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Effects of heat-treatment temperature on carbon-based composites with added illite
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  • Journal title : Carbon letters
  • Volume 12, Issue 2,  2011, pp.95-101
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2011.12.2.095
 Title & Authors
Effects of heat-treatment temperature on carbon-based composites with added illite
Jeong, Eui-Gyung; Kim, Jin-Hoon; Lee, Young-Seak;
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 Abstract
To investigate new applications for illite as an additive for carbon-based composites, the composites were prepared with and without illite at different heat-treatment temperatures. The effects of the heat-treatment temperature on the chemical structure, microstructure, and thermal oxidation properties of the resulting composites were studied. As the heat-treatment temperature was increased, silicon carbide SiC formation via carbothermal reduction increased until all the added illite was consumed in the case of the samples heat-treated at . This is attributed to the intimate contact between the in the illite and the phenol carbon precursor or the carbon fibers of the preform. Among composites prepared at all temperatures, those with illite addition exhibited fewer pores, voids, and interfacial cracks, resulting in larger bulk densities and lower porosities. A delay of oxidation was not observed in the illite-containing composites prepared at , suggesting that the illite itself absorbed energy for exfoliation or other physical changes. Therefore, if the illite-containing C/C composites can reach a density generally comparable to that of other C/C composites, illite may find application as a filler for C/C composites. However, in this study, the illite-containing C/C composites exhibited low density, even when prepared at a high heat-treatment temperature of , although the thermal oxidation of the resulting composites was improved.
 Keywords
C/C composites;illite;thermal oxidation;heat treatment;
 Language
English
 Cited by
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