Thermal stability of nanostructured 13 wt% Al2O3-8 wt% Y2O3-ZrO2 thermal barrier coatings

被引：50

作者：

Yu, Qinghe ^{[1
]}

Zhou, Chungen ^{[1
]}

Zhang, Huiyan ^{[1
]}

Zhao, Feng ^{[1
]}

机构：

[1] Beijing Univ Aeronaut & Astronaut, Dept Mat Sci & Engn, Minist Educ, Key Lab Aerosp Mat & Performance, Beijing 100191, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Thermal barrier coatings; Nanostructured Al2O3-Y2O3-ZrO2; Grain growth; Porosity; Thermal properties; MECHANICAL-PROPERTIES; GRAIN-GROWTH; PLASMA SPRAY; BEHAVIOR; POROSITY; MICROSTRUCTURE; CONDUCTIVITY; CRACKS; SIZE;

D O I：

10.1016/j.jeurceramsoc.2009.10.005

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanostructured 13 wt%Al2O3-8Wt% Y2O3-ZrO2 (13AlYSZ) coatings were developed by atmospheric plasma spraying (APS). The phase structure and the morphology of the 13AlYSZ coatings were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). It was found that the as-sprayed coatings mainly consisted of tetragonal zirconia, with the Al element solid solution in ZrO2. Heat treatment at 1100 degrees C increased the average grain size of the ZrO2 phase from 61 to 120 nm and decreased the porosity from 23.8 to 18%. The addition of the nano-Al2O3 can effectively inhibit the grain growth of the zirconia phase. The mechanism on inhibiting the grain growth of nanostructured 8 wt% Y2O3-ZrO2 thermal barrier coatings has been discussed in detail. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：889 / 897

页数：9

共 30 条

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