Affiliation:
1. Department of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210097, China
2. Zhejiang Material Industry Guanghua Civil Explosive Materials Co., Ltd., Hangzhou 310008, China
Abstract
A thorough investigation on the reactions and morphologies of Mg particles and Mg/Teflon/Viton (MTV) during oxidation were conducted via thermal gravity-differential scanning calorimetry (TG-DSC) and scanning electronic microscopy. The results showed that the oxidation of Mg is fast. It merely changed the metallic luster of Mg before 550 °C, and only a few particles changed to a white irregular shape at 600 °C. However, all of the Mg particles oxidized to porous irregular shaped MgO at 650 °C. Herein, the oxidation of Mg particles ended by its melting point, and the whole process is a solid–gas-phase reaction. On the other hand, when MTV reacted in air, the reaction could be divided into two stages: the fluorination of Mg and the oxidation of the exceeded Mg. In the first stage, a dense MgF2 shell was formed by the solid–solid fluorination. The dense MgF2 shell could impede the oxidation of Mg. As a result, the oxidation of Mg began after its melting. Furthermore, liquid Mg could vaporize at higher temperature, which could burst out from the MgF2 shell and react with oxygen. The MgF2 shell exhibited a dense feature, not only protecting the Mg particles from the heterogeneous oxidation at lower temperature, but also facilitates the homogeneous oxidation at higher temperature.
Subject
General Materials Science,Metals and Alloys
Reference16 articles.
1. Coffin, K. (2023, February 13). Burning Times of Magnesium Ribbons in Various Atmospheres, No. NACA-TN-3332, Available online: https://ntrs.nasa.gov/citations/19930084125.
2. Markstein, G. (1963). Symposium (International) on Combustion, Elsevier.
3. Combustion of a conglomerate of magnesium particles;Ozerov;Combust. Explos. Shock Waves,1971
4. Moser, G., Tschamber, V., Schonnenbeck, C., Brillard, A., and Brilhac, J.-F. (2018, January 12–14). Kinetic Analysis and Modelling of Mg Powder Slow Combustion. Proceedings of the 3rd World Congress on Momentum, Heat and Mass Transfer, Budapest, Hungary.
5. Shafirovich, E., and Goldshleger, U. (1995, January 10–12). Combustion of magnesium particles in carbon dioxide and monoxide. Proceedings of the 31st Joint Propulsion Conference and Exhibit, San Diego, CA, USA.
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