Impact of Mechanical Activation on the Burning Rate of Pressed and Bulk-Density Samples from a Ni + Al Mixture
B. S. Seplyarskii, N. A. Kochetov, R. A. Kochetkov
Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, 142432 Russia
Keywords: горение, механическая активация, скорость горения, поток газа, кондуктивный теплообмен, лучистый теплообмен, combustion, mechanical activation, burning rate, gas flow, conductive heat transfer, radiant heat transfer
Abstract
This paper describes a study on the burning of pressed and bulk-density samples from a Ni + Al mixture subjected to mechanical activation. It is shown that mechanical activation and dispersion have a different impact on the burning rate of the samples under study. The gas flow hardly changes the burning rate of the bulk-density mixtures. The linear burning rate of the dispersed bulk-density mixture is 1.7 times greater than that of the pressed mixture, and the mass burning rates are equal to each other. The calculations showed that the conductive heat transfer mechanism in the combustion wave of the dispersed bulk density mixture is the principal mechanism.
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