Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebbles
In this study, corrosion behavior of F82H reduced activation ferritic/martensitic steel (RAFM) by LTZO (Li2+xTiO3+y solid solution with 20 wt% Li2ZrO3) ceramic breeder pebbles was investigated at 773–998 K in an inert sweep gas condition (Ar + 0.1 % H2). Due to vapor gas release from the breeder peb...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179125000158 |
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| author | Kosuke Kataoka Keisuke Mukai Juro Yagi Motoki Nakajima Jae-Hwan Kim Takashi Nozawa |
| author_facet | Kosuke Kataoka Keisuke Mukai Juro Yagi Motoki Nakajima Jae-Hwan Kim Takashi Nozawa |
| author_sort | Kosuke Kataoka |
| collection | DOAJ |
| description | In this study, corrosion behavior of F82H reduced activation ferritic/martensitic steel (RAFM) by LTZO (Li2+xTiO3+y solid solution with 20 wt% Li2ZrO3) ceramic breeder pebbles was investigated at 773–998 K in an inert sweep gas condition (Ar + 0.1 % H2). Due to vapor gas release from the breeder pebbles and those penetrations, corrosion layer formed on the surface of the F82H steel. Glow discharge optical emission spectroscopy (GD-OES) and X-ray diffraction (XRD) identified the corrosion products as cubic, spinel, and rhombohedral Li–TM–O (TM: transition element in F82H such as Fe, Cr, and Mn). The growth of the corrosion layer thickness followed a parabolic curve at 833 K, yielding apparent diffusion coefficient of D = 6.95 × 10–13 cm2/s. Rapid growth was observed at 993 K after a parabolic growth which could be triggered by failure of the protective layer. A comparative analysis indicates a predominant effect of humidity and oxygen in the sweep gas on the growth rate, while the composition and shape of breeding materials have minor impacts. |
| format | Article |
| id | doaj-art-8ee6328a723d42ca8254a23b74f4e939 |
| institution | OA Journals |
| issn | 2352-1791 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-8ee6328a723d42ca8254a23b74f4e9392025-08-20T02:04:33ZengElsevierNuclear Materials and Energy2352-17912025-03-014210187510.1016/j.nme.2025.101875Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebblesKosuke Kataoka0Keisuke Mukai1Juro Yagi2Motoki Nakajima3Jae-Hwan Kim4Takashi Nozawa5Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, JapanGraduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan; National Institute for Fusion Science, National Institutes of Natural Science, Toki, Gufu 509-5292, Japan; The Graduate University for Advanced Studies, SOKENDAI, Toki, Gifu 509-5292, Japan; Corresponding author at: Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, Japan.Graduate School of Energy Science, Kyoto University, Uji, Kyoto 611-0011, JapanNational Institutes for Quantum Science and Technology, Rokkasho, Aomori, JapanNational Institutes for Quantum Science and Technology, Rokkasho, Aomori, JapanNational Institutes for Quantum Science and Technology, Rokkasho, Aomori, JapanIn this study, corrosion behavior of F82H reduced activation ferritic/martensitic steel (RAFM) by LTZO (Li2+xTiO3+y solid solution with 20 wt% Li2ZrO3) ceramic breeder pebbles was investigated at 773–998 K in an inert sweep gas condition (Ar + 0.1 % H2). Due to vapor gas release from the breeder pebbles and those penetrations, corrosion layer formed on the surface of the F82H steel. Glow discharge optical emission spectroscopy (GD-OES) and X-ray diffraction (XRD) identified the corrosion products as cubic, spinel, and rhombohedral Li–TM–O (TM: transition element in F82H such as Fe, Cr, and Mn). The growth of the corrosion layer thickness followed a parabolic curve at 833 K, yielding apparent diffusion coefficient of D = 6.95 × 10–13 cm2/s. Rapid growth was observed at 993 K after a parabolic growth which could be triggered by failure of the protective layer. A comparative analysis indicates a predominant effect of humidity and oxygen in the sweep gas on the growth rate, while the composition and shape of breeding materials have minor impacts.http://www.sciencedirect.com/science/article/pii/S2352179125000158Nuclear fusionBreeding blanketTritium breederCompatibilityCorrosion |
| spellingShingle | Kosuke Kataoka Keisuke Mukai Juro Yagi Motoki Nakajima Jae-Hwan Kim Takashi Nozawa Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebbles Nuclear Materials and Energy Nuclear fusion Breeding blanket Tritium breeder Compatibility Corrosion |
| title | Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebbles |
| title_full | Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebbles |
| title_fullStr | Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebbles |
| title_full_unstemmed | Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebbles |
| title_short | Corrosive behavior of structural F82H RAFM steel by LTZO ceramic breeder pebbles |
| title_sort | corrosive behavior of structural f82h rafm steel by ltzo ceramic breeder pebbles |
| topic | Nuclear fusion Breeding blanket Tritium breeder Compatibility Corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2352179125000158 |
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