The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C

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	The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C; The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C; The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C
	Y. Niu; J. Song; F. Gesmundo; G. Farne; G. Fu; C. Zeng
	2000 ; 2000 ; 2000
发表期刊	Corrosion Science ; Corrosion Science ; Corrosion Science
ISSN	0010-938X ; 0010-938X ; 0010-938X
卷号	42 期号:5 页码:799-815
摘要	The oxidation of three two-phase cobalt-copper alloys containing approximately 25, 50 and 75 wt% Cu has been studied at 600-800 degrees C in air. The scaling kinetics follow only approximately the parabolic rate law, with rate constants increasing with the copper content under constant temperature. All the alloys form composite scales containing complex mixtures of copper and cobalt oxides, where copper concentrates preferentially in the external regions. Beneath the external oxide scales, there is, in most cases, a region where cobalt oxide is mixed with copper metal: for alloys containing up to 50 wt% copper this zone corresponds to internal oxidation of cobalt, while, for the alloy containing 25 wt% copper, it contains a dispersion of isolated copper particles in a cobalt oxide matrix. At variance with the behavior of solid-solution binary alloys, cobalt is not depeleted in the alloy beneath this region in spite of its preferential local oxidation. The peculiar structure of the scales formed on these alloys is interpreted by considering their two-phase nature. (C) 2000 Elsevier Science Ltd. All rights reserved.; The oxidation of three two-phase cobalt-copper alloys containing approximately 25, 50 and 75 wt% Cu has been studied at 600-800 degrees C in air. The scaling kinetics follow only approximately the parabolic rate law, with rate constants increasing with the copper content under constant temperature. All the alloys form composite scales containing complex mixtures of copper and cobalt oxides, where copper concentrates preferentially in the external regions. Beneath the external oxide scales, there is, in most cases, a region where cobalt oxide is mixed with copper metal: for alloys containing up to 50 wt% copper this zone corresponds to internal oxidation of cobalt, while, for the alloy containing 25 wt% copper, it contains a dispersion of isolated copper particles in a cobalt oxide matrix. At variance with the behavior of solid-solution binary alloys, cobalt is not depeleted in the alloy beneath this region in spite of its preferential local oxidation. The peculiar structure of the scales formed on these alloys is interpreted by considering their two-phase nature. (C) 2000 Elsevier Science Ltd. All rights reserved.; The oxidation of three two-phase cobalt-copper alloys containing approximately 25, 50 and 75 wt% Cu has been studied at 600-800 degrees C in air. The scaling kinetics follow only approximately the parabolic rate law, with rate constants increasing with the copper content under constant temperature. All the alloys form composite scales containing complex mixtures of copper and cobalt oxides, where copper concentrates preferentially in the external regions. Beneath the external oxide scales, there is, in most cases, a region where cobalt oxide is mixed with copper metal: for alloys containing up to 50 wt% copper this zone corresponds to internal oxidation of cobalt, while, for the alloy containing 25 wt% copper, it contains a dispersion of isolated copper particles in a cobalt oxide matrix. At variance with the behavior of solid-solution binary alloys, cobalt is not depeleted in the alloy beneath this region in spite of its preferential local oxidation. The peculiar structure of the scales formed on these alloys is interpreted by considering their two-phase nature. (C) 2000 Elsevier Science Ltd. All rights reserved.
部门归属	univ genoa, dipartimento ingn chim proc, i-16129 genoa, italy. cas, icpm, state key lab corros & protect, shenyang 10015, peoples r china.;gesmundo, f (reprint author), univ genoa, dipartimento ingn chim proc, i-16129 genoa, italy ; univ genoa, dipartimento ingn chim proc, i-16129 genoa, italy. cas, icpm, state key lab corros & protect, shenyang 10015, peoples r china.;gesmundo, f (reprint author), univ genoa, dipartimento ingn chim proc, i-16129 genoa, italy ; univ genoa, dipartimento ingn chim proc, i-16129 genoa, italy. cas, icpm, state key lab corros & protect, shenyang 10015, peoples r china.;gesmundo, f (reprint author), univ genoa, dipartimento ingn chim proc, i-16129 genoa, italy
关键词	Cobalt Cobalt Cobalt Copper Copper Copper Two-phase Alloys Two-phase Alloys Two-phase Alloys Oxidation Oxidation Oxidation 2-phase Binary-alloys 2-phase Binary-alloys 2-phase Binary-alloys High-temperature Oxidation High-temperature Oxidation High-temperature Oxidation Most-reactive Most-reactive Most-reactive Component Component Component High Oxidant Pressures High Oxidant Pressures High Oxidant Pressures Possible Scaling Modes Possible Scaling Modes Possible Scaling Modes Low-oxygen Low-oxygen Low-oxygen Pressures Pressures Pressures Internal Oxidation Internal Oxidation Internal Oxidation Stable Oxide Stable Oxide Stable Oxide Cr Alloys Cr Alloys Cr Alloys 700-900-degrees-c 700-900-degrees-c 700-900-degrees-c
URL	查看原文 ; 查看原文 ; 查看原文
WOS记录号	WOS:000086197100003 ; WOS:000086197100003 ; WOS:000086197100003
引用统计	被引频次：18[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/321006/37142
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Niu,J. Song,F. Gesmundo,et al. The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C, The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C, The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C[J]. Corrosion Science, Corrosion Science, Corrosion Science,2000, 2000, 2000,42, 42, 42(5):799-815, 799-815, 799-815.
APA	Y. Niu,J. Song,F. Gesmundo,G. Farne,G. Fu,&C. Zeng.(2000).The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C.Corrosion Science,42(5),799-815.
MLA	Y. Niu,et al."The air oxidation of two-phase Co-Cu alloys at 600-800 degrees C".Corrosion Science 42.5(2000):799-815.