Surface orientation dependent oxidation behavior of aluminized DS CM 247 LC nickel-base superalloy
文献类型：期刊论文
| 作者 | F. H. Yuan ; Y. S. Yoo ; C. Y. Jo ; B. G. Choi ; Z. Q. Hu |
| 刊名 | Surface & Coatings Technology
 |
| 出版日期 | 2004 |
| 卷号 | 183期号:1页码:106-110 |
| 关键词 | nickel alloy pack diffusion coating oxidation directional solidification aluminide coating oxidation anisotropy crystallographic relationships coatings microstructures mar-m247 growth |
| ISSN号 | 0257-8972 |
| 中文摘要 | A study has been carried out into the oxidation behavior of a directionally solidified superalloy. Three types of specimens were cut transversely (T), longitudinally (L) and at 45degrees angle (45degrees) in relation to the solidifying direction of the DS CM 247 LC rods. These specimens were aluminized by the pack cementation method and then were oxidized at 1000 degreesC for 200 h. The coating grows epitaxially on (0 0 1) surfaces of the directionally solidified superalloy. Epitaxy of the coating on the L specimens is also evident. All the coatings on the above specimens consist of a precipitation-rich layer, a precipitation-free layer and an interdiffusion layer. Lamellar alpha-Cr precipitates directly in the substrate underneath the interdiffusion layer during the aluminization process, and in the subsequent interdiffusion process during the oxidation tests. The formation of the theta-Al2O3 leads to a fast oxidation rate for the T, L and 45degrees specimens in the transient stage. The 45degrees specimens oxidized at the fastest rate, while the T specimens gave the smallest weight gain. After 20 h, further weight gains of all these specimens are very small, due to more stable alpha-Al2O3 growth and transformation from theta-Al2O3 to alpha-Al2O3. The slower oxidation rate in the case of the T specimens might be a result of epitaxial growth of theta-Al2O3 on the beta-NiAl coating. (C) 2003 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/35695]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | F. H. Yuan,Y. S. Yoo,C. Y. Jo,et al. Surface orientation dependent oxidation behavior of aluminized DS CM 247 LC nickel-base superalloy[J]. Surface & Coatings Technology,2004,183(1):106-110. |
| APA | F. H. Yuan,Y. S. Yoo,C. Y. Jo,B. G. Choi,&Z. Q. Hu.(2004).Surface orientation dependent oxidation behavior of aluminized DS CM 247 LC nickel-base superalloy.Surface & Coatings Technology,183(1),106-110. |
| MLA | F. H. Yuan,et al."Surface orientation dependent oxidation behavior of aluminized DS CM 247 LC nickel-base superalloy".Surface & Coatings Technology 183.1(2004):106-110. |
入库方式： OAI收割
来源：金属研究所
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