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Vol.49, No.7, 549 ~ 557, 2011
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| Title |
| Effect of Vapor Deposition on the Interdiffusion Behavior between the Metallic Fuel and Clad Material |
| 김준환 Jun Hwan Kim , 이병운 Byoung Oon Lee , 이찬복 Chan Bock Lee , 지승현 Seung Hyun Jee , 윤영수 Young Soo Yoon |
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| Abstract |
| This study aimed to evaluate the performance of diffusion barriers in order to prevent fuel-cladding chemical interaction (FCCI) between the metallic fuels and the cladding materials, a potential hazard for nuclear fuel in sodium-cooled fast reactors. In order to prevent FCCI, Zr or V metal is deposited on the ferriticmartensitic stainless steel surface by physical vapor deposition with a thickness up to 5㎛. The diffusion couple tests using uranium alloy (U-10Zr) and a rare earth metal such as Ce-La alloy and Nd were performed at temperatures between 660~800℃. Microstructural analysis using SEM was carried out over the coupled specimen. The results show that significant interdiffusion and an associated eutectic reaction ocurred in the specimen without a diffusion barrier. However, with the exception of the local dissolution of the Zr layer in the Ce-La alloy, the specimens deposited with Zr and V exhibited superior eutectic resistance to the uranium alloy and rare earth metal. |
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| Key Words |
| metals, vapor deposition, diffusion, scamning electron microscopy, eutectic |
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