Interaction of Al2O3 Melt with Nitrogen at High Temperatures and Pressure of 1 Bar

Abstract

The main interaction reactions in the Al₂O₃−N₂ system are determined for a temperature of 2400 K and pressure of 1 bar. It is found that, in the absence of direct interaction of nitrogen (molecular and atomic) with the melt, chemical reactions may occur between nitrogen and the products of Al₂O₃ melt dissociative evaporation. The reactions of nitrogen oxidation and the interaction reactions between nitrogen oxides and the melt, both direct and with participation of elementary oxygen or gaseous aluminum oxides, are determined. It is shown that the elementary nitrogen forms may interact with melt jointly with nitrogen oxides and (or) with all Al-containing components of the system. The concentrations of the gaseous materials that are in equilibrium with Al₂O₃ are calculated by the Monte Carlo method.