Mathematical Modeling of the Thermal Explosion in Mechanically Activated SiO2 + Al Mixtures
O. V. Lapshin, V. K. Smolyakov
Tomsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Tomsk, 634021 Russia
Keywords: порошковая смесь, механическая активация, тепловой взрыв, powder mixture, mechanical activation, thermal explosion
Abstract
A mathematical model of synthesis in a mechanically activated SiO2 + Al mixture is constructed in the macroscopic approximation. It is demonstrated that preliminary mechanical activation makes it possible to obtain solid-phase ignition and to ensure synthesis of Al2O3 and Si products in the thermal explosion regime. Based on experimental data, thermophysical and thermokinetic constants of the process are determined.
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