Investigation on Optimal Ta/Cr Ratio of a Single Crystal Ni-Base Superalloy in View of the Isothermal Oxidation Behavior
文献类型：期刊论文
| 作者 | Chang, Jianxiu2; Feng, Wenhao2; Zhao, Wenwen2; Jia, Hongmin2; Liu, Yanming2; Luo, Sheji2; Wang, Dong1; Dong, Jiasheng1 |
| 刊名 | CRYSTALS
 |
| 出版日期 | 2021-11-01 |
| 卷号 | 11期号:11页码:15 |
| 关键词 | superalloy high-temperature oxidation tantalum oxide |
| DOI | 10.3390/cryst11111421 |
| 通讯作者 | Chang, Jianxiu() |
| 英文摘要 | The relative content of strengthening element tantalum (Ta) and oxidation-resistant element chromium (Cr) is an essential value for superalloys to obtain an excellent combination of oxidation resistance and mechanical properties. In the present paper, the isothermal oxidation behavior of several single crystal Ni-base superalloys with different Ta/Cr (wt. %, similarly hereinafter) ratios at 1000 & DEG;C in static air has been systematically investigated to explore the optimal Ta/Cr for excellent oxidation resistance. A detailed microstructure study using X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and an electro-probe microanalyzer (EPMA) was performed to reveal the oxidation products and mechanisms. For all alloys, a three-layer structured scale consisting of an outer (Cr, Al, Ti, Ni, Ta)-O layer, an inner Al2O3 layer and an inner nitride layer was formed. As Ta/Cr increased, the amounts of Ta-containing products, cracks, holes and inner nitride increased. Meanwhile, the completeness of the Al2O3 layer got worse. It was shown that if Ta/Cr & LE; 0.5, Ta increased the growth rate of Cr2O3 via the doping effect induced by Ta cations. If Ta/Cr > 0.5, Ta reduced the completeness of Cr2O3 through competitive growth of Ta2O5 and Cr2O3. A good oxidation performance can be expected with the value Ta/Cr & LE; 0.5. |
| 资助项目 | National Natural Science Foundation of China[51901179] ; National Science and Technology Major Project[2017-VI-0019-0091] ; National Science Foundation of Shaanxi Province of China[2018JQ5198] |
| WOS研究方向 | Crystallography ; Materials Science |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000723789300001 |
| 资助机构 | National Natural Science Foundation of China ; National Science and Technology Major Project ; National Science Foundation of Shaanxi Province of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/167493]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Chang, Jianxiu |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Superalloys Div, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Xian Shiyou Univ, Coll Mat Sci & Engn, Xian 710065, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chang, Jianxiu,Feng, Wenhao,Zhao, Wenwen,et al. Investigation on Optimal Ta/Cr Ratio of a Single Crystal Ni-Base Superalloy in View of the Isothermal Oxidation Behavior[J]. CRYSTALS,2021,11(11):15. |
| APA | Chang, Jianxiu.,Feng, Wenhao.,Zhao, Wenwen.,Jia, Hongmin.,Liu, Yanming.,...&Dong, Jiasheng.(2021).Investigation on Optimal Ta/Cr Ratio of a Single Crystal Ni-Base Superalloy in View of the Isothermal Oxidation Behavior.CRYSTALS,11(11),15. |
| MLA | Chang, Jianxiu,et al."Investigation on Optimal Ta/Cr Ratio of a Single Crystal Ni-Base Superalloy in View of the Isothermal Oxidation Behavior".CRYSTALS 11.11(2021):15. |
入库方式： OAI收割
来源：金属研究所
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