The Effect of Certain Additives on Critical Diameter and Combustion Rates of Mixtures of Aluminum with Gelled Water
ARMY FOREIGN SCIENCE AND TECHNOLOGY CENTER CHARLOTTESVILLE VA
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Critical diameter and combustion rate at atmospheric pressure, combustion rate vs. pressure in the 20-100 atm range, and completeness of oxidation of aluminum at pressures of up to 60-100 atm were determined for 5050 AlH2O and stoichiometric MgH2O mixtures, with and without addition of 1-5 KF, NaF, LiF, AlF3 and NaOH. Graphs of the resulting data are presented. It is concluded that these additives increase Al H2O ignitibility and decrease critical diameter, that NaF and KF have a greater effect on combustion rate than the others and that the improved ignition and combustion result from the action of boiling water solutions of NaF and KF in destruction of the oxide films.
- Combustion and Ignition