Paper Title:
Synthesis, Characterization of Perhydropolysilazane and its Application in the Preparation of 3D SiO2f/Si 3N4 Composites
  Abstract

Perhydropolysilazane was synthesized by the ammonolysis of dichlorosilane-pyridine adduct, and used as precursor to prepare three-dimensional silica fiber reinforced silicon nitride matrix composites via preceramic polymer infiltration and pyrolysis at 1073Kin anhydrous ammonia atmosphere. The polymer-derived ceramic matrix was amorphous near-stoichiometric silicon nitride with an empirical formula of SiN1.34O0.02C0.01H1.21. The as-received composites were amorphous with a high density of 1.96g/cm3 after five infiltration-pyrolysis cycles. The process was successful to fabricate dense silicon nitride matrix composites reinforced by three-dimensional silica fiber due to the low viscosity, good wettability and high ceramic yield of perhydropolysilazane.

  Info
Periodical
Key Engineering Materials (Volumes 336-338)
Edited by
Wei Pan and Jianghong Gong
Pages
1233-1235
DOI
10.4028/www.scientific.net/KEM.336-338.1233
Citation
G. J. Qi, C. R. Zhang, H. F. Hu, F. Cao, S. Q. Wang, "Synthesis, Characterization of Perhydropolysilazane and its Application in the Preparation of 3D SiO2f/Si 3N4 Composites", Key Engineering Materials, Vols. 336-338, pp. 1233-1235, 2007
Online since
April 2007
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Price
$32.00
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