COMBUSTION PERFORMANCE OF Ni-COATED AND UNCOATED HIGH ENERGETIC ALUMINUM NANOPARTICLES
عنوان مقاله: COMBUSTION PERFORMANCE OF Ni-COATED AND UNCOATED HIGH ENERGETIC ALUMINUM NANOPARTICLES
شناسه ملی مقاله: JR_IJMSEI-12-1_004
منتشر شده در در سال 1393
شناسه ملی مقاله: JR_IJMSEI-12-1_004
منتشر شده در در سال 1393
مشخصات نویسندگان مقاله:
H. Shalchian
A. Farbod
H. Beygi
S. A. Sajjadi
خلاصه مقاله:
H. Shalchian
A. Farbod
H. Beygi
S. A. Sajjadi
High energetic aluminum nanoparticles are mainly used as additive in solid rocket propellants. However,
fabrication of these aluminized energetic materials is associated with decreasing the burning rate of propellants due
to problems such as oxidation and agglomeration of nanoparticles. In this study, to improve combustion performance
of aluminum nanoparticles, coating by metallic Ni shell was studied. Nickel coating of aluminum nanoparticles was
performed through electroless deposition (ED) subsequently, morphology and chemical composition of Ni-coated
nanoparticles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM),
energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). These studies show that a uniform Ni layer with a
thickness of ۱۰nm is coated on the surface of Al nanoparticles. Thermal analysis of uncoated and Ni-coated aluminum
nanoparticles was done using differential thermal analysis (DTA) and thermo gravimetric analysis (TGA). The results
of thermal analysis indicate that, coating the aluminum particles by Ni, leads to improvement in combustion
performance of aluminum nanoparticles through decreasing critical ignition temperature, ignition delay time of the
nanoparticles and promoting the ignition by exothermic chemical reactions between Al and Ni
کلمات کلیدی: Combustion mechanism, Aluminum nanoparticle, Electroless deposition, Electron microscopy
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1723179/