Abstract
Thermal spraying with flame is one of the distinctive methods in the treatment of turbine blades cracks and oil pipes due to their working conditions. In the current research, a nickel cermet coating (Ni) enhanced by zirconia (ZrO2) with a fixed rate (5%) and different contents of titanium oxide (TiO2) (0, 5, 10, 15, and 20%) was prepared. The contents to be coated were stirred using a locally made stirrer for 2 h. The coating was applied using thermal spraying with flame on 316 L steel surfaces with a fixed spraying distance (15 cm). The thermal treatment of resulting samples was performed at 1000 °C for only 2 h. Moreover, hardness, porosity, adhesion strength, thermal analyses and scanning electron microscope (SEM) were tested. After the sintering process, the results showed that the highest hardness was 789 Hv, the highest adhesion strength was 24 MPa, while the lowest porosity was 9.22%. On the other hand, thermal analyses resulted in a thermal expansion without a steel surface of coating as 18.4 × 10−6 K−1. The SEM images showed a clear blending and cohesion between the cermet components, leading to a significant improvement in the physical and mechanical properties of the cermet coating layers.
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The authors are very grateful to the University of Mosul/College of Education for Pure Sciences for providing their facilities, which helped to improve the quality of this work.
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Ahmed, H.H., Ahmed, A.R., Darweesh, S.Y. et al. Processing of Turbine Blades Using Cermet Composite Materials. J Fail. Anal. and Preven. 20, 2111–2118 (2020). https://doi.org/10.1007/s11668-020-01027-0
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DOI: https://doi.org/10.1007/s11668-020-01027-0