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Shrinking core model to describe metal particle oxidation from thermal analysis data

: Kelzenberg, S.; Eisenreich, N.; Knapp, S.; Weiser, V.


International journal of energetic materials and chemical propulsion 15 (2016), Nr.1, S.35-48
ISSN: 2150-766X (print)
ISSN: 2150-7678 (online)
Fraunhofer ICT ()

The oxidation of metals has widespread applications ranging from microelectronics to surface sciences, corrosion, and oxygen storage. High energetic materials mainly embody active metal particles, in addition to oxidizers and organic materials. Pyrotechnic compositions are based on metallic particles as well as thermites, which consist of metalâmetal oxide combinations with differing metals. During various applications, the metal particles are subjected to reacting atmospheres, the oxidation being the most important result. For example, the conversion of solid energetic material starts with the phase transition and decomposition to build an oxidizing atmosphere in order to convert the metallic particles to metal oxide particles. The most important metals form solid oxides even at low temperatures. In this case, diffusion dominates the reaction in most reaction domains. In addition, diffusion and reaction may occur simultaneously.