Influence of the Amount of Fe2O3Modifier on the Oxidation Rate of ASD-4 Micron-Sized Powder
| Autor: | A. I. Ancharov, V. N. Krasil’nikov, Vitaliy G. Shevchenko, B.P. Tolochko, Z. S. Vinokurov, D. A. Eselevich, A. V. Konyukova |
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| Rok vydání: | 2020 |
| Předmět: |
Exothermic reaction
Diffraction Materials science 010304 chemical physics General Chemical Engineering Analytical chemistry Iron oxide Intermetallic General Physics and Astronomy Energy Engineering and Power Technology chemistry.chemical_element General Chemistry engineering.material 01 natural sciences 010406 physical chemistry 0104 chemical sciences chemistry.chemical_compound Fuel Technology Coating chemistry Aluminium 0103 physical sciences engineering Mass concentration (chemistry) Oxidation rate |
| Zdroj: | Combustion, Explosion, and Shock Waves. 56:156-162 |
| ISSN: | 1573-8345 0010-5082 |
| DOI: | 10.1134/s0010508220020069 |
| Popis: | 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 $$\gamma$$ -Al2O3and $$\alpha$$ -Al2O3, $$\gamma$$ -Fe2O3, and $$\alpha$$ -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 $$\alpha$$ -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). |
| Databáze: | OpenAIRE |
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