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Oxidation behavior of thermal barrier coatings with HVOF and detonation-sprayed NiCrAlY bondcoats |
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| Authors: | FH Yuan ZX Chen ZG Wang SJ Zhu |
| Affiliation: | a Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, PR China b School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, PR China c Department of Intelligent Mechanical Engineering, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan d Thermal spray Laboratory, Shenyang Liming Aero-engine Group Corporation Ltd., AVIC 1, Shenyang 110043, PR China |
| Abstract: | The high-velocity oxygen-fuel (HVOF) technology was employed to deposit the bondcoat of a thermal barrier coating (TBC) system. The isothermal oxidation rate at 1100 °C of the TBC system with the HVOF bondcoat is two times lower than that of the TBC system with the detonation-sprayed bondcoat. The better isothermal oxidation resistance of the TBCs with HVOF sprayed bondcoats demonstrates that unlike alumina dispersoids in the HVOF sprayed bondcoat, rough surface of the detonation-sprayed bondcoat is undesirable for the detonation-sprayed TBC system concerning oxidation due to a large specific surface area and unfavorable oxides on the bondcoat. |
| Keywords: | A Thermal barrier coatings C Oxidation B High-velocity oxygen-fuel spray B Detonation spray C Thermally grown oxide |
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