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Reaction of a molten mixture of titanium, aluminum, and silicon oxides with hot-pressed silicon nitride

  • Theory and Technology of Sintering Processes, Thermal, and Chemicothermal Treatment
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Powder Metallurgy and Metal Ceramics Aims and scope

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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Authors and Affiliations

  1. Ukrainian Academy of Sciences, Institute of Materials Science Problems, Kieve

    V. Ya. Petrovskii & V. L. Yupko

Authors
  1. V. Ya. Petrovskii
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  2. V. L. Yupko
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Translated from Poroshkovaya M etallurgiya, No. 5, pp. 39–44, May, 1993.

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Petrovskii, V.Y., Yupko, V.L. Reaction of a molten mixture of titanium, aluminum, and silicon oxides with hot-pressed silicon nitride. Powder Metall Met Ceram 32, 409–413 (1993). https://doi.org/10.1007/BF00561263

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  • DOI: https://doi.org/10.1007/BF00561263

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