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학술저널
저자정보
Singh Akash (Metallurgy & Materials Group Indira Gandhi Centre for Atomic Research) Thirumurugesan R. (Metallurgy & Materials Group Indira Gandhi Centre for Atomic Research) Krishnakumar S. (Reactor Design and Technology Group Indira Gandhi Centre for Atomic Research Centre) Rani Revati (Materials Science Group Indira Gandhi Centre for Atomic Research Kalpakkam) Chandramouli S. (Reactor Design and Technology Group Indira Gandhi Centre for Atomic Research Centre) Parameswaran P. (Formerly with Metallurgy & Materials Group Indira Gandhi Centre for Atomic Research) Mythili R. (Metallurgy & Materials Group Indira Gandhi Centre for Atomic Research)
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제55권 제4호
발행연도
2023.4
수록면
1,468 - 1,475 (8page)
DOI
10.1016/j.net.2022.12.019

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Enhancement of wear resistance of components used in fast reactors is necessary for long service life of the components. Plasma nitriding is a promising surface modification technology to impart high hardness and improved wear resistance of various steel components. This study discusses the characterization of chrome nitrided SS316L casing ring used in secondary sodium pump of fast breeder reactor and its stability under long term sodium exposure. Microstructural and hardness analysis showed that stress relieved component could be chrome nitrided successfully to a thickness of about 100 μm. Assessment of in-sodium performance of the chrome nitrided casing ring subjected to long term exposure up to 5000h at 550°C, showed retention of chrome nitrided layer with a case depth almost similar to that before sodium exposure. A slight decrease in the hardness was observed due to prolonged high temperature sodium exposure. Tribological studies indicate very low coefficient of friction indicating the retention of good wear resistance of the coating even after long term sodium exposure.

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