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Relationship between Field Direction and Wave Propagation in Activated Combustion Synthesis
Author(s) -
Feng Aiguo,
Munir Zuhair A.
Publication year - 1996
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.1151-2916.1996.tb08936.x
Subject(s) - combustion , perpendicular , field (mathematics) , ignition system , mechanics , wave propagation , computational physics , field strength , materials science , physics , optics , geometry , chemistry , thermodynamics , magnetic field , mathematics , organic chemistry , quantum mechanics , pure mathematics
Using experimental and modeling studies, the effect of field direction on the field‐activated combustion synthesis of SiC was investigated. Field application imposed in a direction perpendicular to wave propagation resulted in enhancement: the wave velocity increased linearly with an increase in field strength. For field application parallel to wave propagation, two cases were considered: confined and nonconfined areas of impacted energy from an ignition source. In the confined case both experimental (using laser ignition) and simulation studies were made. Both showed the establishment of a two‐front combustion with waves moving to opposite sides in a direction perpendicular to the field. In the nonconfined case, initial waves propagated in a direction parallel to the field but were independent of field strength. The results are interpreted in terms of a model in which the current is confined to the combustion zone, adding another source of heat to the combustion process, at a rate of σE 2 (J·cm ‐3 ·s ‐1 ).