Oxidation of a three-phase Cu-45Ni-30Cr alloy at 700-800 degrees C under 1 atm O-2

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	Oxidation of a three-phase Cu-45Ni-30Cr alloy at 700-800 degrees C under 1 atm O-2
	Z. Q. Cao; F. Gesmundo; M. Al-Omary; Y. Niu
	2002
发表期刊	Oxidation of Metals
ISSN	0030-770X
卷号	57 期号:5-6 页码:395-407
摘要	The oxidation of a ternary Cu-Ni-Cr alloy containing approximately 45 wt.% Ni and 30 wt.% Cr has been studied in 1 atm O-2 at 700-800degreesC. The alloy contains a mixture of three phases: the one with the largest copper and lowest chromium content forms the matrix, the one with an intermediate chromium content has a rather large volume fraction and forms large islands, while the phase richest in chromium forms isolated particles dispersed in the other two phases. At variance with another Cu-Ni-Cr ternary three-phase alloy containing only 20 wt.% Cr and 20 wt.% Ni, which formed complex scales containing mixtures of the oxides of the various components and double oxides, plus an irregular region composed of a mixture of alloy and oxides, the present alloy is able to form protective, external chromia scales. A similar result could be obtained with alloys containing about 20 wt.% Cr, but composed of either a single phase (Cu-60Ni-20Cr) or of a mixture of two phases (Cu-40Ni-20Cr). The need for a larger chromium content for producing chromia scales for three-phase as compared to two-phase Cu-Ni-Cr alloys is attributed to the limitations of the diffusion of the alloy components in the metal substrate imposed by their multiphase nature.
部门归属	univ genoa, dichep, i-16129 genoa, italy. inst met sci & technol, state key lab corros & protect, shenyang 110016, peoples r china. univ sharjah, dept basic sci, sharjah, u arab emirates.;niu, y (reprint author), univ genoa, dichep, i-16129 genoa, italy
关键词	Cu-ni-cr Multiphase Alloy High Temperatures Oxidation 2-phase Binary-alloys Low-oxygen Pressures High-temperature Oxidation Most-reactive Component Possible Scaling Modes High Oxidant Pressures Cu-cr Alloys Air Oxidation Internal Oxidation Stable Oxide
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WOS记录号	WOS:000175450600002
引用统计	被引频次：10[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/321006/36234
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Q. Cao,F. Gesmundo,M. Al-Omary,et al. Oxidation of a three-phase Cu-45Ni-30Cr alloy at 700-800 degrees C under 1 atm O-2[J]. Oxidation of Metals,2002,57(5-6):395-407.
APA	Z. Q. Cao,F. Gesmundo,M. Al-Omary,&Y. Niu.(2002).Oxidation of a three-phase Cu-45Ni-30Cr alloy at 700-800 degrees C under 1 atm O-2.Oxidation of Metals,57(5-6),395-407.
MLA	Z. Q. Cao,et al."Oxidation of a three-phase Cu-45Ni-30Cr alloy at 700-800 degrees C under 1 atm O-2".Oxidation of Metals 57.5-6(2002):395-407.