Abstract
The formation temperature of a liquid phase and the solidification temperature of a molten mixture of Al2O3-TiO2-SiO2 oxides on a silicon nitride substrate are determined. Data are obtained for the change in kinetics. It is established that the intensity of interaction of molten Al2O3-TiO2-SiO2 with silicon nitride depends on the oxide mixture composition. With heating there are two possibilities: improvement and worsening of Si3N4 crystallite wetting with a liquid phase as well as solidification of the melt. The temperature range where a liquid phase exists for actual materials is about 15°C, which markedly worsens the process of structure formation with Si3N4 during sintering.
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