Synthesis of ZrCSiC Powders by a Preceramic Solution Route

Authors

  • Tao Cai,

    1. Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing, China
    2. Graduate University of Chinese Academy of Science, Beijing, China
    Search for more papers by this author
  • Wen-Feng Qiu,

    1. Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing, China
    Search for more papers by this author
  • Dan Liu,

    1. Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing, China
    Search for more papers by this author
  • Wei-Jian Han,

    1. Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing, China
    Search for more papers by this author
  • Li Ye,

    1. Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing, China
    Search for more papers by this author
  • Ai-Jun Zhao,

    1. Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing, China
    Search for more papers by this author
  • Tong Zhao

    Corresponding author
      • Laboratory of Advanced Polymer Materials, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Science, Beijing, China
      Search for more papers by this author

    Author to whom correspondence should be addressed. e-mail: tzhao@iccas.ac.cn

    Abstract

    Homogenous liquid precursor for ZrCSiC was prepared by blending of Zr(OC4H9)4 and Poly[(methylsilylene)acetylene]. This precursor could be cured at 250°C and converted into binary ZrCSiC composite ceramics upon heat treatment at 1700°C. The pyrolysis mechanism and optimal molar ratio of the precursor were investigated by XRD. The morphology and elements analyses were conducted by SEM and corresponding energy-dispersive spectrometer. The evolution of carbon during ceramization was studied by Raman spectroscopy. The results showed that the precursor samples heat treated at 900°C consisted of t-ZrO2 (main phase) and m-ZrO2 (minor phase). The higher temperature induced phase transformation and t-ZrO2 converted into m-ZrO2. Further heating led to the formation of ZrC and SiC due to the carbothermal reduction, and the ceramic sample changed from compact to porous due to the generation of carbon oxides. With the increasing molar ratios of C/Zr, the residual oxides in 1700°C ceramic samples converted into ZrC and almost pure ZrCSiC composite ceramics could be obtained in ZS-3 sample. The Zr, Si, and C elements were well distributed in the obtained ceramics powders and particles with a distribution of 100 ~ 300 nm consisted of well-crystallized ZrC and SiC phases.

    Ancillary