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
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页码：269 / +
页数：2
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