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Modeling of wave configuration during electrically ignited combustion synthesis

Published online by Cambridge University Press:  31 January 2011

O. A. Graeve ,
E. M. Carrillo-Heian ,
A. Feng  and
Z. A. Munir
O. A. Graeve
Affiliation:
Facility for Advanced Combustion Synthesis, Department of Chemical Engineering and Materials Science, University of California—Davis, Davis, California 95616–1885
E. M. Carrillo-Heian
Affiliation:
Facility for Advanced Combustion Synthesis, Department of Chemical Engineering and Materials Science, University of California—Davis, Davis, California 95616–1885
A. Feng
Affiliation:
Facility for Advanced Combustion Synthesis, Department of Chemical Engineering and Materials Science, University of California—Davis, Davis, California 95616–1885
Z. A. Munir*
Affiliation:
Facility for Advanced Combustion Synthesis, Department of Chemical Engineering and Materials Science, University of California—Davis, Davis, California 95616–1885
*
a)Address all correspondence to this author. e-mail: zamunir@ucdavis.edu
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Abstract

A model was developed to study the process of current-ignited combustion synthesis. In this process, Joule heating raises the temperature to the ignition point, at which the sample reacts to form a product. Two material systems were modeled: the synthesis of SiC and MoSi2. It was found that the mode of combustion is a function of the size (radius) of the sample. The anticipated volume combustion mode was only evident in small samples. At higher values of the radius, the mode becomes wavelike (selfpropagating high-temperature synthesis) in nature. The transition from volume to wave combustion mode also depended on the properties of the material. The results are interpreted in terms of thermal conductivity and heat-transfer conditions.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 1 , January 2001 , pp. 93 - 100
Copyright
Copyright © Materials Research Society 2001

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