Abstract
The fabrication methods and requirements of the fiber, interphase, and matrix of nuclear grade SiC f /SiC composites are briefly reviewed. A CVI-processed SiC f /SiC composite with a PyC or (PyC-SiC)n interphase utilizing Hi-Nicalon Type S or Tyranno SA3 fiber is currently the best combination in terms of the irradiation performance. We also describe important material issues for the application of SiC composites to LWR fuel cladding. The kinetics of the SiC corrosion under LWR conditions needs to be clarified to confirm the possibility of a burn-up extension and the cost-benefit effect of the SiC composite cladding. In addition, the development of end-plug joining technology and fission products retention capability of the ceramic composite tube would be key challenges for the successful application of SiC composite cladding.
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