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Graphite fluoride as a new oxidizer to construct nano-Al based reactive material and its combustion performance.
- Source :
-
Combustion & Flame . Jul2021, Vol. 229, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- Reactive materials consisting of aluminum (Al) and fluorine-containing oxidizers have been extensively developed owing to high energy density and potential applications in propellants and explosives. Herein, graphite fluoride (CF) as a new fluorine-containing oxidizer was introduced to construct nano-Al based reactive materials. Systematic investigation and comparison were executed on exothermic reaction behavior and combustion performance of nano-Al/CF and nano-Al/polytetrafluoroethylene (PTFE) based reactive materials. The energy output and exothermic peak of nano-Al/CF were approximately 2367 J/g and 641 °C, which were 300 J/g and 85 °C higher than those of nano-Al/PTFE, respectively. The effects of nano-Al/CF mass ratio and packing density on burning rates were examined to fully understand combustion reaction and flame propagation behavior. Nano-Al/CF exhibited excellent burning rate (1670 m/s), much higher than that of nano-Al/PTFE (930 m/s). More interestingly, flame splitting phenomenon including three distinct flame regions was observed on the critical position with the highest burning rate for nano-Al/CF with the mass ratios of 25/70 and 30/75. The burning rate of nano-Al/CF increased and then decreased with the packing densities ranging from 20.87% to 53.47% TMD. The dominating combustion reaction products (AlF 3 and C) were further determined to figure out the reaction mechanism. These results demonstrated that CF as fluorine-containing oxidizer to construct reactive materials has potential applications in propellants, explosives and pyrotechnics. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00102180
- Volume :
- 229
- Database :
- Academic Search Index
- Journal :
- Combustion & Flame
- Publication Type :
- Academic Journal
- Accession number :
- 150575092
- Full Text :
- https://doi.org/10.1016/j.combustflame.2021.02.039