Modified thick thermal barrier coatings:: Microstructural characterization

被引：50
|
作者：
Ahmaniemi, S
Vippola, M
Vuoristo, P
Mäntylä, T
Cernuschi, F
Lutterotti, L
机构：
[1] Tampere Univ Technol, Inst Sci Mat, FIN-33101 Tampere, Finland
[2] CESI, I-20090 Segrate, Italy
[3] Univ Trent, I-38050 Trento, Italy
来源：
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2004年 / 24卷 / 08期
基金：
芬兰科学院;
关键词：
functional applications; microstructural characterization; TBC; thermal barrier coatings; ZrO2;
D O I：
10.1016/S0955-2219(03)00639-3
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：
Thick thermal barrier coatings were modified with laser glazing and phosphate based sealing treatments. Surface porosity of the scaled coatings decreased significantly in all cases. Structural analysis showed a strong preferred crystal orientation of the t'ZrO2 phase in direction [002] in laser-glazed 25CeO(2)-2.5Y(2)O(3)-ZrO2 coating. In laser-glazed 22MgO-ZrO2 coating the major phase was rhombohedral Mg2Zr5O12. In phosphate sealed 8Y(2)O(3)-ZrO2 coating the strengthening mechanism was identified as adhesive binding without chemical bonding. Coating microstructures were determined by scanning electron microscopy, energy dispersive spectroscopy, transmission electron microscopy and optical microscopy. Coatings were also characterized by X-ray diffraction, microhardness and porosity. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2247 / 2258
页数：12
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