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Combustion, Explosion and Shock Waves

2017 year, number 2

Measurement of Thermo-EMF and Determination of Combustion Parameters of a mixture of 5TI + 3SI under Quasi-Isostatic Compression

V. A. Shcherbakov, V. Yu. Barinov
Institute of Structural Macrokinetics and Materials Science, Chernogolovka, 142432 Russia
Keywords: горение, СВС, ЭДС, квазиизостатическое сжатие, combustion, SHS, EMF, quasi-isostatic compression

Abstract

This paper presents experimental dependences of the temperature, thermo-emf, speed and width of the combustion wave of a heterogeneous mixture of 5Ti + 3Si on the pressure of quasi-isostatic compression. Combustion parameters are calculated from measurements of the temperature gradient and the difference between the electrical potentials in the combustion wave. It is shown that under quasi-isostatic compression conditions, the maximum burning rate is 90 mm/s and the width of the combustion wave is 10 mm. It is found that the voltage-temperature characteristic of combustion of a heterogeneous mixture of 5Ti + 3Si has a hysteresis shape. The cause of the hysteresis related to a change in the bulk concentration of electric charge carriers in the combustion wave is discussed.