Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 h
The oxidation products formed on ferritic/martensitic (F/M) steel exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 550 °C for 1000 h were investigated using various characterizations. The results indicate that the corrosion products consist of three distinct layers from the inside to the o...
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Elsevier
2024-11-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424023329 |
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| author | Hao Wang Fujian Zhang Jun Xiao Linjiang Chai Qi Xu Xin Yin Ke Zhao Ning Guo Zhongwen Yao Shaoyu Qiu |
| author_facet | Hao Wang Fujian Zhang Jun Xiao Linjiang Chai Qi Xu Xin Yin Ke Zhao Ning Guo Zhongwen Yao Shaoyu Qiu |
| author_sort | Hao Wang |
| collection | DOAJ |
| description | The oxidation products formed on ferritic/martensitic (F/M) steel exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 550 °C for 1000 h were investigated using various characterizations. The results indicate that the corrosion products consist of three distinct layers from the inside to the outside: the inner oxidation zone (IOZ), a middle oxide layer, and the growth front facing LBE. In the IOZ, although O has penetrated the entire oxidation layer, the martensite laths and ferrite grains remain visible. However, significant segregation of Cr and O along the laths and grain boundaries has occurred, resulting in the formation of strip-shaped Cr2O3 particles. In the matrix adjacent to the IOZ, Cr atoms have segregated at the grain boundaries and martensite laths, forming Cr-rich regions, while O atoms have not yet infiltrated. During the growth of Fe3O4 grains, the priority formed strip-shaped Cr2O3 particles are pushed toward the corrosion front until they detach from the F/M steel and disperse into the LBE, resulting in nearly pure Fe3O4 grains in the middle layer. The gradient three-layer structure of the oxidation product is closely associated with the segregation of Cr and the gradient distribution of oxygen partial pressure (PO2). |
| format | Article |
| id | doaj-art-a6b8a345b6504960b554d91abe65b488 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-a6b8a345b6504960b554d91abe65b4882025-08-20T01:57:20ZengElsevierJournal of Materials Research and Technology2238-78542024-11-01333649365810.1016/j.jmrt.2024.10.062Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 hHao Wang0Fujian Zhang1Jun Xiao2Linjiang Chai3Qi Xu4Xin Yin5Ke Zhao6Ning Guo7Zhongwen Yao8Shaoyu Qiu9State Key Laboratory of Advanced Nuclear Energy Technology, Nuclear Power Institute of China, Chengdu, 610213, China; Corresponding author.School of Materials and Energy, Southwest University, Chongqing, 400715, ChinaState Key Laboratory of Advanced Nuclear Energy Technology, Nuclear Power Institute of China, Chengdu, 610213, ChinaCollege of Material Science and Engineering, Chongqing University of Technology, Chongqing, 400054, ChinaState Key Laboratory of Advanced Nuclear Energy Technology, Nuclear Power Institute of China, Chengdu, 610213, ChinaState Key Laboratory of Advanced Nuclear Energy Technology, Nuclear Power Institute of China, Chengdu, 610213, ChinaState Key Laboratory of Advanced Nuclear Energy Technology, Nuclear Power Institute of China, Chengdu, 610213, ChinaSchool of Materials and Energy, Southwest University, Chongqing, 400715, China; Corresponding author.Department of Mechanical and Materials Engineering, Queen's University, Kingston, K7L4M9, ON, CanadaState Key Laboratory of Advanced Nuclear Energy Technology, Nuclear Power Institute of China, Chengdu, 610213, ChinaThe oxidation products formed on ferritic/martensitic (F/M) steel exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 550 °C for 1000 h were investigated using various characterizations. The results indicate that the corrosion products consist of three distinct layers from the inside to the outside: the inner oxidation zone (IOZ), a middle oxide layer, and the growth front facing LBE. In the IOZ, although O has penetrated the entire oxidation layer, the martensite laths and ferrite grains remain visible. However, significant segregation of Cr and O along the laths and grain boundaries has occurred, resulting in the formation of strip-shaped Cr2O3 particles. In the matrix adjacent to the IOZ, Cr atoms have segregated at the grain boundaries and martensite laths, forming Cr-rich regions, while O atoms have not yet infiltrated. During the growth of Fe3O4 grains, the priority formed strip-shaped Cr2O3 particles are pushed toward the corrosion front until they detach from the F/M steel and disperse into the LBE, resulting in nearly pure Fe3O4 grains in the middle layer. The gradient three-layer structure of the oxidation product is closely associated with the segregation of Cr and the gradient distribution of oxygen partial pressure (PO2).http://www.sciencedirect.com/science/article/pii/S2238785424023329F/M steelLead-bismuth eutecticInternal oxidation zoneOxidation |
| spellingShingle | Hao Wang Fujian Zhang Jun Xiao Linjiang Chai Qi Xu Xin Yin Ke Zhao Ning Guo Zhongwen Yao Shaoyu Qiu Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 h Journal of Materials Research and Technology F/M steel Lead-bismuth eutectic Internal oxidation zone Oxidation |
| title | Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 h |
| title_full | Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 h |
| title_fullStr | Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 h |
| title_full_unstemmed | Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 h |
| title_short | Microstructural characteristics of the internal oxidation zone of ferritic/martensitic steel exposed to LBE at 550°C for 1000 h |
| title_sort | microstructural characteristics of the internal oxidation zone of ferritic martensitic steel exposed to lbe at 550°c for 1000 h |
| topic | F/M steel Lead-bismuth eutectic Internal oxidation zone Oxidation |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424023329 |
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