Effect of the manufacturing parameters on the quality of the ceramic thermal barrier coating after ageing by thermal treatment
Ceramic coatings of zirconium oxide (ZrO2) were prepared and stabilized with yttrium oxide (7-8 wt% Y2O3) by plasma-aided thermal projection (APS), at different injection distance and carrier gas flow conditions. Ageing thermal treatments were performed to know the corresponding effects on the quality and performance of the thermal barrier. Determination of layer thickness of the thermal barrier, evolution of the thermally grown oxide (TGO) layer and the evaluation of the mechanical properties through nanoindentation was carried out by the micro-structural study. Results shown out that the effect of the projection distance is not significant. However, a significant effect of the gas flow, namely, the lower the flow is, the higher the thickness of the ceramic layer. Apparently, the layers coatings micro-structure is not significantly altered (the form of the splats) due to the increase in the treatment time, but the distribution of the defects and the exogenous particles (pollutants) presented clear shifts. Consequently, a decrease for the values of the mechanical properties of the layers which produce the thermal barrier was observed; also, thickness of the TGO layer was increased because of the thermal treatment time. During undertaken studies, the TGO layer never exceed the critical limit.
Chen, W.R.; Wu, X.; Marple, B.R. The growth and influence grown oxide in a thermal barrier coating. J. Surf. Coat., 2006, 10, pp. 1074-1079.
Clarke, D. R. Thermal Barrier Coatings for More Efficient Gas Turbine Engines. MRS Bull., 2012, 37, pp. 891-898.
García Martínez, M. Desarrollo de Recubrimientos de Base Aluminio Mediante “MOCVD” Para Protección Frente a La Corrosión y a La Oxidación". 2012, Madrid, España: Universidad Complutense de Madrid.
Levi, C.G. Materials Design for the Next Generation Thermal Barrier Coatings. Annu. Rev. Mater. Res., 2003, 33, pp. 383-417.
Manning Meier, S., Nissley, D. M. & D. K. Thermal Barrier Coating Life Prediction. 1991, 91-GT-40 ed. New York, N.Y. 10017: ASME.
Miller, R.A. Oxidation-Based Model for Thermal Barrier Coating Life. J. Am. Ceram. Soc., 1984, 67, pp. 517-521.
Reed, R. C. The superalloys: fundamentals and applications. Cambridge university press. 2008.
Schweda, M.; Beck, T.; Malzbender, J.; Singheiser, L. Damage evolution of a thermal barrier coating system with 3-dimensional periodic interface roughness: Effects of roughness depth, substrate creep strength and pre-oxidation. Surf. Coat. Technol, 2015, 276, pp. 368-373.
Stecura, S.; Leibert, C.H. U.S. Patent No. 4,055,705. Washington, DC: U.S. Patent and Trademark Office, 1977.
Tsipas, S.A.; Golosnoy, I.O.; Clyne, T. W.; Damani, R. The effect of a high thermal gradient on sintering and stiffening in the top coat of a thermal barrier coating system. J. Therm. Spray Technol., 2004, 13, pp. 370-376.
Vine, R.W.; Sheffler, K.D.; Bevan, C.E. U.S. Patent No. 4,861,618. Washington, DC: U.S. Patent and Trademark Office, 1989.
Copyright (c) 2020 Revista Mexicana de Ingeniería Química
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
By publishing your paper in our journal you are also granting it the copyright of the information that it contains.