MICROSTRUCTURES OF Y2O3-STABILIZED ZRO2 ELECTRON-BEAM PHYSICAL VAPOR-DEPOSITION COATINGS ON NI-BASE SUPERALLOYS

被引：103
|
作者：
UNAL, O [1 ]
MITCHELL, TE [1 ]
HEUER, AH [1 ]
机构：
[1] CASE WESTERN RESERVE UNIV,DEPT MAT SCI & ENGN,CLEVELAND,OH 44106
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 1994年 / 77卷 / 04期
关键词：
D O I：
10.1111/j.1151-2916.1994.tb07256.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：
The microstructures of ZrO2-20 wt% Y2O3 thermal barrier coatings formed by electron beam-physical vapor deposition on a Ni-base superalloy have been studied by transmission electron microscopy. The coating systems consist of several layers, including a superalloy substrate, a bond coat, an Al2O3 scale, and the PVD coating. The overall ceramic thermal barrier coatings were characterized, with special emphasis being given to the alpha-Al2O3 scale which forms between the bond coat and the ZrO2-Y2O3 coating. The oxide scale exhibited various morphologies in different coating systems; the majority of the porosity formed in this region for all coatings.
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收藏
页码：984 / 992
页数：9
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