Factors affecting the hydrothermal corrosion behavior of chemically vapor deposited silicon carbides

The hydrothermal corrosion behavior of chemical-vapor-deposited SiC was investigated for application as nuclear fuel cladding in a pressurized water reactor (PWR). This paper presented the effect of grain size, stacking fault, electrical conductivity, and electrochemical properties on the hydrotherm...

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Bibliographic Details
Published in:Journal of nuclear materials 2019-05, Vol.518, p.350-356
Main Authors: Shin, Jung Ho, Kim, Daejong, Lee, Hyeon-Geun, Park, Ji Yeon, Kim, Weon-Ju
Format: Article
Language:English
Subjects:
Chemical vapor deposition
Corrosion
Electrical conductivity
Electrical resistivity
Electrochemical analysis
Electrochemistry
Grain size
Nuclear energy
Nuclear fuel elements
Organic chemistry
Pressurized water reactors
Radioactive wastes
Silicon carbide
Silicon dioxide
Stacking faults
Vapors
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Summary:The hydrothermal corrosion behavior of chemical-vapor-deposited SiC was investigated for application as nuclear fuel cladding in a pressurized water reactor (PWR). This paper presented the effect of grain size, stacking fault, electrical conductivity, and electrochemical properties on the hydrothermal corrosion behavior of the CVD SiC in a simulated PWR water loop at 360 °C and 18.5 MPa. The hydrothermal corrosion of SiC was strongly influenced by electrical conductivity. It was revealed that high electrical conductivity leads to high exchange current density, which allows SiO2/Si(OH)4 to form easily on the SiC surface, allowing it to dissolve rapidly in the hydrothermal environment.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2019.03.026