The third-element effect in the oxidation of Ni-xCr-7Al (x=0, 5, 10 15 at.%) alloys in 1 atm O-2 at 900-1000 degrees C

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	The third-element effect in the oxidation of Ni-xCr-7Al (x=0, 5, 10 15 at.%) alloys in 1 atm O-2 at 900-1000 degrees C
	Y. Niu; X. J. Zhang; Y. Wu; F. Gesmundo
	2006
发表期刊	Corrosion Science
ISSN	0010-938X
卷号	48 期号:12 页码:4020-4036
摘要	The oxidation in 1 atm of pure oxygen of Ni-Cr-Al alloys with a constant aluminum content of 7 at.% and containing 5, 10 and 15 at.% Cr was studied at 900 and 1000 degrees C and compared to the behavior of the corresponding binary Ni Al alloy (Ni-7Al). A dense external scale of NiO overlying a zone of internal oxide precipitates formed on Ni-7Al and Ni-5Cr-7Al at both temperatures. Conversely, an external Al2O3 layer formed on Ni-10Cr-7Al at both temperatures and on Ni-15Cr-7Al at 900 degrees C, while the scales grown initially on Ni-15Cr-7Al at 1000 degrees C were more complex, but eventually developed an innermost protective alumina layer. Thus, the addition of sufficient chromium levels to Ni-7Al produced a classical third-element effect, inducing the transition between internal and external oxidation of aluminum. This effect is interpreted on the basis of an extension to ternary alloys of a criterion first proposed by Wagner for the transition between internal and external oxidation of the most reactive component in binary alloys. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属	chinese acad sci, met res inst, 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, met res inst, state key lab corros & protect, wencui rd 62, shenyang 110016, peoples r china;yniu@imr.ac.cn
关键词	Ternary Alloys Ni-cr-al Oxidation Third-element Effect Cr-al Alloys Most-reactive Component High Oxidant Pressures Internal Oxidation Ternary Alloys External Oxidation High-temperature Protective Scales Aluminum Alloys Binary-alloys
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WOS记录号	WOS:000242766300010
引用统计	被引频次：90[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/321006/34414
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Niu,X. J. Zhang,Y. Wu,et al. The third-element effect in the oxidation of Ni-xCr-7Al (x=0, 5, 10 15 at.%) alloys in 1 atm O-2 at 900-1000 degrees C[J]. Corrosion Science,2006,48(12):4020-4036.
APA	Y. Niu,X. J. Zhang,Y. Wu,&F. Gesmundo.(2006).The third-element effect in the oxidation of Ni-xCr-7Al (x=0, 5, 10 15 at.%) alloys in 1 atm O-2 at 900-1000 degrees C.Corrosion Science,48(12),4020-4036.
MLA	Y. Niu,et al."The third-element effect in the oxidation of Ni-xCr-7Al (x=0, 5, 10 15 at.%) alloys in 1 atm O-2 at 900-1000 degrees C".Corrosion Science 48.12(2006):4020-4036.