Modeling of shock-induced chemical reactions in powder mixtures
- 15 June 1988
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 63 (12) , 5718-5727
- https://doi.org/10.1063/1.340309
Abstract
Chemical reactions in inorganic powder mixtures under high‐pressure shock wave loading are described by two mathematical models, one homogeneous and the other heterogeneous. The models are formulated based upon existing results of observations on post‐shock samples of Al‐Ni, Al‐Ti, and ZnO‐Fe2O3 mixtures. Two mechanisms were isolated for the development of the initial models: (1) the creation of a nonequilibrium mixture by dynamic mass mixing, and (2) ensuing chemical reactions. The homogeneous model was evaluated under shock conditions using a one‐dimensional wave propagation code, and suggested requisite conditions for the thermal excursion of localized reactions: a localized initial peak temperature of 1000–2000 K and reaction time constants of 1 μs or less. Calculations indicate that reactions occur while the sample is under shock loading, consistent with observations of post‐shock samples.This publication has 7 references indexed in Scilit:
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