Journal
THERMOCHIMICA ACTA
Volume 619, Issue -, Pages 16-19Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.tca.2015.09.020
Keywords
Thermal conductivity; Silica sol; Carbon fiber; Silicon carbide; Epoxy composite
Funding
- World Premier Materials Program (Development of High Heat-dissipation Nanocomposite for Energy Saving) - Ministry of Trade, Industry and Energy (MOTIE, Korea) [10037890]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10037890] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Silicon carbide (SiC) coating on pitch-based carbon fiber (SiC/pitch-CF) was prepared by the carbonization of a SiO2 coating layer onto pitch-CF. SiO2 sol and pitch-CF were mixed together and carbonized in a furnace under argon. The effect of the SiC coating on the thermal properties of pitch-CF was investigated. The thermal conductivity of the SiC/pitch-CF-epoxy composite was measured using the laser flash method. Because of the increase in the contact point of pitch-CF owing to the formation of particulate SiC, the thermal conductivity of SiC/pitch-CF was 38% higher than that of uncoated pitch-based CF when compared with epoxy composites comprising 60 wt% filler loading. However, the thermal conductivity of an epoxy composite comprising SiC/microwave-treated pitch-CF (SiC/M.pitch-CF) was lower than that of the pitch-CF-epoxy composite because of the defects resulting from acid treatment, even though the coating layer was fully covered and uniform compared microwave untreated pitch-CF. (C) 2015 Published by Elsevier B.V.
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