Abstract
SiC and its composites have been considered for use as nuclear fuel cladding materials of pressurized light water reactors. In this study, a SiC f /SiC composite as a constituent layer of SiC triplex fuel cladding was fabricated using a chemical vapor infiltration (CVI) process in which tubular SiC fiber preforms were prepared using a filament winding method. To enhance the matrix density of the composite layer, winding patterns, deposition temperature, and gas input ratio were controlled. Fiber arrangement and porosity were the main parameters influencing densification behaviors. Final density of the composites decreased as the SiC fiber volume fraction increased. The CVI process was optimized to densify the tubular preforms with high fiber volume fraction at a high H2/MTS ratio of 20 at 1000℃; in this process, surface canning of the composites was effectively retarded.
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