Electrothermal Explosion of a Titanium - Soot Mixture under Quasistatic Compression. II. KInetics and Mechanism of Interaction in a Titanium - Soot Mixture
V. A. Shcherbakov, A. V. Shcherbakov, S. A. Bostandzhiyan
Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, 142432 Russia
Keywords: электротепловой взрыв, высокотемпературная кинетика, карбид титана, electrothermal explosion, high-temperature kinetics, titanium carbide
Abstract
The experimental study of the high-temperature interaction kinetics of a titanium - soot mixture under quasistatic compression in an electrothermal explosion (ETE) is described. Dependences of the heating rate of a sample mixture on temperature are obtained, and the effective values of the energy of ignition activation and thermal explosion are calculated. The formation of the microstructure of intermediate and final interaction products is investigated. It is shown that the formation of a final product occurs according to a shell - core mechanism. The high rate of the solid-phase interaction of titanium and soot is explained by the formation of micropores and microcracks in the intermediate product, which ensure the high rate of surface diffusion of carbon.
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