Evaluation of interface reactions in thermal barrier ceramic coatings

被引：37

作者：

Celik, E ^{[1
]}

Avci, E ^{[1
]}

Yilmaz, F ^{[1
]}

机构：

[1] Sakarya Univ, Fac Engn, Sakarya, Turkey

来源：

SURFACE & COATINGS TECHNOLOGY | 1997年 / 97卷 / 1-3期

关键词：

thermal barrier coatings; oxidation; interface; porosity;

D O I：

10.1016/S0257-8972(97)00383-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, the interface reactions in thermal barrier ceramic coatings (TBCs) on AISI 304L stainless steel substrates were investigated. The plasma-spray technique was employed to deposit metallic and ceramic powders such as MgZrO3, NiAl+MgZrO3 and NiCrAl+MgZrO3 on the substrate. The porosity of these coatings, measured by an optical method, was found to be between 6 and 9%. Oxidation tests were carried out to evaluate the interface reactions in TBCs at temperatures of 800, 900 and 1000 degrees C. The microstructures of the powders, coatings and oxidized coatings were examined by means of an optical microscope and X-ray diffractometry. The results show that the oxidation kinetics depend strongly on oxide layer thickness, temperature, duration of oxidation and composition of the bond coat. It was also observed that the oxidation rate changed with temperature was initially linear and then exponential. (C) 1997 Elsevier Science S.A.

引用

页码：361 / 365

页数：5

共 14 条

[1] FAILURE MECHANISMS OF A ZIRCONIA-8 WT-PERCENT YTTRIA THERMAL BARRIER COATING [J].