Corrosion behaviors of Cr2AlC/alpha-Al2O3 composites in 3.5 wt. % NaCl aqueous solution
文献类型：期刊论文
| 作者 | Zhang, Zerong1,2; Qian, Yuhai1; Xu, Jingjun1; Zuo, Jun1; Li, Meishuan1 |
| 刊名 | CERAMICS INTERNATIONAL
 |
| 出版日期 | 2020-06-01 |
| 卷号 | 46期号:8页码:11846-11853 |
| 关键词 | MAX phase Al2O3 Electrochemical corrosion Grain boundaries |
| ISSN号 | 0272-8842 |
| DOI | 10.1016/j.ceramint.2020.01.219 |
| 通讯作者 | Qian, Yuhai(yhqian@imr.ac.cn) |
| 英文摘要 | Cr2AlC and its composites containing alpha-Al2O3 (6.1 and 15.2 wt %) were prepared by hot pressing and their corrosion behaviors in air-saturated 3.5 wt % NaCl aqueous solution were investigated by electrochemical testing methods. It was revealed that the secondary phase of Al2O3 particles mainly distributed along grain boundaries of Cr2AlC matrix. The potentiodynamic polarization measurements showed that the corrosion current densities of these Cr2AlC composites were lower than that of the pure Cr2AlC. The Aluminum in Cr2AlC was prone to be attacked more easily. When immersed at open circuit potential (OCP), Al readily slipped out from Cr2AlC matrix into NaCl solution in the form of dissoluble species. But in the case of polarization, regardless of potentiostatic polarization or potentiodynamic polarization, more de-intercalated Al, reacted with the electrolyte to form corrosion products of Al2O3 and/or AlOOH and deposited on the sample surface. For Cr2AlC/alpha-Al2O3 composites, the presence of Al2O3 weakened the corrosion along grain boundaries by partly blocking the permeation of electrolyte and inhibiting the anodic dissolution process. |
| 资助项目 | National Natural Science Foundation of China[51571205] ; National Natural Science Foundation of China[51571203] |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000528483600046 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.imr.ac.cn/handle/321006/138657]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Qian, Yuhai |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Zerong,Qian, Yuhai,Xu, Jingjun,et al. Corrosion behaviors of Cr2AlC/alpha-Al2O3 composites in 3.5 wt. % NaCl aqueous solution[J]. CERAMICS INTERNATIONAL,2020,46(8):11846-11853. |
| APA | Zhang, Zerong,Qian, Yuhai,Xu, Jingjun,Zuo, Jun,&Li, Meishuan.(2020).Corrosion behaviors of Cr2AlC/alpha-Al2O3 composites in 3.5 wt. % NaCl aqueous solution.CERAMICS INTERNATIONAL,46(8),11846-11853. |
| MLA | Zhang, Zerong,et al."Corrosion behaviors of Cr2AlC/alpha-Al2O3 composites in 3.5 wt. % NaCl aqueous solution".CERAMICS INTERNATIONAL 46.8(2020):11846-11853. |
入库方式： OAI收割
来源：金属研究所
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