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Emission Spectroscopy of the Combustion Flame of Aluminium/Copper Oxide Thermite

: Knapp, Sebastian; Kelzenberg, Stefan; Raab, Angelika; Roth, Evelin; Weiser, Volker


Propellants, explosives, pyrotechnics 44 (2019), Nr.1, S.9-17
ISSN: 0340-7462
ISSN: 0721-3115
ISSN: 1521-4087
Fraunhofer ICT ()
emission; thermite; combustion; UV / VIS-spectroscopy

The combustion process of stoichiometric aluminium/copper(II)oxide thermite was experimentally investigated in an optical bomb under inert atmosphere (N-2) and ambient pressure. The reaction zone was monitored with UV/VIS emission spectroscopy and a colour high-speed camera. The emission spectra were analysed by modelling of the background radiation and the characteristic emission of all molecular emitters in the reaction of Al/CuO. Based on this, the particles surface and gas phase temperature, the emissivity and the radiation of energy was determined by a non-linear least squares fit between experimental and modelled spectra. This work presents the first modelling of the diatomic band system of Cu-2 and CuO. The results obtained can help to understand the underlying processes in thermite combustion and the influence of radiation processes in modelling the combustion of thermite mixtures.