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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.28 SNIP: 0.421 CiteScore™: 0.9

ISSN Imprimer: 2150-766X
ISSN En ligne: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.2012004927
pages 231-243

SYNTHESIS OF NANO-NICKEL-COATED MICRO-ALUMINUM AND THERMAL REACTIVITY OF ALUMINUM/NICKELSTANNIC-OXIDE THERMITE

Yi Wang
School of Materials Science and Engineering, North University of China, Taiyuan 030051, People's Republic of China
Xiaolan Song
School of Environment and Safety Engineering, North University of China, Taiyuan 030051, People's Republic of China
Wei Jiang
National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Technology, Nanjing, 210094, China
Guodong Deng
National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing 210094, China
Xiaode Guo
National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Technology
Other research areas:Nanomaterials, Energetic Materials
Hongying Liu
National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing 210094, China
Fengsheng Li
National Special Superfine Powder Engineering Research Center, Nanjing University of Science & Technology, Nanjing, 210094, China

RÉSUMÉ

The displacement method was employed to modify the surface of micron Al on which a layer of Ni nanoparticles were coated. NH4F acted as a key that enabled the displacement reaction to occurr. Al/Ni composites (with different coating percentage) were mixed with SnO2 and the mixtures were used as thermites. The thermite reaction of Al/Ni−SnO2 was investigated. For reactions between Al/Ni and SnO2, the onset temperature was lowered and the reaction heat remarkably increased compared with the Al−SnO2 reaction. Thermites Al−SnO2 and Al/Ni−SnO2 were heated simultaneity to 1020° C. The heated residues were investigated by scanning electron microscope, energy-dispersive spectroscopy, and x-ray diffraction analyses. Residue of raw Al manifested hollow shells composed of Al, α-Al2O3, and [θ ]-Al2O3; residue of Al/Ni exhibited broken fragments and bulk sinters consisting of α-Al2O3, AlN, [θ ]-Al2O3, and faint NiO.


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