A study on microstructure evolution of MCrAlY coatings after thermal aging in Te environment
文献类型：期刊论文
| 作者 | Wu, Jijin1,2; Han, Fenfen1,2; Jiang, Sumeng3; Li, Wei3; Ji, Weichi1,4; Huang, Hefei1,2 |
| 刊名 | SURFACE & COATINGS TECHNOLOGY
 |
| 出版日期 | 2024-10-30 |
| 卷号 | 494页码:13 |
| 关键词 | GH3535 alloy MCrAlY coating Tellurium diffusion Intergranular embrittlement Molten salt reactors |
| ISSN号 | 0257-8972 |
| DOI | 10.1016/j.surfcoat.2024.131490 |
| 通讯作者 | Han, Fenfen(hanfenfen@sinap.ac.cn) ; Huang, Hefei(huanghefei@sinap.ac.cn) |
| 英文摘要 | The effects of thermal exposure on tellurium (Te) diffusion behavior in MCrAlY coatings were investigated at 800 degrees C in Te vapor. The results showed that the diffusion depth of Te in MCrAlY coatings gradually increased with the exposure time, and the dense Cr3Te4 layer formed on the coating surface in the initial stage was no longer continuous, especially under aging conditions with higher Te concentration. The high Cr content of the coating promoted the solid phase transition of the surface reaction product from Cr3Te4 to Cr7Te8, and resulting in the formation of large alpha-Cr phase either within or beneath the reaction layer during long aging processes. As a result of this phase transition, excess Te atoms were released from Cr3Te4 and continued to diffuse into the coating. Te did not exhibit obvious intergranular diffusion characteristics within the coating. When it encountered Y, it was captured by Y and formed a YTe phase. After aging for 3000 h, Te was distributed throughout the coating, and numerous voids were formed at the interface between the coating and the substrate. These two factors deteriorated the plasticity and adhesion of the coating. Results from molten salt corrosion tests indicated that the high content of Cr and Al in the coating, as well as high densities of grain boundaries providing diffusion pathways, reduced the corrosion resistance of the coating to molten salt. |
| 资助项目 | National Natural Science Foundation of China[12425511] ; National Natural Science Foundation of China[12375280] ; National Natural Science Foundation of China[U2341261] |
| WOS研究方向 | Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:001343596100001 |
| 出版者 | ELSEVIER SCIENCE SA |
| 资助机构 | National Natural Science Foundation of China |
| 源URL |  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Han, Fenfen; Huang, Hefei |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 4.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Jijin,Han, Fenfen,Jiang, Sumeng,et al. A study on microstructure evolution of MCrAlY coatings after thermal aging in Te environment[J]. SURFACE & COATINGS TECHNOLOGY,2024,494:13. |
| APA | Wu, Jijin,Han, Fenfen,Jiang, Sumeng,Li, Wei,Ji, Weichi,&Huang, Hefei.(2024).A study on microstructure evolution of MCrAlY coatings after thermal aging in Te environment.SURFACE & COATINGS TECHNOLOGY,494,13. |
| MLA | Wu, Jijin,et al."A study on microstructure evolution of MCrAlY coatings after thermal aging in Te environment".SURFACE & COATINGS TECHNOLOGY 494(2024):13. |
入库方式： OAI收割
来源：金属研究所
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