Effect of irradiation damage on hydrothermal corrosion of SiC

Kondo, Sosuke; Lee, Moon-Hee; Hinoki, Tatsuya; Hyodo, Yoshihiro; Kano, Fumihisa

doi:10.1016/j.jnucmat.2015.04.034

Cited by 62 publications

(32 citation statements)

References 32 publications

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“…In recent years a number of studies have shown a clear difference between the corrosion rates of SiC without and with irradiation [7,53,54]. Essentially a substantial increase has been consistently observed when irradiation is present.…”

Section: Effect Of Irradiation On Sic Hydrothermal Corrosion Kineticsmentioning

confidence: 99%

“…The unique role of irradiated microstructure on enhancing corrosion kinetics of SiC is evident from the work of Kondo et al [54], where ion irradiated specimens underwent immersion tests under BWR-NWC conditions in absence of any irradiation. A clear difference in corrosion rate of ion irradiated and unirradiated material was shown in that study.…”

Section: Effect Of Irradiation On Sic Hydrothermal Corrosion Kineticsmentioning

confidence: 99%

“…Also, irradiation can result in development of stress in the material that can accelerate corrosion, with many references available dating back to initial work by Hillig and Charles [57]. The effect of stress should be considered paramount for ion irradiated SiC specimens, where a thin layer of material (a few micrometers) is under stresses on the order of 1 GPa as evident from recent results by Kondo et al [54].…”

Section: Effect Of Irradiation On Sic Hydrothermal Corrosion Kineticsmentioning

confidence: 99%

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Hydrothermal corrosion of SiC in LWR coolant environments in the absence of irradiation

Terrani

Yang

Kim

et al. 2015

Journal of Nuclear Materials

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a b s t r a c tAssessment of the thermodynamics of SiC corrosion under light water reactor coolant environments suggests that silica formation is always expected in the range of applicable pH and potential. Autoclave testing of SiC-based materials in the absence of ionizing radiation was performed. The kinetics data from these tests, when compared with kinetics of silica dissolution in water and post-exposure characterization of SiC samples, suggest that oxidation of SiC to form silica is the rate-limiting step for recession of SiC in high temperature water. Oxygen activity in water was determined to play an important role in SiC recession kinetics. A simplified model of a power loop shows the effect of silica dissolution from the hot region (resembling fuel) and deposition in the cold regions.

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Section: Effect Of Irradiation On Sic Hydrothermal Corrosion Kineticsmentioning

confidence: 99%

Section: Effect Of Irradiation On Sic Hydrothermal Corrosion Kineticsmentioning

confidence: 99%

Section: Effect Of Irradiation On Sic Hydrothermal Corrosion Kineticsmentioning

confidence: 99%

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Hydrothermal corrosion of SiC in LWR coolant environments in the absence of irradiation

Terrani

Yang

Kim

et al. 2015

Journal of Nuclear Materials

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“…Previous studies have reported that preferential intergranular dissolution was a typical phenomenon in the corrosion behavior of sintered SiC under hydrothermal conditions, which depended on the manufacturing routes and the sintering agents . Compared with sintered bulk SiC, the corrosion of CVD‐SiC tends to proceed relatively more uniform because of the higher purity at the grain boundary . In this study, small SiC grains were observed to be dissolved faster than large ones.…”

Section: Discussionmentioning

confidence: 50%

“…8,21,33 Compared with sintered bulk SiC, the corrosion of CVD-SiC tends to proceed relatively more uniform because of the higher purity at the grain boundary. 34 In this study, small SiC grains were observed to be dissolved faster than large ones. This could be related to the larger fractions of grain boundary areas for smaller grains, which makes them to be more susceptible to the reaction with water.…”

Section: Microstructure Of Sic Layers Upon Hydrothermal Corrosionmentioning

confidence: 52%

Effect of hydrothermal corrosion on the fracture strength of SiC layer in tristructural‐isotropic fuel particles

et al. 2019

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The hydrothermal corrosion behavior of SiC layer in tristructural‐isotropic (TRISO) fuel particles and its effect on the fracture strength were investigated. The corrosion test was performed using the static autoclave at 400°C/10.3 MPa. The SiC layer exhibited a thickness loss and the corrosion rate followed a linear law. During corrosion, carbon was formed on the SiC surface due to the loss of Si. The corrosion was found preferentially occurred at the grain boundary of SiC, leading to the grain detachment and pit formation. The rate determining step of the corrosion was SiO2 formation rather than SiO2 dissolution in the hydrothermal environment. The fracture strength of SiC shell after corrosion was evaluated using the crush test. It showed a slight decrease with an increase in corrosion time, due to the thickness reduction in SiC layer. The results of this study demonstrated that the SiC in TRISO particles has good corrosion resistance in the hydrothermal environment.

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Preliminary Characterization and Projections of PVD Coatings On SiC Cladding for Light Water Reactors

Ang

Carpenter

Terrani

et al. 2019

Proceeding of the 42nd International Conference on Advanced Ceramics and Composites

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Effect of irradiation damage on hydrothermal corrosion of SiC

Cited by 62 publications

References 32 publications

Hydrothermal corrosion of SiC in LWR coolant environments in the absence of irradiation

Hydrothermal corrosion of SiC in LWR coolant environments in the absence of irradiation

Effect of hydrothermal corrosion on the fracture strength of SiC layer in tristructural‐isotropic fuel particles

Preliminary Characterization and Projections of PVD Coatings On SiC Cladding for Light Water Reactors

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