Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7963319 | Journal of Nuclear Materials | 2018 | 28 Pages |
Abstract
FeCrAl-ODS ferritic steels with Ce-oxide dispersion instead of Y-oxide were produced for the accident tolerant fuel cladding of the light water reactor. Excess oxygen (Ex.O) was added to improve the mechanical property. The tensile strength at Ex.Oâ¯=â¯0 is around 200â¯MPaâ¯at 700â¯Â°C, mainly owing to dispersed Ce2O3 particles in less than 10â¯nm size. The formation of the fine Ce2O3 particles is dominated by a coherent interface with ferritic matrix. With increasing Ex.O, an increased of number density of coarser Ce-Al type oxide particles over 10â¯nm size is responsible for the improvement of the tensile strength. Change of the type of oxide particle, CeO2, Ce2O3, CeAlO3, Al2O3, in FeCrAl-ODS steel was thermodynamically analyzed as a parameter of Ex.O.
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Physical Sciences and Engineering
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Nuclear Energy and Engineering
Authors
Hiroki Shibata, Shigeharu Ukai, Naoko H. Oono, Kan Sakamoto, Mutsumi Hirai,