Subsolidus Structure of the NiO – MgO – Al2O3 – SiO2 System

The subsolidus structure of a four-component oxide system MgO – NiO – Al2O3 – SiO2 is considered using thermodynamic data of solid-phase reactions in the system and results of its geometric-topological analysis. Specific features of the subsolidus structure at different temperatures are discussed with allowance for the reversibility of individual solid-phase reactions. Technological implications in the prediction of the phase composition of materials in the NiO – Ni2SiO4 – MgAl2O4 – Mg2SiO4 concentration region are discussed.