oxidation High Temperature Most-reactive Component 2-phase Binary-alloys Air Oxidation 600-800-degrees-c Corrosion 700-900-degrees-c Pressures
URL	查看原文
WOS记录号	WOS:000224789300016
引用统计	被引频次：8[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/321006/35729
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. J. Zhang,Y. Niu,F. Gesmundo. Oxidation of the three-phase Cu-20Ni-30Cr and Cu-20Ni-40Cr alloys at 700-800 degrees C in 1 atm O-2[J]. Corrosion Science,2004,46(11):2837-2851.
APA	X. J. Zhang,Y. Niu,&F. Gesmundo.(2004).Oxidation of the three-phase Cu-20Ni-30Cr and Cu-20Ni-40Cr alloys at 700-800 degrees C in 1 atm O-2.Corrosion Science,46(11),2837-2851.
MLA	X. J. Zhang,et al."Oxidation of the three-phase Cu-20Ni-30Cr and Cu-20Ni-40Cr alloys at 700-800 degrees C in 1 atm O-2".Corrosion Science 46.11(2004):2837-2851.