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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제50권 제5호
발행연도
2018.1
수록면
724 - 730 (7page)

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Chromium and chromium nitride were selected as potential barriers to prevent fuel-clad chemicalinteraction (FCCI) between the cladding and the fuel material. In this study, ferritic/martensitic HT-9 steeland misch metal were used to simulate the reaction between the cladding and fuel fission product,respectively. Radio frequency magnetron sputtering was used to deposit Cr and CrN films onto thecladding, and the gas flow rates of argon and nitrogen were fixed at certain values for each sample tocontrol the deposition rate and the crystal structure of the films. The samples were heated for 24 h at933 K through the diffusion couple test, and considerable amount of interdiffusion (max. thickness:550 mm) occurred at the interface between HT-9 and misch metal when the argon and nitrogen wereused individually. The elemental contents of misch metal were detected at the HT-9 through energydispersive X-ray spectroscopy due to the interdiffusion. However, the specimens that were sputtered bymixed gases (Ar and N2) exhibited excellent resistance to FCCI. The thickness of these CrN films were only4 mm, but these films effectively prevented the FCCI due to their high adhesion strength (frictional force1,200 mm) and dense columnar microstructures.

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