首页|Phase decomposition of oxide film of flow accelerated corroded F82H steel under high-temperature iron irradiation
Phase decomposition of oxide film of flow accelerated corroded F82H steel under high-temperature iron irradiation
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NSTL
Elsevier
The purpose of the present study is to clarify the phase stability of the corroded layer in reduced activa-tion ferritic/martensitic steels under irradiation. The oxide film of F82H steel was subjected to ion irra-diation using 2.8 MeV-Fe2+ at 573 K. For post-irradiation experiments, grazing incident X-ray diffraction (GIXRD) and Raman analysis were conducted to clarify the features of the oxide layer with the variation of the irradiation dose. The dominant phase of the oxide film was identified as FeCr2O4, which co-existed with up to-30% of the residual matrix phase. The fraction of the residual matrix decreased as the irradi-ation dose increased, the phase transformation from FeCr(2)O(4)to Fe3O4 was confirmed. The hypothesis for the phase transformation of FeCr(2)O(4)to to Fe3O4 under irradiation was proposed based on the experimental results. Specifically, the FeCr(2)O(4)to phase is unstable under irradiation, and tends to become stable after ab-sorbing Fe atoms from the residual matrix in the corrosion layer. As a result, the Fe concentration in the oxide layer increased under irradiation, the phase transformation of FeCr(2)O(4)to to Fe3O4 is presumed under irradiation. However, concerns about the mechanism of the instability of FeCr2O4 under irradiation, and better stability of Fe3O4 phase relative to FeCr2O4 phase have to be further considered to achieve a better understanding. (c) 2022 Elsevier B.V. All rights reserved.
Ion irradiationFlow accelerated corrosionOxideFeCr2O4Fe 3 O 4GIXRDF82HACTIVATION FERRITIC/MARTENSITIC STEELINSTABILITYOXIDATIONELECTRON
NSTL
Elsevier
