High Thermal Conductivity SiC/SiC Composites for Fusion Applications
نویسندگان
چکیده
SiC-SiC composites offer excellent potential for fusion energy as well as numerous commercial applications. High manufacturing cost and very low through-the-thickness (transverse) thermal conductivity (below 15 W/mK) hinders wider applications of SiC/SiC composites. To overcome these obstacles, a low-cost, Chemical Vapor Reaction (CVR) process was developed to fabricate crystalline, high purity SiC fibers. Several variations of the CVR process were used to fabricate SiC/SiC composites. An unirradiated, 4 mm thick SiC/SiC composite was completely CVRconverted from a converted SiC fiber preform with a pitch graphite matrix, and exhibited a bulk density of 2.65 g/cc, 10% open porosity, RT and 1000C thermal conductivity values of 70 and 35 W/mK, respectively, and a RT bend strength of 200 MPa.
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