Graded thermal barrier coatings: Evaluation

被引：0
|
作者：
Mendelson, M.I. [1 ]
McKechnie, T.N. [1 ]
Spiegel, L.B. [1 ]
机构：
[1] Rocketdyne Div/Rockwell Int'l, Canoga Park, United States
来源：
Ceramic Engineering and Science Proceedings | 1994年 / 15卷 / 04期
关键词：
Fatigue testing - Glazes - Grading - Heat resistance - Laser applications - Nickel compounds - Plasma spraying - Sprayed coatings - Stress analysis - Surface treatment - Thermal effects - Zirconia;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
`Dual graded' thermal barrier coatings have been developed in order to increase the coating life of conventional plasma sprayed ceramic thermal barrier coatings (NiCrAIY bond coat plus zirconia-based top coat). This coating consisted of plasma sprayed NiCrAIY bond coat, graded interlayer of NiCrAIY / ZrO2-8%Y203, and ZrO2-Y2O3 top coats with a laser glazed surface layer. These coatings had two gradients: an interlayer composition gradient and a density gradient at the surface of the top coat. These coatings were compared with conventional plasma sprayed coatings after cyclic thermal testing. The thermal fatigue life of the `dual graded' coatings was significantly greater than that of conventional coatings.
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页码：555 / 562
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