| Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air | |
| Chunting, Liu; Xiaofeng, Sun; Ji, Ma; Haiyan, Cong; Wanfeng, Liu | |
| Corresponding Author | Chunting, Liu(liuchunting76@yahoo.com.cn) |
| 2007-08-01 | |
| Source Publication | RARE METAL MATERIALS AND ENGINEERING
 |
| ISSN | 1002-185X |
| Volume | 36Issue:8Pages:1407-1411 |
| Abstract | The high temperature oxidation behavior of the single-crystal Ni-base superalloy DD32 containing rhenium was investigated at 900 degrees C and 1000 degrees C in air by using SEM, XRD, and SEM/EDAX. It is found that there are two oxidation stages in the oxidation kinetics curves at 900 degrees C and 1000 degrees C. In the initial stage, the mass gain rapidly increases and basically obeys a parabola law due to the formation and growth of NiO. In the second oxidation stage, it obeys the asymptotic level linear law with the oxidation time increasing to a critical time when the mass gain goes to be slow, and the Kp value corresponds to the formation and growth of Al2O3. There are three layers for the oxidation film at 900 degrees C and 1000 degrees C: an outer layer of columnar (Ni,Co)O, an intermediate layer mainly composed of complex oxides and a small amount of spinels, and a continuous inner layer of alpha-Al2O3. The phase rich in Re and W precipitates may play a role of "diffusion barrier", which is distributed in the intermediate layer during oxidation, effectively decreases the diffusion rate of Al element in the substrate outward. As a result, a continuous oxide layer of Al2O3 is formed in the inner layer to restrain the growth of oxide film and decrease the oxidation rate. |
| Keyword | single-crystal Ni-base superalloy DD32 Re isothermal oxidation |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000249456800022 |
| Publisher | NORTHWEST INST NONFERROUS METAL RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/89665 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Chunting, Liu |
| Affiliation | 1.Qingdao Univ Sci & Technol, Qingdao 266061, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Qingdao Zero Elect Co Ltd, Qingdao 266101, Peoples R China 4.Labour Bur, Qingdao 266000, Peoples R China |
| Recommended Citation GB/T 7714 | Chunting, Liu,Xiaofeng, Sun,Ji, Ma,et al. Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air[J]. RARE METAL MATERIALS AND ENGINEERING,2007,36(8):1407-1411. |
| APA | Chunting, Liu,Xiaofeng, Sun,Ji, Ma,Haiyan, Cong,&Wanfeng, Liu.(2007).Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air.RARE METAL MATERIALS AND ENGINEERING,36(8),1407-1411. |
| MLA | Chunting, Liu,et al."Isothermal oxidation behavior of single-crystal Ni-base superalloy containing rhenium in air".RARE METAL MATERIALS AND ENGINEERING 36.8(2007):1407-1411. |
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