Effect of mechanical pre-activation on the nitriding of aluminum ferrosilicon in the combustion mode

Abstract

Abstract A ceramic β-SiAlON-based composite is obtained by the SHS method using aluminum ferrosilicon as a raw material. The effect of mechanical pre-activation of a reaction mixture on the nitriding of aluminum ferrosilicon is studied. Mechanical activation of initial powders initiates SHS reaction at lower pressures and diameters, i.e. expands the parameters of combustion of aluminum ferrosilicon in nitrogen. It is shown that the nitriding of mechanically activated powders in the combustion mode can be used to obtain products with a higher nitrogen content. The products were investigated thoroughly. XRD analysis showed the presence of major phase β-Si3Al3O3N. As being one of the most widely used structural ceramics for various applications, exhibits excellent mechanical strength and superior high temperature properties.