Air oxidation of SiC fibers prepared from carbon fibers and SiO vapor

Air oxidation of SiC fibers prepared from carbon fibers and SiO vapor

Activated carbon fiber composite (ACFC) was reacted with SiO vapor to prepare SiC fibers containing nanopores. The SiC fibers obtained were not oxidation resistant, showing nearly complete oxidation at 1000°C after about 25 hr in air, though the oxidation product was amorphous silica which was gener...

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Veröffentlicht in:Metals and materials international 2003-06, Vol.9 (3), p.299-302
Hauptverfasser: Lee, Dong-Bok, Shim, Woung-Shik, Jang, Jin Sik, Lee, Jae Chun
Format: Artikel
Sprache:eng
Schlagworte:
Activated carbon
Carbon fibers
Fiber composites
Fibers
Nanocomposites
Nanomaterials
Nanostructure
Oxidation
Oxidation resistance
Silicon carbide
Silicon dioxide
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Zusammenfassung:Activated carbon fiber composite (ACFC) was reacted with SiO vapor to prepare SiC fibers containing nanopores. The SiC fibers obtained were not oxidation resistant, showing nearly complete oxidation at 1000°C after about 25 hr in air, though the oxidation product was amorphous silica which was generally considered to be oxidation resistant. The poor oxidation resistance was attributed to highly porous, amorphous SiO2 formation on the inherently highly porous SiC fibers. Interconnected micropores inside the fibers rendered the fibers easily oxidizable.
ISSN:1598-9623
2005-4149
DOI:10.1007/BF03027050