Specific Features of the Reaction between Ultrafine Aluminum and Water in a Combustion Regime

摘要

The combustion of mixtures of an ultrafine electroexplosive aluminum powder with water thickened by a 3% polyacrylamide additive is investigated.The reaction in a combustion regime is accompanied by the formation of a superheated foamy layer in gel-like water.The incompleteness of alluminum burnout in a stoichiometric mixture,which is explained by boiling-out of water from the reaction zone,is shown.The maximum combustion temperatures are determined in various conditions by means of thermocouple measurements and combustion-product composition calculations.The possibility of producing ultrafine or monolithic corundum as a reaction product is shown.