Ignition and Combustion of Mechanically Activated Powder Compositions (Review). II. Combustion
A. S. Rogachev
Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Russia
Keywords: preliminary mechanical activation, combustion wave speed, combustion temperature, SHS
Abstract
The effect of preliminary mechanical activation of powder compositions on the combustion rate and maximum temperature is considered. The burning rate can increase, decrease or pass through an extremum with increasing activation time. It is argued that this complex behavior is most fully described by a microheterogeneous combustion model; homogeneous and convective-conductive models are also considered. The questions of whether additional energy is accumulated in powder mixtures under mechanical treatment and why superadiabatic combustion temperatures are not observed in activated compositions are discussed.
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