Thermodynamics and vaporization of ceramics based on the Y2O3-ZrO2 system studied by KEMS

被引：28

作者：

Kablov, Eugene N. ^{[1
]}

Stolyarova, Valentina L. ^{[2
]}

Vorozhtcov, Viktor A. ^{[2
]}

Lopatin, Sergey I. ^{[2
]}

Karachevtsev, Fedor N. ^{[1
]}

机构：

[1] All Russian Res Inst Aviat Mat, Radio St 17, Moscow 105005, Russia

[2] St Petersburg State Univ, Univ Skaya Nab 7-9, St Petersburg 199034, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 794卷

基金：

俄罗斯基础研究基金会;

关键词：

Vaporization; Thermodynamics; Rare earth oxides; Ceramics based on ZrO2; Knudsen effusion mass spectrometry; PHASE-EQUILIBRIA; DISSOCIATION-ENERGIES; SYSTEM; ZIRCONIA; YTTRIA; OXIDES; HAFNIA; COATINGS;

D O I：

10.1016/j.jallcom.2019.04.208

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 2019 Published by Elsevier B.V.

引用

页码：606 / 614

页数：9

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