| Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050 degrees C |
| G. Liu; M. Li; J. Ma; D. Nan; Y. Zhou
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| 2007
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| 发表期刊 | Transactions of Nonferrous Metals Society of China
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| ISSN | 1003-6326
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| 卷号 | 17期号:3页码:595-599 |
| 摘要 | Nanocrystalline CoCrAlY 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 degrees C for various time in the range of 5-180 min. The phase compositions of the oxide scales were investigated by using glancing an-le 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 (delta-Al2O3, gamma-Al2O3 and alpha-Al2O3 is formed on the sample surface rapidly. Especially, delta-Al2O3 and gamma-Al2O3 prefer growing at the grain boundaries of CoCrAlY coating. With increasing oxidation time, delta-Al2O3 and gamma-Al2O3 transform to theta-Al2O3, afterwards theta-Al2O3 transforms to alpha-Al2O3 gradually. After 180 min oxidation, theta-Al2O3 transforms into alpha-Al2O3 completely. |
| 部门归属 | chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. sch mat sci & engn, nanchang inst aeronaut technol, nanchang 330034, peoples r china.;liu, g (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china;tisic@126.com
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| 关键词 | Cocraly Coating
Oxidation
Al2o3
Phase Transformation
High-temperature Oxidation
Theta-alpha-al2o3 Transformation
Alloys
Growth
Scales
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| URL | 查看原文
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| WOS记录号 | WOS:000247996200028
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/33698
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
G. Liu,M. Li,J. Ma,et al. Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050 degrees C[J]. Transactions of Nonferrous Metals Society of China,2007,17(3):595-599.
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| APA |
G. Liu,M. Li,J. Ma,D. Nan,&Y. Zhou.(2007).Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050 degrees C.Transactions of Nonferrous Metals Society of China,17(3),595-599.
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| MLA |
G. Liu,et al."Transient oxidation behavior of nanocrystalline CoCrAlY coating at 1050 degrees C".Transactions of Nonferrous Metals Society of China 17.3(2007):595-599.
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