Potential source of carbon contamination in U-Zr melt processed in Y2O3-plasma-spray-coated graphite
| Autor: | Seong-Jun Ha, Young-Kook Lee, Kyung-Chai Jeong, Jeong-Yong Park, Seoung-Woo Kuk |
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| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Alloy 02 engineering and technology engineering.material Contamination 021001 nanoscience & nanotechnology 01 natural sciences Casting 010305 fluids & plasmas Matrix (geology) Metal Nuclear Energy and Engineering Coating Chemical engineering visual_art 0103 physical sciences engineering visual_art.visual_art_medium General Materials Science Graphite 0210 nano-technology Thermal spraying |
| Zdroj: | Journal of Nuclear Materials. 547:152810 |
| ISSN: | 0022-3115 |
| Popis: | This study investigated carbon contamination in U-10wt.%Zr metallic fuel in the casting process based on the interaction between the U-Zr alloy melt and the Y2O3-plasma-spray-coated graphite. During the injection casting of U-10wt.%Zr, a ZrC reaction layer was found to form at the interface between the U-Zr melt and the Y2O3-plasma-coated graphite crucible. ZrC inclusions were also found in the matrix of the melt residue. This C contamination, evidenced by the formation of ZrC, is attributed to the migration of C through the Y2O3 coating from the graphite crucible. The results of TGA experiments using a Y2O3-plasma-coated graphite sample suggest that CO is produced by a reaction between Y2O3 and graphite at temperatures above 1773 K, which then migrates through defects in the coating to react with Zr in the U-Zr melt. |
| Databáze: | OpenAIRE |
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