Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBE
Increasing the content of Si element in austenitic stainless steels is a strategic approach to improve their dissolution corrosion resistance in liquid lead-bismuth eutectic (LBE) at elevated temperature. In this work, a Si-modified austenitic steel was exposed to static liquid LBE with saturated an...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425012852 |
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| author | Hao Ren Xiaoxin Zhang Xian Zeng Xiaodong Huang Decang Zhang Jun Zhang Qingzhi Yan |
| author_facet | Hao Ren Xiaoxin Zhang Xian Zeng Xiaodong Huang Decang Zhang Jun Zhang Qingzhi Yan |
| author_sort | Hao Ren |
| collection | DOAJ |
| description | Increasing the content of Si element in austenitic stainless steels is a strategic approach to improve their dissolution corrosion resistance in liquid lead-bismuth eutectic (LBE) at elevated temperature. In this work, a Si-modified austenitic steel was exposed to static liquid LBE with saturated and 10−8 wt.% oxygen concentration at 600 °C for up to 3000 h. After exposing to oxygen-saturated LBE, the oxide scale formed on Fe–Cr–Ni–Si steel comprises a multi-layer structure, including Fe–Cr spinel, magnetite and PbFe4O7. A large number of SiO2 nanoparticles with a size of ∼200 nm are observed in FeCr2O4 oxide film. In contrast, for the samples immersing in liquid LBE with 10−8 wt.% oxygen concentration, amorphous SiO2 bands rather than nanoparticles are distributed among Cr2O3 oxides in IOZ. The dense Si-rich oxide film hinders the dissolution corrosion of HLM on austenitic steel. Meanwhile, the low oxygen concentration in LBE suppresses the formation of magnetite and promotes the growth of SiO2 into a more continuous banded oxides than nanoparticles. |
| format | Article |
| id | doaj-art-119c04df83894fdcb7d0d3fb2b608e14 |
| institution | OA Journals |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-119c04df83894fdcb7d0d3fb2b608e142025-08-20T01:52:59ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01368906891910.1016/j.jmrt.2025.05.130Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBEHao Ren0Xiaoxin Zhang1Xian Zeng2Xiaodong Huang3Decang Zhang4Jun Zhang5Qingzhi Yan6Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author. Xueyuan Road 30, Haidian District, Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.China Nuclear Power Technology Research Institute, Shenzhen, 518000, China; Corresponding author. Shangbu Middle Road, Futian District, China Nuclear Power Technology Research Institute, Shenzhen, 518000, China.Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, ChinaInstitute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China; Corresponding author. Xueyuan Road 30, Haidian District, Institute of Nuclear Materials, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China.Increasing the content of Si element in austenitic stainless steels is a strategic approach to improve their dissolution corrosion resistance in liquid lead-bismuth eutectic (LBE) at elevated temperature. In this work, a Si-modified austenitic steel was exposed to static liquid LBE with saturated and 10−8 wt.% oxygen concentration at 600 °C for up to 3000 h. After exposing to oxygen-saturated LBE, the oxide scale formed on Fe–Cr–Ni–Si steel comprises a multi-layer structure, including Fe–Cr spinel, magnetite and PbFe4O7. A large number of SiO2 nanoparticles with a size of ∼200 nm are observed in FeCr2O4 oxide film. In contrast, for the samples immersing in liquid LBE with 10−8 wt.% oxygen concentration, amorphous SiO2 bands rather than nanoparticles are distributed among Cr2O3 oxides in IOZ. The dense Si-rich oxide film hinders the dissolution corrosion of HLM on austenitic steel. Meanwhile, the low oxygen concentration in LBE suppresses the formation of magnetite and promotes the growth of SiO2 into a more continuous banded oxides than nanoparticles.http://www.sciencedirect.com/science/article/pii/S2238785425012852Lead-bismuth eutecticSi-containing austenitic stainless steelOxygen concentrationCorrosion behaviorAmorphous SiO2 |
| spellingShingle | Hao Ren Xiaoxin Zhang Xian Zeng Xiaodong Huang Decang Zhang Jun Zhang Qingzhi Yan Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBE Journal of Materials Research and Technology Lead-bismuth eutectic Si-containing austenitic stainless steel Oxygen concentration Corrosion behavior Amorphous SiO2 |
| title | Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBE |
| title_full | Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBE |
| title_fullStr | Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBE |
| title_full_unstemmed | Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBE |
| title_short | Microstructural differences of oxide layer on Si-containing austenitic stainless steel exposed to oxygen-saturated and oxygen-poor LBE |
| title_sort | microstructural differences of oxide layer on si containing austenitic stainless steel exposed to oxygen saturated and oxygen poor lbe |
| topic | Lead-bismuth eutectic Si-containing austenitic stainless steel Oxygen concentration Corrosion behavior Amorphous SiO2 |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425012852 |
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