Study of the Mechanism and Regularities of Nitriding the Complex Ferrosilicoaluminum Ferroalloy in the SHS Mode

Abstract—The results of an investigation into the mechanism of nitriding the ferrosilicoaluminum complex alloy under isothermal and nonisothermal conditions are presented. It is shown that the nitriding process of ferrosilicoaluminum is complex and multistage. It is established that, when nitriding the ferroalloy, the primary product is AlN; then Si₃N₄ is synthesized and Si₃N₄-based solid solutions are formed. The influence of the main parameters of self-propagating high-temperature synthesis on the velocity and degree of nitriding the ferrosilicoaluminum alloy is investigated. Critical parameters of the combustion process are revealed.