Model of Polymorphic Transformation in a Shock Wave. 2. Silica
S. A. Kinelovskii
Lavrent'ev Institute of Hydrodynamics Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Keywords: polymorphism, shock wave, quartz, coesite, stishovite, phase transition
Abstract
This paper presents a model that links the polymorphic transformation of a crystalline substance under shock-wave loading with a change in its elastic energy. The complete and partial transformation of the substance in the shock front and the conditions for the occurrence of this transformation are determined. The model was tested by describing polymorphic transition in non-porous pyrolytic graphite and transitions in the silicon dioxide system. It is shown that the model satisfactorily describes available experimental results.
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