Macrokinetics of high-temperature heterogeneous reactions: SHS aspects

Abstract

High-temperature transformations of matter at the SHS wave is considered. The experimental problems arising in the studies on fast heterogeneous reactions are discussed. Conclusion is drawn that the most informative are here the unconventional nonisothermal methods: electrothermal explosion, electrothermography, DTA and DSC. The results on the high-temperature macrokinetics both in the system ' ‘compacted metal-gas’ and in powder mixtures of metals with carbon, boron and aluminum are discussed. Considered is the influence of concomitant processes (sintering, degazing, melting and capillary spreading of one of reactants or eutectics appearing as an intermediate reaction product, etc.). Discussed is correlation between the kinetic and macrokinetic parameters and the regularities of the SHS wave propagation. Outlined are the urgent problems of macrokinetics of high-temperature heterogeneous reactions at the SHS wave. © 1992 IUPAC