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Green Density of a Powder Compact and Its Influence on the Steady‐State Wave Velocity in Combustion Synthesis of Condensed Phase
Author(s) -
Bhattacharya Arun K.
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb08268.x
Subject(s) - combustion , porosity , thermal conductivity , porous medium , steady state (chemistry) , materials science , phase (matter) , phase velocity , mechanics , thermodynamics , thermal , mineralogy , composite material , chemistry , physics , optics , organic chemistry
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.