In Situ Combustion Synthesis of h-BN-SiC High-Temperature Ceramics

Abstract:

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The feasibility of fabricating h-BN-SiC high-temperature ceramics by in-situ combustion synthesis was demonstrated by igniting the mixture of boron carbide and silicon powder under 100MPa nitrogen pressure. The reaction thermodynamics and the adiabatic combustion temperature were calculated theoretically. The phase composition, microstructure and mechanical properties of composite were identified by XRD and SEM. The maximum bending strength and fracture toughness of the composite were 65.2 MPa and 1.4 MPa·m1/2 under room temperature, respectively. The effects of h-BN and SiC dilution contents on the mechanical properties of composite were also discussed.

Info:

Periodical:

Key Engineering Materials (Volumes 353-358)

Edited by:

Yu Zhou, Shan-Tung Tu and Xishan Xie

Pages:

1501-1504

DOI:

10.4028/www.scientific.net/KEM.353-358.1501

Citation:

H. B. Li et al., "In Situ Combustion Synthesis of h-BN-SiC High-Temperature Ceramics", Key Engineering Materials, Vols. 353-358, pp. 1501-1504, 2007

Online since:

September 2007

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Price:

$35.00

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