| Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃ | |
| Alternative Title | Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050℃ |
| LIU Guangming1; LI Meishuan1; MA Jinghui2; DU Nan2; ZHOU Yanchun1 | |
| 2007 | |
| Source Publication | 中国有色金属学会会刊：英文版
 |
| ISSN | 1003-6326 |
| Volume | 17.0Issue:003Pages:595-599 |
| Abstract | 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. |
| Other Abstract | 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. |
| Keyword | 氧化反应 相位转换 CoCrAlY合金 合金包覆 钴 铬 铝 钇 |
| Indexed By | CSCD |
| Language | 中文 |
| CSCD ID | CSCD:2827758 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/148461 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.中国科学院金属研究所 2.School of Materials Science and Engineering, Nanchang Institute of Aeronautical Technology |
| Recommended Citation 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. |
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