文献类型：期刊文献

英文题名：A Novel Oxidation Resistant SiC/B4C/C Nanocomposite Derived from a Carborane-Containing Conjugated Polycarbosilane

作者：Wang, Canfeng[1];Huang, Farong[1];Jiang, Yun[1];Zhou, Yan[1];Du, Lei[1]

机构：[1]E China Univ Sci & Technol, Key Lab Specially Funct Polymer Mat & Related Tec, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：95

期号：1

起止页码：71

外文期刊名：JOURNAL OF THE AMERICAN CERAMIC SOCIETY

收录：;EI(收录号：20120214669077);WOS:【SCI-EXPANDED(收录号:WOS:000298735300014)】；

基金：This work was supported by the Shanghai Leading Academic Discipline Projects (B502).

语种：英文

外文关键词：High resolution transmission electron microscopy - Polysilanes - Pyrolysis - Nanocomposites - Carbon - Ceramic materials - Oxidation resistance - Thermogravimetric analysis - Boron carbide - Nanocrystals - X ray diffraction

摘要：A novel oxidation resistant SiC/B4C/C nanocomposite was prepared by the pyrolysis of carborane-containing poly(silyleneethynylenephenyleneethynylene) (CB-PSEPE) at 1450 degrees 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 beta-SiC (similar to 12 similar to nm) and B4C (similar to 20 similar to nm) nanocrystalline phases were formed during the pyrolysis process of CB-PSEPE. The presence of boron in CB-PSEPE promotes the growth of beta-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.