High thermal conductivity SiC/SiC composites for fusion applications
Autor: | W. Kowbel, G.E. Youngblood, K.L Tsou, C. Bruce, J.C. Withers, K Patel |
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Rok vydání: | 2000 |
Předmět: | |
Zdroj: | Journal of Nuclear Materials. :570-573 |
ISSN: | 0022-3115 |
DOI: | 10.1016/s0022-3115(00)00213-0 |
Popis: | 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/m K) 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 CVR-converted from a converted SiC fiber preform with a pitch graphite matrix, and exhibited a bulk density of 2.65 g/cc, 10% open porosity, room temperature (RT) and 1000°C thermal conductivity values of 70 and 35 W/m K, respectively, and an RT bend strength of 200 MPa. |
Databáze: | OpenAIRE |
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