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.

引用

页码：984 / 992

页数：9

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