Cyclic Oxidation and Hot Corrosion Behavior of Y/Cr-Modified Aluminide Coatings Prepared by a Hybrid Slurry/Pack Cementation Process

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	Cyclic Oxidation and Hot Corrosion Behavior of Y/Cr-Modified Aluminide Coatings Prepared by a Hybrid Slurry/Pack Cementation Process
	J. T. Lu; S. L. Zhu; F. H. Wang
	2011
发表期刊	Oxidation of Metals
ISSN	0030-770X
卷号	76 期号:1-2 页码:67-82
摘要	Y/Cr-modified aluminide coatings were prepared on a Ni-base super-alloy K417G using a hybrid slurry/pack cementation process. The coatings consisted of a NiAl layer with dissolved Cr and Y. The microstructures and high temperature corrosion behavior of the coatings were characterized using SEM/EDS, XRD, EPMA and SIMS. Cyclic oxidation tests at 1000 degrees C for 200 h were carried out in air. The results indicated that specimens coated by either the Y/Cr-modified aluminide coatings or the simple aluminide coatings exhibited better oxidation resistances than the cast alloy. The Y/Cr-modified aluminide coatings possessed lower oxidation rates and better degradation resistance than the simple aluminide coatings during the oxidation tests. Furthermore, the alumina scales formed on the Y/Cr-modified aluminide coatings were considerably more adherent than those on the simple aluminide coatings during the thermal cycling. The hot corrosion tests consisted of applying a 25 wt% K(2)SO(4) + 75 wt% Na(2)SO(4) salt mixture to the specimens and exposing at 900 degrees C. The Y/Cr-modified aluminide coatings showed the longest service life compared with the cast alloy and aluminide coatings, which suffered significant sulfur attack. After 200 h, the Y/Cr-modified aluminide coatings were still protective.
部门归属	[lu, jintao; zhu, shenglong; wang, fuhui] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china.;lu, jt (reprint author), chinese acad sci, state key lab corros & protect, inst met res, wencui rd 62, shenyang 110016, peoples r china;jtlu@imr.ac.cn
关键词	Y/cr-modified Aluminide Coating Pack Cementation Process Slurry Oxidation Hot Corrosion High-temperature Oxidation Pack-cementation Base Superalloys Alloys Yttrium Nickel Cr Mechanism Al
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WOS记录号	WOS:000294691800005
引用统计	被引频次：28[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/321006/30560
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. T. Lu,S. L. Zhu,F. H. Wang. Cyclic Oxidation and Hot Corrosion Behavior of Y/Cr-Modified Aluminide Coatings Prepared by a Hybrid Slurry/Pack Cementation Process[J]. Oxidation of Metals,2011,76(1-2):67-82.
APA	J. T. Lu,S. L. Zhu,&F. H. Wang.(2011).Cyclic Oxidation and Hot Corrosion Behavior of Y/Cr-Modified Aluminide Coatings Prepared by a Hybrid Slurry/Pack Cementation Process.Oxidation of Metals,76(1-2),67-82.
MLA	J. T. Lu,et al."Cyclic Oxidation and Hot Corrosion Behavior of Y/Cr-Modified Aluminide Coatings Prepared by a Hybrid Slurry/Pack Cementation Process".Oxidation of Metals 76.1-2(2011):67-82.