Effects of structural differences in starting materials on the formation behavior of cubic silicon nitride by shock compression

Yusuke Yamamoto, Hirotaka Yokota, Natsuko Kojima, Shigenobu Hayashi, Takamichi Kobayashi, Toshimori Sekine, Yoshiyuki Sugahara

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Abstract

Cubic silicon nitride (c-Si3N4) was prepared at 37-38 GPa and ∼1773K by shock compression of residues of polysilazane, perhydropolysilazane (PHPS), pyrolyzed at 873, 1073 and 1273K for 2 h. The residues pyrolyzed at 873 and 1073K were amorphous materials, while the residue pyrolyzed at 1273K consisted mainly of crystalline α-Si3N4. The relative amount of c-Si3N4 was the smallest in the shock-compressed product of the residue pyrolyzed at 1273 K, indicating that use of amorphous residues is advantageous for formation of c-Si3N4.

Original languageEnglish
Pages (from-to)741-744
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume121
Issue number1416
DOIs
Publication statusPublished - 2013 Aug

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Keywords

  • Cubic silicon nitride
  • Perhydropolysilazane
  • Polymer-derived ceramics
  • Shock compression

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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