Synthesis of a Nitrided Composite Material from Ferroalumosilicozirconium during Combustion

Abstract

The possibility of obtaining a composite material from a ferroalloy based on silicon, aluminum, and zirconium nitrides using self-propagating high-temperature synthesis is considered. It is shown that introducing up to 35% of a nitrogen-containing additive on the basis of ferroalumosilicozirconium to the initial ferroalloy leads to an increase in the nitrogen fraction, emission of the basic nitride phases in combustion products, deceleration of the combustion wave front, and reduction of the maximum combustion temperature. It is revealed that adding more than 20% of a preliminary nitrided material makes it possible to stabilize the combustion wave front propagation conditions and to obtain combustion products with a macroscopically homogeneous composition. Under the conditions of natural filtration of nitrogen, combustion of a powder mixture based on ferroalumosilicozirconium and a nitrided material yields a composite consisting of AlN, Si₃N₄, ZrN, and \(\alpha\)-Fe phases.