Optimisation of FGM TBC and their thermal cycling stability

被引：11
作者：
Gasik, M [1 ]
Kawasaki, A
Kang, YS
机构：
[1] Aalto Univ, FIN-02015 Helsinki, Finland
[2] Tohoku Univ, Sendai, Miyagi 9808579, Japan
来源：
FUNCTIONALLY GRADED MATERIALS VIII | 2005年 / 492-493卷
关键词：
coatings; TBC; hot burner test; superalloys; alumina; zirconia; residual stresses;
D O I：
10.4028/www.scientific.net/MSF.492-493.9
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Application of FGM concept for thermal barrier coatings (TBC) provides a superior thermal stress relaxation over homogeneous or duplex coatings. It was demonstrated that FGM TBC have better oxidation resistance and longer lifetime during test conditions. In this work, new FGM TBC system was designed using high-velocity oxygen flame (HVOF) coating process. After coatings optimisation, coating layer was subjected to a hot burner test for thermal fatigue cycling with increasing heat load. It was found that FGM TBC has successfully withstood thermal cycling and prevented visible delamination or transverse cracks. New coating design may give an opportunity to develop a cost-effective FGM TBC system for gas turbine applications.
引用
收藏
页码：9 / 14
页数：6
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