A study on the synergetic effect of electronic excitation/dislocation damage by in-situ measurement method under irradiation
| Project/Area Number |
21J13575
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Single-year Grants |
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| Section | 国内 |
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| Review Section |
Basic Section 31010:Nuclear engineering-related
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| Research Institution | Kyushu University |
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Principal Investigator |
SEO POOREUN 九州大学, 工学府, 特別研究員(DC2)
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| Project Period (FY) |
2021-04-28 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2022: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2021: ¥800,000 (Direct Cost: ¥800,000)
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| Keywords | Ceramic oxides / Irradiation / Point defect / HVEM / Radiation damage / Nuclear material / Cathodoluminescence |
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| Outline of Research at the Start |
Synergetic effect of inelastic electron and elastic nuclei energy loss is a key factor of nanostructure evolution and defect kinetics in ceramics such as ceria Gd doped ceria (GDC). For the charge neutrality in ceria and GDC due to trivalent and tetravalent ions substation in the ceramics, the oxygen vacancies are formed and physical properties, such as thermal conductivity, diffusivity are changed. In this study the charge state of defects in ceria and GDC are evaluated by in-situ CL, PL and Raman method under irradiation conditions.
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| Outline of Annual Research Achievements |
Gd2O3 doped CeO2 (GDC)is a fluorite sturcture which is a radiation-resistant oxides. This oxide can be a substitute of the nuclear fuel, such as (U,Gd)O2.GDC has nature oxygen vacancies (VOs) generated by reduction of CeO2-x or substitution of Gd3+ ion to Ce4+ ion site, resulting in a cooperative impact that aids in the restoration of radiation damage.The GDC is examined by varying Gd dopant concentration, and they were exposed to heavy ions at high ion fluences to determine the impact of VOs and its stuructue evaluation.To assess the extent of disordering caused by these factors, both virgin and irradiated samples were analyzed on long- and medium-range scales, and images of the affected areas were examined using TEM.In-situ cathodoluminescence spectroscopy under high-energy electron irradiation were also analyzed to determine the charge states of VOs in the beam condition.
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| Research Progress Status |
令和4年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和4年度が最終年度であるため、記入しない。
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Report
(2 results)
Research Products
(8 results)
