Modeling of sequential reactions during micropyretic synthesis View Full Text


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Article Info

DATE

1996-04

AUTHORS

V. Subramanian, M. G. Lakshmikantha, J. A. Sekhar

ABSTRACT

A numerical model for a two-step sequential micropyretic reaction is reported. Such multiple reactions can take place during micropyretic synthesis of composite materials. The model was developed for the aluminothermic reaction between molybdenum oxide, aluminum, and silicon, which react to give molybdenum disilicide and aluminum oxide. The model was used to obtain the solution for the propagation of the combustion front. The melting of various constituents of reactants and products was incorporated into the model. The effect of the pre-exponential factor and the amount of diluent on the nature of propagation and temperature profile was investigated. Other conditions of propagation and synthesis for general two-step reactions were explored by changing the activation energy and heat release of each sequential reaction. A mapping procedure to characterize the types of sequential reactions is proposed and studied for several aluminothermic type reactions. More... »

PAGES

961-972

References to SciGraph publications

  • 1993-12. Influence of multi-dimensional oscillating combustion fronts on thermal profiles in JOURNAL OF MATERIALS SCIENCE
  • 1990-02-01. Self-propagating high-temperature (combustion) synthesis (SHS) of powder-compacted materials in JOURNAL OF MATERIALS SCIENCE
  • 1979-01. Some principles of combustion of titanium-silicon mixtures in COMBUSTION, EXPLOSION, AND SHOCK WAVES
  • 1968-10. Flame propagation in the presence of two successive gas-phase reactions in COMBUSTION, EXPLOSION, AND SHOCK WAVES
  • 1979-03. Determination of the spherical deflagration parameters in COMBUSTION, EXPLOSION, AND SHOCK WAVES
  • 1973-03. Stagewise combustion of nonvolatile easily dispersed substances in COMBUSTION, EXPLOSION, AND SHOCK WAVES
  • 1991-12. Microstructural aspects of fabricating bodies by self-propagating synthesis in JOURNAL OF MATERIALS SCIENCE
  • 1971-01. Propagation of a pulsating exothermic reaction front in the condensed phase in COMBUSTION, EXPLOSION, AND SHOCK WAVES
  • 1979-09. Scale effects in fracture in COMBUSTION, EXPLOSION, AND SHOCK WAVES
  • 1992-01. Numerical modeling of solidification combustion synthesis in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1991-01-01. Synthesis of molybdenum silicides by the self-propagating combustion method in JOURNAL OF MATERIALS SCIENCE
  • 1993-01-01. Thermite reactions: their utilization in the synthesis and processing of materials in JOURNAL OF MATERIALS SCIENCE
  • 1993-10. Rapid solidification by unstable combustion synthesis in JOURNAL OF MATERIALS RESEARCH
  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1007/bf02649764

    DOI

    http://dx.doi.org/10.1007/bf02649764

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1029116990


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