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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
ISSN0169-4332
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
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.
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