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Preparation of Nanophase SiC/Si3N4, SiC/B4C and Stoichiometric Sic From Mixtures of A Vinylic Polysilane and Metal Powders

Published online by Cambridge University Press:  25 February 2011

Zhiping Jrang  and
Wendell E. Rhine
Zhiping Jrang
Affiliation:
Ceramics Processing Research Laboratory, Massachusetts Institute of Technology Cambridge, MA 02139
Wendell E. Rhine
Affiliation:
Ceramics Processing Research Laboratory, Massachusetts Institute of Technology Cambridge, MA 02139
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Abstract

Pyrolysis of a vinylic polysilane (VPS, Union Carbide Y12044) under argon at 1600 °C resulted in the formation of SiC with 20% residual carbon. The excess carbon was transformed to B4C or SiC by mixing B or Si powder with VPS and pyrolyzing the mixture under a flow of argon. When excess Si was added and the mixture was pyrolysed under N2 at 1395 °C, a SiC/ Si3N4 composite was obtained. All the products showed a fine-grained microstructure and excellent homogeneity. The precursors and the pyrolysis products were characterized by means of FIIR, TGA, XRD, SEM, STEM, BET, and elemental analysis.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 286: Symposium J – Nanophase and Nanocomposite Materials , 1992 , 437
Copyright
Copyright © Materials Research Society 1993

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References

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