Premium
A Novel Oxidation Resistant SiC/B 4 C/C Nanocomposite Derived from a Carborane‐Containing Conjugated Polycarbosilane
Author(s) -
Wang Canfeng,
Huang Farong,
Jiang Yun,
Zhou Yan,
Du Lei
Publication year - 2012
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04972.x
Subject(s) - nanocomposite , materials science , nanocrystalline material , chemical engineering , ceramic , pyrolysis , raman spectroscopy , thermogravimetric analysis , nanotechnology , composite material , physics , optics , engineering
A novel oxidation resistant SiC/B 4 C/C nanocomposite was prepared by the pyrolysis of carborane‐containing poly(silyleneethynylenephenyleneethynylene) ( CB ‐ PSEPE ) at 1450°C in argon. The phase composition and microstructure of the carbon‐rich ceramic were investigated by X‐ray diffraction, Raman spectroscopy and transmission electron microscopy. The β‐ SiC (~12 nm) and B 4 C (~20 nm) nanocrystalline phases were formed during the pyrolysis process of CB ‐ PSEPE . The presence of boron in CB ‐ PSEPE promotes the growth of β‐ SiC nanocrystals. The ceramic shows excellent thermooxidative stability based on thermogravimetric analysis in air. A borosilicate layer was formed on the surface of the ceramic after oxidation. This carborane‐containing conjugated polycarbosilane could be a potential precursor for oxidation resistant carbon‐based materials.