Thermodynamic description of the Gd2O3-Y2O3-HfO2 and La2O3-Y2O3-HfO2 systems at high temperatures

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Abstract

Thermodynamic properties of the Gd 2 O 3 -Y 2 O 3 -HfO 2 and La 2 O 3 -Y 2 O 3 -HfO 2 systems were obtained by Knudsen effusion mass spectrometric method at the temperatures 2500 K and 2337 K, respectively. Description of the thermodynamic properties of these systems was obtained using the Barker theory. It was illustrated that negative deviations from the ideality in these systems were related to the formation of the Me-O-Y and Y-O-Hf bonds in the solid solutions. Accuracy of the optimization of the thermodynamic data in the Gd 2 O 3 -Y 2 O 3 -HfO 2 system using the Barker theory was checked in comparison with the traditional Redlich-Kister approximation approach.

Original languageEnglish
Pages (from-to)165-170
Number of pages6
JournalCalphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume65
DOIs
Publication statusPublished - 2019

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Thermodynamic properties
Thermodynamics
Solid solutions
Temperature
lanthanum oxide

Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering(all)
  • Chemistry(all)
  • Computer Science Applications

Cite this

@article{6ec0139f18fd4aef98829e722752131d,
title = "Thermodynamic description of the Gd2O3-Y2O3-HfO2 and La2O3-Y2O3-HfO2 systems at high temperatures",
abstract = "Thermodynamic properties of the Gd 2 O 3 -Y 2 O 3 -HfO 2 and La 2 O 3 -Y 2 O 3 -HfO 2 systems were obtained by Knudsen effusion mass spectrometric method at the temperatures 2500 K and 2337 K, respectively. Description of the thermodynamic properties of these systems was obtained using the Barker theory. It was illustrated that negative deviations from the ideality in these systems were related to the formation of the Me-O-Y and Y-O-Hf bonds in the solid solutions. Accuracy of the optimization of the thermodynamic data in the Gd 2 O 3 -Y 2 O 3 -HfO 2 system using the Barker theory was checked in comparison with the traditional Redlich-Kister approximation approach.",
keywords = "Lattice theory, Oxide systems, Thermodynamic modeling",
author = "A.L. Shilov and V.L. Stolyarova and V.A. Vorozhtcov and S.I. Lopatin",
year = "2019",
doi = "10.1016/j.calphad.2019.03.001",
language = "English",
volume = "65",
pages = "165--170",
journal = "Calphad: Computer Coupling of Phase Diagrams and Thermochemistry",
issn = "0364-5916",
publisher = "Elsevier",

}

TY - JOUR

T1 - Thermodynamic description of the Gd2O3-Y2O3-HfO2 and La2O3-Y2O3-HfO2 systems at high temperatures

AU - Shilov, A.L.

AU - Stolyarova, V.L.

AU - Vorozhtcov, V.A.

AU - Lopatin, S.I.

PY - 2019

Y1 - 2019

N2 - Thermodynamic properties of the Gd 2 O 3 -Y 2 O 3 -HfO 2 and La 2 O 3 -Y 2 O 3 -HfO 2 systems were obtained by Knudsen effusion mass spectrometric method at the temperatures 2500 K and 2337 K, respectively. Description of the thermodynamic properties of these systems was obtained using the Barker theory. It was illustrated that negative deviations from the ideality in these systems were related to the formation of the Me-O-Y and Y-O-Hf bonds in the solid solutions. Accuracy of the optimization of the thermodynamic data in the Gd 2 O 3 -Y 2 O 3 -HfO 2 system using the Barker theory was checked in comparison with the traditional Redlich-Kister approximation approach.

AB - Thermodynamic properties of the Gd 2 O 3 -Y 2 O 3 -HfO 2 and La 2 O 3 -Y 2 O 3 -HfO 2 systems were obtained by Knudsen effusion mass spectrometric method at the temperatures 2500 K and 2337 K, respectively. Description of the thermodynamic properties of these systems was obtained using the Barker theory. It was illustrated that negative deviations from the ideality in these systems were related to the formation of the Me-O-Y and Y-O-Hf bonds in the solid solutions. Accuracy of the optimization of the thermodynamic data in the Gd 2 O 3 -Y 2 O 3 -HfO 2 system using the Barker theory was checked in comparison with the traditional Redlich-Kister approximation approach.

KW - Lattice theory

KW - Oxide systems

KW - Thermodynamic modeling

UR - https://www.sciencedirect.com/science/article/abs/pii/S0364591618302396

UR - http://www.scopus.com/inward/record.url?scp=85062207510&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/thermodynamic-description-gd-2-o-3-y-2-o-3-hfo-2-la-2-o-3-y-2-o-3-hfo-2-systems-high-temperatures

U2 - 10.1016/j.calphad.2019.03.001

DO - 10.1016/j.calphad.2019.03.001

M3 - Article

VL - 65

SP - 165

EP - 170

JO - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

JF - Calphad: Computer Coupling of Phase Diagrams and Thermochemistry

SN - 0364-5916

ER -