Green Density of a Powder Compact and Its Influence on the Steady-State Wave Velocity in Combustion Synthesis of Condensed Phase

Various experimental evidence indicates that the porosity of a compact has a pronounced effect on the steady‐state velocity in combustion synthesis of condensed phases, hut no simple and explicit treatment for it is available in the literature. Utilizing an existing model of the effective thermal co...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1991-09, Vol.74 (9), p.2113-2116
Main Author: Bhattacharya, Arun K.
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
combustion synthesis
Exact sciences and technology
General studies
green density
porosity
Technical ceramics
thermal conductivity
titanium diboride
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Summary:Various experimental evidence indicates that the porosity of a compact has a pronounced effect on the steady‐state velocity in combustion synthesis of condensed phases, hut no simple and explicit treatment for it is available in the literature. Utilizing an existing model of the effective thermal conductivity in a porous media, a simple model for the steady‐state velocity of the combustion front has been developed. As ob‐ served in experiments, the model also predicts a decrease in combustion velocity with increasing porosity. The developed equation can be helpful in the analysis and interpretation of experimental results in self‐propagating high‐temperature synthesis of condensed phase.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1991.tb08268.x