|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||Nanostructured Vanadium Carbide Coating on the F/M Stainless Steel for Mitigating Fuel Cladding Chemical Interaction
||Kookhyun Jeong, Yong Yang
|On-Site Speaker (Planned)
Fuel cladding chemical interaction (FCCI) has long been acknowledged as a critical issue for a metallic fuel/steel cladding system. In this study, a low temperature CVD system was developed for depositing a nanostructured vanadium carbide thin layer on the HT-9 substrates and inner surface of thin wall cladding tubes. Vanadocene was used as the organic precursor, and the deposition temperature was optimized at 550oC. The average grain size of vanadium carbide coating was controlled to ~300nm, and a coating thickness of up to 5μm was readily obtained. No detrimental effects such as decarburization, significant grain growth, were observed in the coated HT9 substrate. Diffusion couple experiments were performed to study the interdiffusion between cerium/neodymium and HT9 cladding steel. SEM/EDS and STEM/EDS were used to characterize the compositional profile across the coating layer. Vanadium carbide has demonstrated to effectively eliminate the interdiffusion between fission products (or fuels) and ferritic/martensitic cladding steel.
||Planned: A print-only volume