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High temperature properties of thermal barrier coatings obtained by detonation spraying |
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| Authors: | Y N Wu P L Ke Q M Wang C Sun F H Wang |
| Affiliation: | a Institute of Metal Research, Chinese Academy of Sciences, State Key Laboratory for Corrosion and Protection, Shenyang 110016, China;b Laboratory of High Temperature Materials, Center for Advanced Research of Energy Conversion Materials, Hokkaido University, Sapporo, 060-8628, Japan |
| Abstract: | NiCrAlY/YPSZ and NiCrAlY/NiAl/YPSZ thermal barrier coatings (TBCs) were successfully deposited by detonation spraying. The results indicated that the detonation sprayed TBCs included a uniform ceramic coat containing a few microcracks and a bond coat with a rough surface. The lamellar structure and the presence of cracks and impurities could reduce the thermal conductivity of the ceramic coat. Oxidation kinetics at 1000–1150 °C of detonation sprayed TBCs have been measured and discussed. The role of a Ni–Al intermediate layer in improving the oxidation resistance of duplex TBCs has also been studied. |
| Keywords: | Thermal barrier coatings (TBCs) Detonation spraying Thermal conductivity Oxidation |
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