Formation of Cu layer on Al nanoparticles during thermite reaction in Al/CuO nanoparticle composites: Investigation of off-stoichiometry ratio of Al and CuO nanoparticles for maximum pressure change
作者： Kyuhyeon Lee , Dahin Kim , Jaewon Shim , Sangbum Bae , Do Joong Shin
DOI: 10.1016/J.COMBUSTFLAME.2015.07.019
关键词: Stoichiometry 、 Mass transfer 、 Cuo nanoparticles 、 Transmission electron microscopy 、 Condensation 、 Thermite 、 Materials science 、 Nanoparticle 、 Composite material 、 Layer (electronics)
摘要: Abstract We analyzed thermite reactions in composites comprised of Al and CuO nanoparticles (NPs) investigated pressure change pressurization rate as a function composition. Although the stoichiometric ratio for reaction between is 2:3, our experiments show that maximum occurs Al-rich composites. Transmission electron microscopy analysis products revealed considerable number NPs are coated with Cu layer. attribute formation layer on surface during to off-stoichiometry, since renders relatively less reactive. Based experimental data, we propose mechanism which gasified grows into layer, gas-phase species travels from sites unreacted NP surface. Analysis characteristic timescale heat mass transfer reveals condensation faster than overall reaction.
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sci-hub.se 参考文章(37)
Zuhair A Munir, J B Holt, Combustion and plasma synthesis of high-temperature materials Combustion and Plasma Synthesis of High-Temperature Materials. pp. 501- ,(1990)
Michelle?L. Pantoya, John?J. Granier, Combustion Behavior of Highly Energetic Thermites: Nano versus Micron Composites Propellants, Explosives, Pyrotechnics. ,vol. 30, pp. 53- 62 ,(2005) , 10.1002/PREP.200400085
A. Prakash, A. V. McCormick, M. R. Zachariah, Synthesis and Reactivity of a Super‐Reactive Metastable Intermolecular Composite Formulation of Al/KMnO4 Advanced Materials. ,vol. 17, pp. 900- 903 ,(2005) , 10.1002/ADMA.200400853
Demitrios Stamatis, Zhi Jiang, Vern K. Hoffmann, Mirko Schoenitz, Edward L. Dreizin, Fully Dense, Aluminum-Rich Al-CuO Nanocomposite Powders for Energetic Formulations Combustion Science and Technology. ,vol. 181, pp. 97- 116 ,(2008) , 10.1080/00102200802363294
Guoqiang Jian, Nicholas W. Piekiel, Michael R. Zachariah, Time-Resolved Mass Spectrometry of Nano-Al and Nano-Al/CuO Thermite under Rapid Heating: A Mechanistic Study Journal of Physical Chemistry C. ,vol. 116, pp. 26881- 26887 ,(2012) , 10.1021/JP306717M
Guoqiang Jian, Snehaunshu Chowdhury, Kyle Sullivan, Michael R. Zachariah, Nanothermite reactions: Is gas phase oxygen generation from the oxygen carrier an essential prerequisite to ignition? Combustion and Flame. ,vol. 160, pp. 432- 437 ,(2013) , 10.1016/J.COMBUSTFLAME.2012.09.009
M. Vijayakumar, Self-propagating high-temperature synthesis Journal of Materials Science. ,vol. 27, pp. 6249- 6273 ,(1992) , 10.1007/BF00576271
G. Young, K. Sullivan, N. Piekiel, M. R. Zachariah, Aluminum Hydride as a Fuel Supplement to Nanothermites Journal of Propulsion and Power. ,vol. 30, pp. 70- 77 ,(2014) , 10.2514/1.B34988
Swati M. Umbrajkar, Mirko Schoenitz, Edward L. Dreizin, Exothermic reactions in Al–CuO nanocomposites Thermochimica Acta. ,vol. 451, pp. 34- 43 ,(2006) , 10.1016/J.TCA.2006.09.002
Pengxiang Song, Dongsheng Wen, ZX Guo, Theodosios Korakianitis, None, Oxidation investigation of nickel nanoparticles Physical Chemistry Chemical Physics. ,vol. 10, pp. 5057- 5065 ,(2008) , 10.1039/B800672E