Effect of oxygen on the corrosion of SiC in LiF–NaF–KF molten salt

Yang, Xinmei; Liu, Min; Gao, Yantao; Zhang, Dongsheng; Feng, Song; Liu, Huajian; Yu, Ge; Wang, Guozhong; Wang, Mouhua; Xiao-Hong, Zhou; Xia, Hao; Huai, Ping; Sham, Tsun‐Kong; Wang, Jianqiang; Guo, Jinghua

doi:10.1016/j.corsci.2015.11.014

Cited by 46 publications

(6 citation statements)

References 31 publications

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“…For C 1s peaks (Figure C), significant differences between the as‐deposited specimen and the corroded specimens were observed. The C 1s peaks of the as‐deposited specimen can be distinguished by three peaks, which were observed at 282.5, 284.08, and 286.48 eV correspond to the existence of SiC, SiO x C y , and surface absorption impurity(C–O/C–H), respectively . After 3 days of corrosion, the peak belonging to the C–O–Si bond of SiO x C y centered at 284.08 eV disappeared while a new peak was formed at 284.6 eV, which can be attributed to the C–C bond of carbon.…”

Section: Resultsmentioning

confidence: 99%

“…The C 1s peaks of the as-deposited specimen can be distinguished by three peaks, which were observed at 282.5, 284.08, and 286.48 eV correspond to the existence of SiC, SiOxCy, and surface absorption impurity(C-O/C-H), respectively. 24,25 After 3 days of corrosion, the peak belonging to the C-O-Si bond of SiOxCy centered at 284.08 eV disappeared while a new peak was formed at 284.6 eV, which can be attributed to the C-C bond of carbon. The results suggested the formation of a carbon-rich surface due to the loss of Si from the SiC layer, which is consistent with the Raman analyses.…”

Section: Phase Analysis Of Sic Layers After Corrosionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Phase Analysis Of Sic Layers After Corrosionmentioning

confidence: 99%

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

et al. 2019

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“…The purest SiC was corroded slightly by oxygen impurities in the FLiNaK. Singlecrystal SiC and very high-purity CVD SiC (0.999995 %) were only slightly corroded in FLiNaK at 700°C for 10 and 45 days [77]. XPS elemental surface technique was used to detect oxygen and Si 3+ oxidation states on the corroded samples.…”

Section: Sic and Intrinsic Oxidantsmentioning

confidence: 99%

SiC/SiC Composites Technology Gap Analysis for Molten Salt Reactors

Geringer

Katoh

Koyanagi

et al. 2018

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“…Meanwhile, several investigators have conducted investigations on the compatibility between SiC and molten salt. Yang et al 29 . demonstrated that SiC, which contained a significant amount of oxygen impurities, corroded severely in molten FLiNaK salt, whereas high‐purity SiC exhibited only slight corrosion.…”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, several investigators have conducted investigations on the compatibility between SiC and molten salt. Yang et al 29 demonstrated that SiC, which contained a significant amount of oxygen impurities, corroded severely in molten FLiNaK salt, whereas high-purity SiC exhibited only slight corrosion. Espinoza-Perez et al 30 revealed that the microstructure of SiC plays a pivotal role in its corrosion behavior in molten salts, as a lower percentage of HAGBs leads to a decreased corrosion rate.…”

Section: Introductionmentioning

confidence: 99%

Influence of SiC content in B₄C–nSiC composites corrosion in molten FLiNaK salt at 800°C

Wang,

Jia,

Chen

et al. 2024

Int J Applied Ceramic Tech

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The present study investigates the influences of SiC incorporation on the microstructure and corrosion behavior of B4C–nSiC composites in molten FLiNaK salt at 800°C. The corrosion characteristics and mechanisms of B4C–nSiC composites in molten FLiNaK salt were thoroughly characterized and extensively discussed. The B4C–nSiC composites exhibited a more refined grain size and lowered apparent porosity as the SiC content increased. Additionally, the concentration of high‐angle grain boundaries (HAGBs) in B4C–nSiC composites increased as the SiC content increased. The incorporation of 10 wt.% SiC improved the corrosion resistance of B4C–nSiC composites against molten FLiNaK salt. However, the incorporation of excessive SiC (≥20 wt.%) did not improve the corrosion resistance. The best corrosion resistance of B4C–10% SiC ceramic composite was attributed, on the one hand, to its relatively low apparent porosity and the low concentration of HAGBs with high structural disorder. On the other hand, the selective corrosion of B4C in B4C–10% SiC ceramic composite rapidly formed a sufficiently thick and highly graphitized C‐rich layer on its surface during the initial stages of the corrosion test. The C‐rich layer maintained the integral structure of the ceramic and prevented subsequent corrosive medium from penetrating into the ceramic.

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Effect of oxygen on the corrosion of SiC in LiF–NaF–KF molten salt

Cited by 46 publications

References 31 publications

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

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

SiC/SiC Composites Technology Gap Analysis for Molten Salt Reactors

Influence of SiC content in B₄C–nSiC composites corrosion in molten FLiNaK salt at 800°C

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Effect of oxygen on the corrosion of SiC in LiF–NaF–KF molten salt

Cited by 46 publications

References 31 publications

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

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

SiC/SiC Composites Technology Gap Analysis for Molten Salt Reactors

Influence of SiC content in B4C–nSiC composites corrosion in molten FLiNaK salt at 800°C

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Product

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Influence of SiC content in B₄C–nSiC composites corrosion in molten FLiNaK salt at 800°C