Physicochemical Properties of Sm2O3-ZrO2-HfO2 Ceramics for the Development of Promising Thermal Barrier Coatings

被引：8

作者：

Bakradze, M. M. ^{[1
]}

Doronin, O. N. ^{[1
]}

Artemenko, N., I ^{[1
]}

Stekhov, P. A. ^{[1
]}

Marakhovskii, P. S. ^{[1
]}

Stolyarova, V. L. ^{[2
]}

机构：

[1] All Russian Sci Res Inst Aviat Mat, Moscow 105005, Russia

[2] St Petersburg State Univ, St Petersburg 199034, Russia

来源：

RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2021年 / 66卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

thermal barrier coating; samarium oxide; zirconium oxide; hafnium oxide; TRANSFORMATION;

D O I：

10.1134/S003602362105003X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In continuation of our systematic study of the options of the development of high-performance thermal barrier coatings based on three-component ceramic materials comprising rare-earth oxides, we report on the effects of component concentrations on the thermophysical properties of ceramics based on the Sm2O3-ZrO2-HfO2 system. Samarium oxide is found to stabilize these ceramics when its concentration is higher than 22.5 mol % and zirconium oxide concentration is lower than 56.7 mol %. The temperature coefficient of linear expansion (TCLE) of the studied ceramic materials in the temperature range 20-1400 degrees C can reach alpha(L) = (10.4 +/- 0.6) x 10(-6) with acceptable values of the thermal conductivity coefficient at a level of 0.56-0.84 W/(m K).

引用

页码：789 / 797

页数：9

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