1. Thermodynamics and vaporization of ceramics based on the Y2O3-ZrO2 system studied by KEMS
- Author
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Fedor N. Karachevtsev, Viktor A. Vorozhtcov, Valentina L. Stolyarova, Eugene N. Kablov, and Sergey I. Lopatin
- Subjects
Materials science ,Mechanical Engineering ,Metals and Alloys ,Thermodynamics ,02 engineering and technology ,Partial pressure ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,Mass spectrometric ,0104 chemical sciences ,Mechanics of Materials ,visual_art ,Vaporization ,Materials Chemistry ,visual_art.visual_art_medium ,Ceramic ,Knudsen number ,0210 nano-technology - Abstract
The ceramics based on the Y2O3-ZrO2 system is promising for development of refractory materials including ultra-high temperature ceramics. In the present study the samples of the Y2O3-ZrO2 system were synthesized by the solid-state method. The vaporization processes and thermodynamic properties of the Y2O3-ZrO2 system were studied by the Knudsen effusion mass spectrometric method. The vapor composition, the YO, ZrO, ZrO2 and O partial pressures over the samples as well as the Y2O3 and ZrO2 activities of the Y2O3-ZrO2 system were determined at the temperature 2660 K. Thermodynamic properties (i.e. excess Gibbs energies) of the Y2O3-ZrO2 system obtained in the present study can be described in terms of the subregular solution model.
- Published
- 2019