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Design and Synthesis of Chemical Precursors to Boron Carbide

Published online by Cambridge University Press:  25 February 2011

Xiaoguang Yang ,
Stephen Johnson ,
M. Frederick ,
Hadcing Zheng ,
Kevin Thorne  and
J. D. Mackenzie
Xiaoguang Yang
Affiliation:
Department of Chemistry and Biochemistry, University of California at Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90024.
Stephen Johnson
Affiliation:
Department of Chemistry and Biochemistry, University of California at Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90024.
Hadcing Zheng
Affiliation:
Department of Materials Science and Engineering, University of California at Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90024.
Kevin Thorne
Affiliation:
Department of Materials Science and Engineering, University of California at Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90024.
J. D. Mackenzie
Affiliation:
Department of Materials Science and Engineering, University of California at Los Angeles, 405 Hilgard Ave., Los Angeles, CA 90024.
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Abstract

The design of molecular and preceramic polymer precursors to boron carbide based ceramics is described. The goal was to design nonvolatile, tractable precursors to boron carbide with high ceramic yields. Molecular precursors containing carburane cages and acetylenie groups were synthesized and converted to nonvolatile, soluble preceramic polymers. Pyrolysis of these polymers gave boron carbide based ceramics in 60–70% ceramic yield. A B4C/SiC film has been fabricated from one of the polymers and the film is uniform and crack-free.

Information

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 271: Symposium N – Better Ceramics Through Chemistry V , 1992 , 827
Copyright
Copyright © Materials Research Society 1992

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References

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