Structure evolution upon sintering of alumina-based ceramic with an eutectic admixture

The issues of sintering ceramics based on corundum with a eutectic addition of the MnO - Al ₂ O ₃ - SiO ₂ system from the standpoint of the evolution of its structure are considered. When sintering in the presence of a small amount of eutectic, the behavior of the system changes significantly before and after the appearance of the liquid phase. Before the formation of the liquid phase, the process is determined by the properties of the material in contact between the particles, after which the system becomes sensitive to the state of the contact surface between the solid phase and eutectic liquid. The latter is explained by the fact that the eutectic composition is practically saturated with respect to aluminum oxide. Tab. 1, ill. 2, bibliography: 12 titles.