Effect of Coal Content and Mechanical Activation on the Combustion of a Ni-Al-C System
N. A. Kochetov, A. E. Sychev
Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, 142432 Russia
Keywords: горение, механическая активация, интерметаллиды, Ni + Al + C, алюминид никеля, фазовый состав продуктов, combustion, mechanical activation, intermetallides, Ni + Al + C, nickel aluminide, phase composition of products
Abstract
Effect of carbon content in a Ni-Al-C system and preliminary mechanical activation on a burning rate, sample elongation, and yield of the mixture after mechanical activation, as well as on the structural features of combustion products is under study. Combustion in pressed samples from a mechanically preactivated Ni + Al mixture at room temperature could not be activated. The introduction of carbon (2, 4, 6% (wt.)) Into the Ni + Al reaction mixture allows for combustion in Ni - Al - C based pressed samples. Preliminary mechanical activation of the Ni + Al + x C reaction mixture expands a carbon content limit in the mixture at which the combustion of pressed samples is possible. In addition, mechanical activation, as well as an increase in the carbon content in the Ni - Al - C system reduces the burning rate. An explanation of the observed relationships is proposed.
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