Get access

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

Authors

  • Canfeng Wang,

    1. Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, Shanghai, China
    Search for more papers by this author
  • Farong Huang,

    Corresponding author
    • Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, Shanghai, China
    Search for more papers by this author
  • Yun Jiang,

    1. Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, Shanghai, China
    Search for more papers by this author
  • Yan Zhou,

    1. Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, Shanghai, China
    Search for more papers by this author
  • Lei Du

    1. Key Laboratory of Specially Functional Polymeric Materials and Related Technology of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology, Shanghai, China
    Search for more papers by this author

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

Author to whom correspondence should be addressed. e-mail: fhuanglab@ecust.edu.cn

Abstract

A novel oxidation resistant SiC/B4C/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 B4C (~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.

Ancillary