Effect of Content and Mechanical Activation on the Combustion of a Ni–Al–C System

Resumo

Effect of carbon content in a Ni–Al–C system and preliminary mechanical activation on a burning rate, sample elongation, and mixture yield 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 addition of carbon [2, 4, and 6% (by weight)] into the reacting Ni + Al mixture allows for combustion in Ni–Al–C based pressed samples. Preliminary mechanical activation of the reacting Ni + Al + xC 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. The observed relationships are explain.