Oxidation of a novel chromium coating with CeO2 dispersions

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	Oxidation of a novel chromium coating with CeO2 dispersions
	L. Zhu; X. Peng; J. Yan; F. Wang
	2004
发表期刊	Oxidation of Metals
ISSN	0030-770X
卷号	62 期号:5-6 页码:411-426
摘要	Chromium coatings have been in widespread use to enhance the high-temperature oxidation resistance of low-alloy steely since the 1950s [Samuel and Lockington, Metal Treatment and Drop forgeing 18, 354 (1951); Sully and Brandes, Chromium, 2nd edn. Butterworths, London 1967]. In this work, a novel CeO2-dispersed chromium coating with a fine-grain structure was manufactured on a mild-carbon steel by Prior composite electrodeposition of Ni with CeO2 particles, followed by chromizing using a conventional halide activate, pack-cementation method. For comparison, chromizing was also performed on the carbon steel and on the one with Ni-plating pretreatment. Cyclic oxidation at 840degreesC for 120 h showed that among the three various samples chromized, the CeO2-dispersed chromium coating exhibited the best oxidation resistance, while the worst for the coating on the carbon steel The samples after oxidation were investigated using X-ray diffraction (XRD), scanning-electron microscopy equipped with energy dispersive X-ray analysis (SEMI/EDAX) and electron-probe microanalysis (EPMA). The results indicated that although all three coatings grew chromia scales during oxidation, the one formed on the CeO2-modified coating Was thinner, denser and had a fine-grain structured Moreover, the formation of "Kirkendall" voids and new precipitates, which occurred during oxidation below the scale in the chromium coating on the Ni-plated sample, was prevented in the presence of CeO2 particles in the coating The CeO2 effects on the coating formation and the coating oxidation behavior are discussed in detail.
部门归属	chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china.;peng, x (reprint author), chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china;xpeng@imr.ac.cn
关键词	Electrodepostion Chromizing Ceo2-dispersed Chromizing Coating Mild-carbon Steel High-temperature Oxidation Reactive-element Effect High-temperature Oxidation Ion-implanted Yttrium Reactive-element Selective Oxidation Stainless-steels Nickel Segregation Growth Scales Cr2o3
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WOS记录号	WOS:000226001700007
引用统计	被引频次：43[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/321006/35779
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	L. Zhu,X. Peng,J. Yan,et al. Oxidation of a novel chromium coating with CeO2 dispersions[J]. Oxidation of Metals,2004,62(5-6):411-426.
APA	L. Zhu,X. Peng,J. Yan,&F. Wang.(2004).Oxidation of a novel chromium coating with CeO2 dispersions.Oxidation of Metals,62(5-6),411-426.
MLA	L. Zhu,et al."Oxidation of a novel chromium coating with CeO2 dispersions".Oxidation of Metals 62.5-6(2004):411-426.