Abstract
The effect of the modification of ASD-4 micron-sized aluminum powder by iron oxide on its oxidation in air was investigated. The metal particle surface was modified by coating with a gel based on Fe(OH)(HCOO)2 and ethylene glycol monomethyl ether, CH3OC2H4OH, with subsequent heat treatment in air. It was found that the presence of iron oxide generally had a positive effect on the oxidation dynamics of ASD-4 powder under heating in air. The oxidation rate of modified powders increases with increasing content of iron oxide in them. X-ray diffraction analysis using a synchrotron radiation source under heating to 1000°C showed the presence of only the basic phases of γ-Al2O3and α-Al2O3, γ-Fe2O3, and α-Fe2O3in the samples, and other iron oxides or intermetallic compounds were not detected. At a mass concentration of 10% Fe, an earlier appearance of the α-Al2O3phase was observed and the exothermic heat release peak was shifted to lower temperatures (893°C) compared to the unmodified ASD-4 powder (1045°C).
Original language | English |
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Pages (from-to) | 156-162 |
Number of pages | 7 |
Journal | Combustion, Explosion and Shock Waves |
Volume | 56 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Mar 2020 |
Keywords
- aluminum
- basic iron formate
- iron oxides
- modification
- oxidation
- phase analysis
- powder