Thermodynamics and vaporization of ceramics based on the Gd2O3-ZrO2 and Gd2O3-HfO2 systems studied by KEMS

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Thermodynamics and vaporization of ceramics based on the Gd2O3-ZrO2 and Gd2O3-HfO2 systems studied by KEMS. / Kablov, Eugene N.; Shilov, Andrey L.; Stolyarova, Valentina L.; Karachevtsev, Fedor N.; Lopatin, Sergey I.; Shugurov, Sergey M.; Vorozhtcov, Viktor A.

In: Journal of Alloys and Compounds, Vol. 908, 164575, 05.07.2022.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{3bf0d87260484187ba46714b04f12760,

title = "Thermodynamics and vaporization of ceramics based on the Gd2O3-ZrO2 and Gd2O3-HfO2 systems studied by KEMS",

abstract = "Thermodynamic properties and vaporization processes of the Gd 2O 3-HfO 2 and Gd 2O 3-ZrO 2 systems were studied by the Knudsen effusion mass spectrometric method (KEMS). The samples used in the present study were synthesized by sintering of pure oxides. The vapor species over the systems at the temperature 2600 K were GdO, ZrO, HfO, ZrO 2, and atomic oxygen. The partial pressures of the vapor species, the component activities, and the excess Gibbs energies were obtained in the binary systems studied. It was illustrated that thermodynamic properties found in both systems had the negative deviations from ideality. The thermodynamic data found in the present study were also discussed using the results of modeling of the component activities based on the generalized lattice theory of associated solutions. Correlations were shown between the observed changes in the thermodynamic behavior of the Gd 2O 3-HfO 2 and Gd 2O 3-ZrO 2 systems and the relative number of bonds formed in the condensed phase when the second coordination sphere was taken into consideration. ",

keywords = "Ceramics, Nuclear reactor materials, Oxide materials, Rare earth alloys and compounds, Thermodynamic properties",

author = "Kablov, {Eugene N.} and Shilov, {Andrey L.} and Stolyarova, {Valentina L.} and Karachevtsev, {Fedor N.} and Lopatin, {Sergey I.} and Shugurov, {Sergey M.} and Vorozhtcov, {Viktor A.}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = jul,

day = "5",

doi = "10.1016/j.jallcom.2022.164575",

language = "English",

volume = "908",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Thermodynamics and vaporization of ceramics based on the Gd2O3-ZrO2 and Gd2O3-HfO2 systems studied by KEMS

AU - Kablov, Eugene N.

AU - Shilov, Andrey L.

AU - Stolyarova, Valentina L.

AU - Karachevtsev, Fedor N.

AU - Lopatin, Sergey I.

AU - Shugurov, Sergey M.

AU - Vorozhtcov, Viktor A.

PY - 2022/7/5

Y1 - 2022/7/5

N2 - Thermodynamic properties and vaporization processes of the Gd 2O 3-HfO 2 and Gd 2O 3-ZrO 2 systems were studied by the Knudsen effusion mass spectrometric method (KEMS). The samples used in the present study were synthesized by sintering of pure oxides. The vapor species over the systems at the temperature 2600 K were GdO, ZrO, HfO, ZrO 2, and atomic oxygen. The partial pressures of the vapor species, the component activities, and the excess Gibbs energies were obtained in the binary systems studied. It was illustrated that thermodynamic properties found in both systems had the negative deviations from ideality. The thermodynamic data found in the present study were also discussed using the results of modeling of the component activities based on the generalized lattice theory of associated solutions. Correlations were shown between the observed changes in the thermodynamic behavior of the Gd 2O 3-HfO 2 and Gd 2O 3-ZrO 2 systems and the relative number of bonds formed in the condensed phase when the second coordination sphere was taken into consideration.

AB - Thermodynamic properties and vaporization processes of the Gd 2O 3-HfO 2 and Gd 2O 3-ZrO 2 systems were studied by the Knudsen effusion mass spectrometric method (KEMS). The samples used in the present study were synthesized by sintering of pure oxides. The vapor species over the systems at the temperature 2600 K were GdO, ZrO, HfO, ZrO 2, and atomic oxygen. The partial pressures of the vapor species, the component activities, and the excess Gibbs energies were obtained in the binary systems studied. It was illustrated that thermodynamic properties found in both systems had the negative deviations from ideality. The thermodynamic data found in the present study were also discussed using the results of modeling of the component activities based on the generalized lattice theory of associated solutions. Correlations were shown between the observed changes in the thermodynamic behavior of the Gd 2O 3-HfO 2 and Gd 2O 3-ZrO 2 systems and the relative number of bonds formed in the condensed phase when the second coordination sphere was taken into consideration.

KW - Ceramics

KW - Nuclear reactor materials

KW - Oxide materials

KW - Rare earth alloys and compounds

KW - Thermodynamic properties

UR - http://www.scopus.com/inward/record.url?scp=85126937776&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/30834bb8-ac86-30e3-b951-10ff40b8ac52/

U2 - 10.1016/j.jallcom.2022.164575

DO - 10.1016/j.jallcom.2022.164575

M3 - Article

VL - 908

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

M1 - 164575

ER -

ID: 93768037