Hot corrosion behavior of AIP NiCoCrAlY(SiB) coatings on nickel base superalloys

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	Hot corrosion behavior of AIP NiCoCrAlY(SiB) coatings on nickel base superalloys
	Q. M. Wang; Y. N. Wu; P. L. Ke; H. T. Cao; J. Gong; C. Sun; L. S. Wen
	2004
发表期刊	Surface & Coatings Technology
ISSN	0257-8972
卷号	186 期号:3 页码:389-397
摘要	NiCoCrAlY(SiB) coatings were deposited on the nickel base superalloys DZ125 and DSM11 by arc ion plating (AIP). The corrosion behavior of the bare alloys and the protective coatings in molten 75 wt.% Na2SO4 + 25 wt.% K2SO4 at 900degreesC in air was tested for 90 h. The results indicated that DZ125 superalloy suffered catastrophic corrosion after 5 It exposure and a thick porous oxide scale (500-600 mum) interspersed with Ni3S2 and alloy particles formed on the alloy. For the Cr-rich DSM11 alloy, a mild corrosion attack happened, but severe internal Al-rich oxidation occurred inside the alloy. With NiCoCrAlY and NiCoCrAlYSiB coatings, the hot corrosion resistance of the systems was improved due to the formation of an alpha-Al2O3 scale. The hot corrosion resistance of the coatings with additions of Si and B can be improved by promoting the growth of a dense and continuous alpha-Al2O3 layer in the initial stage and improving the adherence of the oxide scale to the coating in the subsequent hot corrosion process. The hot corrosion degradation mechanism of the NiCoCrAlYSiB coatings and the influence of the substrate materials on the behavior of the whole system were also investigated. (C) 2004 Elsevier B.V. All rights reserved.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;wang, qm (reprint author), chinese acad sci, inst met res, state key lab corros & protect, 72 wenhua rd, shenyang 110016, peoples r china;qmwang@imr.ac.cn
关键词	Nicocraly Nicocralysib Arc Ion Plating Aip Hot Corrosion Molten Sulfate Protective-coatings Oxidation Behavior Mcraly Coatings Alloys
URL	查看原文
WOS记录号	WOS:000223408400008
引用统计	被引频次：83[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/321006/35588
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Q. M. Wang,Y. N. Wu,P. L. Ke,et al. Hot corrosion behavior of AIP NiCoCrAlY(SiB) coatings on nickel base superalloys[J]. Surface & Coatings Technology,2004,186(3):389-397.
APA	Q. M. Wang.,Y. N. Wu.,P. L. Ke.,H. T. Cao.,J. Gong.,...&L. S. Wen.(2004).Hot corrosion behavior of AIP NiCoCrAlY(SiB) coatings on nickel base superalloys.Surface & Coatings Technology,186(3),389-397.
MLA	Q. M. Wang,et al."Hot corrosion behavior of AIP NiCoCrAlY(SiB) coatings on nickel base superalloys".Surface & Coatings Technology 186.3(2004):389-397.