EFFECT OF PREALUMINIZATION ON THE PROPERTIES OF ZRO2-8 WT-PERCENT Y2O3/CO-29CR-6AL-1Y THERMAL-BARRIER COATINGS

被引：9

作者：

LIH, W ^{[1
]}

CHANG, E ^{[1
]}

CHAO, CH ^{[1
]}

TSAI, ML ^{[1
]}

机构：

[1] AERO IND DEV CTR,AERO ENGINE FACTORY,KANG SAN,TAIWAN

来源：

OXIDATION OF METALS | 1992年 / 38卷 / 1-2期

关键词：

THERMAL-BARRIER COATINGS; PREALUMINIZED CO-CR-AL-Y BOND COAT; THERMAL-CYCLIC OXIDATION;

D O I：

10.1007/BF00665047

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Specimens of investment-cast Mar-M247 superalloy were vacuum-plasma sprayed with Co-29Cr-6Al-1Y bond coat, and part of the specimens were further pre-aluminized at 980-degrees-C for 2, 4, 6, 8, and 10 hours. All the specimens were then deposited with ZrO2-8 wt.% Y2O3 thermal-barrier coatings (TBCs) and thermally cycled at 1050-degrees-C to evaluate the effect of time of the prealuminizing treatment on the performance and failure mechanism of the modified system. Results showed that TBC specimens with pre-aluminized bond coatings exhibited lower oxidation rates and significantly higher cyclic life when compared with unaluminized specimens. The failure of bond-coat pre-aluminized TBC specimens was observed to propagate mainly along the lamellar splats of the top coat, whereas the failure of conventional TBC specimens occurred mainly along the top-coat/spinel oxides interface.

引用

页码：99 / 124

页数：26

共 28 条

[1] A PHILOSOPHY FOR THERMAL BARRIER COATING DESIGN AND ITS CORROBORATION BY 10000-H SERVICE EXPERIENCE ON RB211 NOZZLE GUIDE VANES [J].