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Thermodynamics and vaporization of the Sm2O3–ZrO2 system studied by Knudsen effusion mass spectrometry. / Vorozhtcov, Viktor A.; Stolyarova, Valentina L.; Shilov, Andrey L.; Lopatin, Sergey I.; Shugurov, Sergey M.; Karachevtsev, Fedor N.
в: Journal of Physics and Chemistry of Solids, Том 156, 110156, 01.09.2021.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Thermodynamics and vaporization of the Sm2O3–ZrO2 system studied by Knudsen effusion mass spectrometry
AU - Vorozhtcov, Viktor A.
AU - Stolyarova, Valentina L.
AU - Shilov, Andrey L.
AU - Lopatin, Sergey I.
AU - Shugurov, Sergey M.
AU - Karachevtsev, Fedor N.
N1 - Publisher Copyright: © 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
PY - 2021/9/1
Y1 - 2021/9/1
N2 - The purpose of the present study was to examine the thermodynamic properties and vaporization processes in the Sm2O3–ZrO2 system by the Knudsen effusion mass spectrometric method (KEMS). The samples in the system under consideration were synthesized by the solid-state method using a high-energy ball mill. Vapor over the Sm2O3–ZrO2 system consisted of SmO, Sm, and O in the temperature range 2200–2540 K. Concentration dependences of the SmO and Sm partial vapor pressures, the component activities, and excess Gibbs energies were obtained at a temperature of 2452 K in the compositional range of 0.23–0.73 Sm2O3 mole fraction. These data evidenced negative deviations from the ideal behavior and a possibility to use the subregular solution model to describe the concentration dependences of the thermodynamic properties in the Sm2O3–ZrO2 system. Correlations were found between the observed changes in the thermodynamic behavior of the system mentioned and the relative number of bonds when the second coordination sphere was taken into consideration in the condensed phase calculated by the Generalized Lattice Theory of Associated Solutions.
AB - The purpose of the present study was to examine the thermodynamic properties and vaporization processes in the Sm2O3–ZrO2 system by the Knudsen effusion mass spectrometric method (KEMS). The samples in the system under consideration were synthesized by the solid-state method using a high-energy ball mill. Vapor over the Sm2O3–ZrO2 system consisted of SmO, Sm, and O in the temperature range 2200–2540 K. Concentration dependences of the SmO and Sm partial vapor pressures, the component activities, and excess Gibbs energies were obtained at a temperature of 2452 K in the compositional range of 0.23–0.73 Sm2O3 mole fraction. These data evidenced negative deviations from the ideal behavior and a possibility to use the subregular solution model to describe the concentration dependences of the thermodynamic properties in the Sm2O3–ZrO2 system. Correlations were found between the observed changes in the thermodynamic behavior of the system mentioned and the relative number of bonds when the second coordination sphere was taken into consideration in the condensed phase calculated by the Generalized Lattice Theory of Associated Solutions.
KW - Ceramics (A)
KW - Inorganic compounds (A)
KW - Oxides (A)
KW - Phase equilibria (D)
KW - Thermodynamic properties (D)
KW - Inorganic compounds
KW - ZIRCONIA
KW - HIGH-TEMPERATURES
KW - SOLID-SOLUTIONS
KW - HAFNIA
KW - Oxides
KW - Ceramics
KW - SM2O3-Y2O3-HFO(2)SYSTEM
KW - THERMAL BARRIER COATINGS
KW - CONDUCTIVITY
KW - Phase equilibria
KW - OXIDES
KW - Thermodynamic properties
KW - CERAMICS
UR - http://www.scopus.com/inward/record.url?scp=85105583468&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/40400045-099f-35d5-91bd-1a4e01940e52/
U2 - 10.1016/j.jpcs.2021.110156
DO - 10.1016/j.jpcs.2021.110156
M3 - Article
AN - SCOPUS:85105583468
VL - 156
JO - Journal of Physics and Chemistry of Solids
JF - Journal of Physics and Chemistry of Solids
SN - 0022-3697
M1 - 110156
ER -
ID: 76973527