Physicochemical Properties of Gd2O3-ZrO2-HfO2 Ceramics as Promising Thermal Barrier Coatings

被引：3
|
作者：
Doronin, O. N. [1 ]
Artemenko, N. I. [1 ]
Stekhov, P. A. [1 ]
Marakhovskii, P. S. [1 ]
Stolyarova, V. L. [2 ]
Vorozhtsov, V. A. [2 ]
机构：
[1] VIAM, Kurchatov Inst, Moscow 105005, Russia
[2] St Petersburg State Univ, St Petersburg 199034, Russia
来源：
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY | 2022年 / 67卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
thermal barrier coating; gadolinium oxide; zirconium oxide; hafnium oxide; TRANSFORMATION;
D O I：
10.1134/S0036023622050060
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
In continuation of work on potentials for the design of high-performance thermal barrier coatings based on three-component ceramic materials containing rare-earth oxides, here we discuss the results of our study of the effects of components on the thermophysical properties of Gd2O3-ZrO2-HfO2 ceramics. Gadolinium oxide and hafnium oxide stabilize the thermal coefficient of linear expansion (TCLE) of ceramic samples in the three-component system Gd2O3-ZrO2-HfO2. Given that the gadolinium oxide and hafnium oxide are in equal amounts (10 to 15 mol %) and zirconia is an amount of at least 70 mol %, the TCLE (alpha(L)) of Gd2O3-ZrO2-HfO2 ceramics ranges from 7.4 x 10(-6) to 10.5 x 10(-6) with acceptable values of thermal conductivity (0.98-1.35 W/(m K)).
引用
收藏
页码：732 / 739
页数：8
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