Effects of incorporation of micro and nano Al2O3 layers on thermal shock behaviour of YSZ thermal barrier coatings

被引：13

作者：

Rahnavard, M. ^{[1
]}

Ghorabi, M. J. Ostad Ahmad ^{[1
]}

Rahnein, M. ^{[1
]}

Rafiee, H. ^{[2
]}

机构：

[1] Islamic Azad Univ, Fac Mech & Ind Engn, Semnan Branch, Semnan, Iran

[2] IUST, Sch Met & Mat Engn, Tehran, Iran

来源：

CANADIAN METALLURGICAL QUARTERLY | 2016年 / 55卷 / 03期

关键词：

TBC; YSZ/Al2O3; Thermal shock; TEMPERATURE; RESISTANCE;

D O I：

10.1080/00084433.2016.1196845

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

In the present paper, thermal shock behaviour of usual YSZ and layered composite TBCs was evaluated. The layered composite TBCs used in this study were YSZ/micro Al2O3 and YSZ/nano Al2O3 in which Al2O3 was as a topcoat on the YSZ layer. In addition, coating microstructures were investigated using scanning electron microscope; EDS and X-ray diffraction techniques before and after thermal shock test. The results showed that incorporation of a nano Al2O3 oxygen barrier layer caused better thermal shock resistance, while micro Al2O3 layer on the top of YSZ sample resulted in sooner coating failure, compared to the usual TBC coating. Also, the thermal shock behaviour and failure mechanism of mentioned coatings were investigated.

引用

页码：312 / 320

页数：9

共 17 条

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