Open AccessInitiation and development of exothermic reactions during solid-phase synthesis under explosive loading
Author(s) -
F Vladimir Tolkachev,
Oksana Ivanova,
A. S. Zelepugin
Publication year - 2019
Publication title -
thermal science/thermal science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.339
H-Index - 43
eISSN - 2334-7163
pISSN - 0354-9836
DOI - 10.2298/tsci19s2505t
Subject(s) - ampoule , exothermic reaction , explosive material , detonation , materials science , inert , phase (matter) , porosity , composite material , inert gas , porous medium , fracture (geology) , thermodynamics , chemical engineering , chemistry , organic chemistry , physics , engineering
The previous numerical and experimental studies of the solid-phase synthesis of porous reactive mixtures (Al-S and Al-Tf) placed into cylindrical ampoules subjected to explosive detonation revealed the sharp increase in temperatures and pressures. The results have shown that high heat release and high increase in pressure due to exothermic reactions in the mixture, on the one hand, promote the faster development of reactions and, on the other hand, contribute to the formation of a gas phase that, in turns, may lead to the damage or even fracture of ampoules. This problem is solved by adding an inert porous aluminum layer to the bottom part of the mixture. Computations are carried out using the model of a multicomponent medium and the finite element method. Numerical simulation has shown that in this case the fracture of cylindrical ampoules is not observed.