Improvement in oxidation resistance of a Ni3Al-based superalloy IC6 by rhenium-based diffusion barrier coatings

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	Improvement in oxidation resistance of a Ni3Al-based superalloy IC6 by rhenium-based diffusion barrier coatings
	F. Lang; T. Narita
	2007
发表期刊	Intermetallics
ISSN	0966-9795
卷号	15 期号:4 页码:599-606
摘要	The oxidation behavior of a Ni3Al-based superalloy IC6 coated with a duplex Re-Cr-Ni-Mo diffusion barrier layer and an Al reservoir layer was investigated in air at 1423 K for up to 1080 ks. The diffusion barrier layer was formed by electroplating Re(Ni) and Ni films on the alloy, followed by Cr pack cementation at 1573 K, and as a result, forms a continuous inner Re-&-Ni-Mo diffusion barrier layer and an outer Ni(Cr,Mo,Al) layer. Then a Ni film was electroplated on the Ni(Cr,Mo,Al) layer, followed by Al-pack cementation at 1273 K for 18 ks, to form an Al reservoir layer with a duplex Ni2Al3 and y-Ni(Cr,Mo,Al) layers. After oxidation at 1423 K in air for 1080 ks, the Al reservoir layer changed to a gamma-Ni-Cr-4-Mo-5-12Al (all in at%) layer, on which a protective alpha-Al2O3 scale formed. The Re-Cr(Mo)-Ni layer was stable and effectively retarded the interdiffusion between the Al reservoir layer and the alloy, as a result, the depth of the microstructural change zone of the alloy was less than 15 mu m. In contrast, the bare and the coated IC6 superalloy only with an Al reservoir layer were significantly oxidized, accompanied by serious spallation of oxide scales. After oxidation at 1423 K for 1080 ks, the depth of the microstructural change zone of the alloy was about 200 mu m for the bare and coated alloy only with an Al reservoir layer. These results indicate that the oxidation resistance of IC6 superalloy can be effectively improved by coating with a Re-&-Ni-Mo diffusion barrier layer and an Al reservoir layer. (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. hokkaido univ, grad sch engn, res grp interface control engn, sapporo, hokkaido 0608628, japan.;lang, f (reprint author), chinese acad sci, met res inst, state key lab corros & protect, 62 wencui rd, shenyang 110016, peoples r china;fqlang325@yahoo.co.jp
关键词	Nickel Aluminides Based On Ni3al Oxidation Diffusion Coatings Intermetallic And Otherwise Ni3al Based Alloy Degrees c Mechanisms Behavior
URL	查看原文
WOS记录号	WOS:000245772100019
引用统计	被引频次：45[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/321006/33620
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	F. Lang,T. Narita. Improvement in oxidation resistance of a Ni3Al-based superalloy IC6 by rhenium-based diffusion barrier coatings[J]. Intermetallics,2007,15(4):599-606.
APA	F. Lang,&T. Narita.(2007).Improvement in oxidation resistance of a Ni3Al-based superalloy IC6 by rhenium-based diffusion barrier coatings.Intermetallics,15(4),599-606.
MLA	F. Lang,et al."Improvement in oxidation resistance of a Ni3Al-based superalloy IC6 by rhenium-based diffusion barrier coatings".Intermetallics 15.4(2007):599-606.