Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃

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	Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃
其他题名	Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃
	LIU Guangming 1; LI Meishuan 1; MA Jinghui 2; DU Nan 2; ZHOU Yanchun 1
	2007
发表期刊	中国有色金属学会会刊：英文版
ISSN	1003-6326
卷号	17.0 期号:003 页码:595-599
摘要	Nanocrystalline CoCrA1Y overlay coating was prepared on M38G superalloy by magnetron sputtering deposition. To investigate the oxidation behavior and phase transformation of alumina during oxidation, the oxidation experiments were conducted at 1 050 ℃ for various time in the range of 5-180 min. The phase compositions of the oxide scales were investigated by using glancing angle X-ray diffraction（XRD）. The microstructure analysis of oxide scales was carried out by means of scanning electron microscopy（SEM）. The growth process of metastable alumina at the grain boundaries and transformation to stable alumina were discussed. The results show that at the initial oxidation stage the mixture of δ-Al2O3, γ-Al2O3 and α-Al2O3 is formed on the sample surface rapidly. Especially, δ-Al2O3 and γ-Al2O3 prefer growing at the grain boundaries of CoCrA1Y coating. With increasing oxidation time, δ-Al2O3 and γ-Al2O3 transform to θ-Al2O3, afterwards θ-Al2O3 transforms to α-Al2O3 gradually. After 180 min oxidation, θ-Al2O3 transforms into α-Al2O3 completely.
其他摘要	Nanocrystalline CoCrA1Y overlay coating was prepared on M38G superalloy by magnetron sputtering deposition. To investigate the oxidation behavior and phase transformation of alumina during oxidation, the oxidation experiments were conducted at 1 050 ℃ for various time in the range of 5-180 min. The phase compositions of the oxide scales were investigated by using glancing angle X-ray diffraction（XRD）. The microstructure analysis of oxide scales was carried out by means of scanning electron microscopy（SEM）. The growth process of metastable alumina at the grain boundaries and transformation to stable alumina were discussed. The results show that at the initial oxidation stage the mixture of δ-Al2O3, γ-Al2O3 and α-Al2O3 is formed on the sample surface rapidly. Especially, δ-Al2O3 and γ-Al2O3 prefer growing at the grain boundaries of CoCrA1Y coating. With increasing oxidation time, δ-Al2O3 and γ-Al2O3 transform to θ-Al2O3, afterwards θ-Al2O3 transforms to α-Al2O3 gradually. After 180 min oxidation, θ-Al2O3 transforms into α-Al2O3 completely.
关键词	氧化反应相位转换 CoCrAlY合金合金包覆钴铬铝钇
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:2827758
引用统计	被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/148461
专题	中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.School of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology
推荐引用方式 GB/T 7714	LIU Guangming,LI Meishuan,MA Jinghui,et al. Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃[J]. 中国有色金属学会会刊：英文版,2007,17.0(003):595-599.
APA	LIU Guangming,LI Meishuan,MA Jinghui,DU Nan,&ZHOU Yanchun.(2007).Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃.中国有色金属学会会刊：英文版,17.0(003),595-599.
MLA	LIU Guangming,et al."Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃".中国有色金属学会会刊：英文版 17.0.003(2007):595-599.