Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings

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	Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings
	Z. Y. Liu; W. Gao; K. L. Dahm; F. H. Wang
	1998
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	46 期号:5 页码:1691-1700
摘要	Unbalanced magnetron sputter deposition was used to produce Ni-20Cr-xAl (s = 2, 3, 5 wt%) coatings on the substrates of the same materials. The effects of coating grain size and Al content on oxidation behaviour at 1000 degrees C have been studied. It a as found that the oxidation products were determined by both grain size and Al content. alpha-Al2O3 scales formed on the coatings containing as little as 2.4 wt% Al when the coating grain size was <100 nm. The oxidation behaviour was described using Wagner's theory to include short-circuit diffusion. With the formation of alpha-Al2O3 scale on coatings, the oxidation kinetics did not follow a parabolic law, but could be described with a new model that considered diffusion through both the lattice and grain boundaries. Based on the experimental results, a map showing the relationship between Al content, alloy grain size, and oxidation products has been established. (C) 1998 Acta Metallurgica Inc.
部门归属	univ auckland, dept chem & mat engn, auckland, new zealand. acad sinica, inst corros & protect met, state key lab corros & protect, shenyang 110015, peoples r china.;gao, w (reprint author), univ auckland, dept chem & mat engn, auckland, new zealand
关键词	Alloy Grain-size High-temperature Oxide Scales Resistance Superalloy K38g Transport Diffusion Chromium Yttrium
URL	查看原文
WOS记录号	WOS:000072632800021
引用统计	被引频次：205[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/321006/37724
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. Y. Liu,W. Gao,K. L. Dahm,et al. Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings[J]. Acta Materialia,1998,46(5):1691-1700.
APA	Z. Y. Liu,W. Gao,K. L. Dahm,&F. H. Wang.(1998).Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings.Acta Materialia,46(5),1691-1700.
MLA	Z. Y. Liu,et al."Oxidation behaviour of sputter-deposited Ni-Cr-Al micro-crystalline coatings".Acta Materialia 46.5(1998):1691-1700.