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Combustion, Explosion and Shock Waves

2014 year, number 5

EFFECT OF CALCIUM ON THE OXIDATION KINETICS AND PHASE COMPOSITION OF THE PRODUCTS OF INTERACTION OF ALUMINUM-BASED ALLOY POWDERS

V. G. Shevchenko1, D. A. Eselevich1, A. I. Ancharov2,3, B. P. Tolochko2
1Institute of Solid State Chemistry, Ural Branch, Russian Academy of Sciences, Ekaterinburg 620990 Russia
2Institute of Solid State Chemistry and Mechanochemistry Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630128 Russia
3Novosibirsk State University, Novosibirsk, 630090 Russia
Keywords: aluminum powder, metal fuel, in situ study of structural transformation, alloying, oxidation activity

Abstract

The effect of the phase composition of an aluminum-based alloy powder containing 1.3% calcium and the products of its interaction with air on the kinetics and mechanism of oxidation was first shown by x-ray diffraction using synchrotron radiation. It was found that the high surface and chemical activity of calcium led to an increase of more than a factor of two in the completeness of the process in the temperature range of 1300-1550 K upon heating at 10 K/min.