Microstructures and properties of plasma-sprayed segmented thermal barrier coatings

被引：12
|
作者：
Guo, HB [1 ]
Kuroda, S [1 ]
Murakami, H [1 ]
机构：
[1] Natl Inst Mat Sci, Mat Engn Lab, Tsukuba, Ibaraki 3050047, Japan
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2006年 / 89卷 / 04期
关键词：
D O I：
10.1111/j.1551-2916.2005.00912.x
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：
Thermal barrier coatings (TBCs) with different levels of segmentation crack density were produced by spraying two types of ZrO2-8Y(2)O(3) powders. The fused and crushed powder has a greater capability of forming segmented coatings than the hollow sphere (HOSP) one. The highly segmented coatings reveal much lower porosity compared with traditionally sprayed coatings, thereby compromising the property of thermal insulation of TBCs. Microstructure and thermal conductivity of the HOSP coatings are more sensitive to the changes in spray conditions. Segmentation cracks had a strong influence in decreasing Young's modulus of coatings. Fifty hours heat treatment at 1250 degrees C had little effect on the mechanical property of the highly segmented coatings.
引用
收藏
页码：1432 / 1439
页数：8
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