|
| High Temperature Oxidation and Corrosion Property Test of NiCoCrAlYTa Coating on Turbine Blade |
| Received:July 28, 2018 Revised:November 25, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2018.11.010 |
| KeyWord:NiCoCrAlYTa coating, high temperature oxidation, gas hot-corrosion, Al2O3 oxide film |
| Author | Institution |
| LIU De-lin |
Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing , China |
| MU Ren-de |
Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing , China |
| LU Feng |
Aviation Key Laboratory of Science and Technology on Advanced Corrosion and Protection for Aviation Material, Beijing Institute of Aeronautical Materials, Beijing , China |
|
| Hits: |
| Download times: |
| Abstract: |
| Objective To insure security application of turbine blade and study temperature oxidation and corrosion behaviors of NiCoCrAlYTa coating. Methods For turbine blades with coating and without coating, the anti-oxidation test at 1050℃ for 100 hours and gas hot-corrosion test at 950 ℃ for 100 hours were carried out. After tests, microscopic features of substrate and coating were observed and analyzed. Results The average amount of oxide peeling and average oxidation rate of uncoated samples were 10 times and 3 times that of coated samples after anti-oxidation test. There were pits on the surface of the uncoated samples. The coating of the coated samples was intact and the substrate had no oxidation characteristics. After gas hot-corrosion test, the corrosion rate of uncoated samples was 3 times that of coated samples; and there were a large number of corrosion pits on the surface of uncoated samples. The coating of the coated samples was significantly corroded. Conclusion After a long period of high temperature oxidation and corrosion, the NiCoCrAlYTa coating can still form a complete Al2O3 oxide film, which can play a good protective role. Tantalum and yttrium elements can promote the formation and quality of the Al2O3 oxide film. |
| Close |
|
|
|