Microstructural evolution of thermal barrier coatings during isothermal oxidation

被引：3

作者：

Salazar, A. ^{[1
]}

Gomez-Garcia, J. ^{[1
]}

Poza, P. ^{[1
]}

Utrilla, V. ^{[1
]}

机构：

[1] Univ Rey Juan Carlos, Dept Ciencia & Ingn Mat, ESCET, C-Tulipan S-N, Madrid 28933, Spain

来源：

LAYERED, FUNCTIONAL GRADIENT CERAMICS, AND THERMAL BARRIER COATINGS: DESIGN, FABRICATION AND APPLICATIONS | 2007年 / 333卷

关键词：

thermal barrier coatings; thermal spray; oxidation; heat treatment; scanning electron microscopy; transmission electron microscopy; X ray diffraction;

D O I：

10.4028/www.scientific.net/KEM.333.269

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：

This paper analyses the degradation of a ceramic top coating 70%ZrO2 - 30%CaO deposited onto a stainless steel AISI 304 by thermal spray, using Ni-6%Al-5%Mo as overlay coating. These thermal barrier coatings were heat treated for 48, 120 and 288 h at 800 degrees C to evaluate the degradation of these materials by isothermal oxidation. The microstructure evolution during oxidation was analysed by environmental scanning electron microscopy, transmission electron microscopy and X ray microanalysis. A thermally grown oxide layer was observed between the overlay coating and the ceramic top coating after oxidation. This layer was formed by a mixed Al, Ni and Mo oxides.

引用

页码：269 / +

页数：2

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