A magnetron sputtered microcrystalline beta-NiAl coating for SC superalloys. Part II. Effects of a NiCrO diffusion barrier on oxidation behavior at 1100 degrees C

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	A magnetron sputtered microcrystalline beta-NiAl coating for SC superalloys. Part II. Effects of a NiCrO diffusion barrier on oxidation behavior at 1100 degrees C
	Yao, Hongrui; Bao, Zebin; Shen, Mingli; Zhu, Shenglong; Wang, Fuhui; Zhu, SL (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Shenyang 110016, Peoples R China.
	2017-06-15
发表期刊	APPLIED SURFACE SCIENCE
ISSN	0169-4332
卷号	407 页码:485-494
摘要	Arc ion plated-NiCrO interlayer was fabricated as an active diffusion barrier for microcrystalline beta-NiAl coating on Ni-base single crystal Rene N5 superalloy. The effects of the NiCrO barrier layer on the cyclic oxidation behavior at 1100 degrees C were investigated. The microstructure of coated specimens was characterized by SEM, XRD, XPS and TEM. The microcrystalline beta-NiAl coating without NiCrO barrier layer exhibited good oxidation resistance by forming exclusive alpha-A1203 scales during cyclic oxidation tests at 1100 degrees C in air. However, the formation of thick interdiffusion zone (IDZ) and secondary reaction zone (SRZ), which accelerated coating degradation, was observed. The NiCrO barrier layer was transformed into alpha-Al2O3/Metal/alpha-Al2O3 sandwich structure during vacuum annealing at 1000 degrees C. The sandwich structure was adherent to the coating and the substrate, prevented the formation of IDZ and SRZ, and retarded the coating degradation effectively during cyclic oxidation tests. The mechanism for the formation of SRZ in NiAI coated single crystal superalloy and the mechanism for the transformation of NiCrO interlayer into alpha-Al2O3/Metal/alpha-Al2O3 sandwich structure were discussed. (C) 2017 Elsevier B.V. All rights reserved.; Arc ion plated-NiCrO interlayer was fabricated as an active diffusion barrier for microcrystalline beta-NiAl coating on Ni-base single crystal Rene N5 superalloy. The effects of the NiCrO barrier layer on the cyclic oxidation behavior at 1100 degrees C were investigated. The microstructure of coated specimens was characterized by SEM, XRD, XPS and TEM. The microcrystalline beta-NiAl coating without NiCrO barrier layer exhibited good oxidation resistance by forming exclusive alpha-A1203 scales during cyclic oxidation tests at 1100 degrees C in air. However, the formation of thick interdiffusion zone (IDZ) and secondary reaction zone (SRZ), which accelerated coating degradation, was observed. The NiCrO barrier layer was transformed into alpha-Al2O3/Metal/alpha-Al2O3 sandwich structure during vacuum annealing at 1000 degrees C. The sandwich structure was adherent to the coating and the substrate, prevented the formation of IDZ and SRZ, and retarded the coating degradation effectively during cyclic oxidation tests. The mechanism for the formation of SRZ in NiAI coated single crystal superalloy and the mechanism for the transformation of NiCrO interlayer into alpha-Al2O3/Metal/alpha-Al2O3 sandwich structure were discussed. (C) 2017 Elsevier B.V. All rights reserved.
部门归属	[yao, hongrui ; bao, zebin ; shen, mingli ; zhu, shenglong ; wang, fuhui] chinese acad sci, inst met res, lab corros & protect, shenyang 110016, peoples r china ; [yao, hongrui] univ chinese acad sci, beijing 100049, peoples r china
关键词	Beta-nial Oxidation Secondary Reaction Zone Diffusion Barrier
学科领域	Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
资助者	National Key Basic Research Program of China (973 Program) [2012CB625100]; National Nature Science Foundation of China [51231001]
收录类别	SCI
语种	英语
WOS记录号	WOS:000399507700062
引用统计	被引频次：38[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/321006/78086
专题	中国科学院金属研究所
通讯作者	Zhu, SL (reprint author), Chinese Acad Sci, Inst Met Res, Lab Corros & Protect, Shenyang 110016, Peoples R China.
推荐引用方式 GB/T 7714	Yao, Hongrui,Bao, Zebin,Shen, Mingli,et al. A magnetron sputtered microcrystalline beta-NiAl coating for SC superalloys. Part II. Effects of a NiCrO diffusion barrier on oxidation behavior at 1100 degrees C[J]. APPLIED SURFACE SCIENCE,2017,407:485-494.
APA	Yao, Hongrui,Bao, Zebin,Shen, Mingli,Zhu, Shenglong,Wang, Fuhui,&Zhu, SL .(2017).A magnetron sputtered microcrystalline beta-NiAl coating for SC superalloys. Part II. Effects of a NiCrO diffusion barrier on oxidation behavior at 1100 degrees C.APPLIED SURFACE SCIENCE,407,485-494.
MLA	Yao, Hongrui,et al."A magnetron sputtered microcrystalline beta-NiAl coating for SC superalloys. Part II. Effects of a NiCrO diffusion barrier on oxidation behavior at 1100 degrees C".APPLIED SURFACE SCIENCE 407(2017):485-494.