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Microstructural Degradation of Thermal Barrier Coatings on an Integrated Gasification Combined Cycle (IGCC) Simulated Film-Cooled Turbine Vane Pressure Surface Due to Particulate Fly Ash Deposition

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Research is being conducted to study the degradation of thermal barrier coatings (TBC) employed on IGCC turbine hot section airfoils due to particulate deposition from contaminants in coal syn-thesis gas (syngas). West Virginia University (WVU) had been working with US Department of Energy, National Energy Technology Laboratory (NETL) to simulate deposition on the pressure side of an IGCC turbine first stage vane. To simulate the contaminant deposition, several TBC coated, angled film-cooled test articles were subjected to accelerated coal fly ash, which was injected into the flow of a combustor facility with a high pressure (approximately 4 atm) and a high temperature (1560 K) environment. To investigate the degradation of the TBCs due to particulate deposition, non-destructive tests were performed using scanning electron microscopy (SEM) evaluation and energy dispersive X-ray spectroscopy (EDS) examinations. The SEM evaluation was used to display the microstructure change within the layers of the TBC system directly related to the fly ash deposition. The SEM micrographs showed that deposition-TBC interaction made the YSZ coating more susceptible to delamination and promoted a dissolution-reprecipitation mechanism that changed the YSZ morphology and composition. The EDS examination provided elemental maps of the shallow infiltration depth of the fly ash and chemical composition spectrum results which showed yttria migration from the YSZ into the deposition.
Cite this paper
Luo, K. , Nix, A. and Sabolsky, E. (2015) Microstructural Degradation of Thermal Barrier Coatings on an Integrated Gasification Combined Cycle (IGCC) Simulated Film-Cooled Turbine Vane Pressure Surface Due to Particulate Fly Ash Deposition. International Journal of Clean Coal and Energy, 4, 1-10. doi: 10.4236/ijcce.2015.41001. 
 

[1] Padture, N.P., Gell, M. and Jordan, E.H. (2002) Thermal Barrier Coatings for Gas-Turbine Engine Applications. Sci- ence AAAS, 296, 280-284. http://dx.doi.org/10.1126/science.1068609
[2] Schulz, U., Leyens, C., Fritscher, K., Peters, M., Saruhan-Brings, B., Lavigne, O., Dorvaux, J.-M., Poulain, M., Mévrel, R. and Caliez, M. (2003) Some Recent Trends in Research and Technology of Advanced Thermal Barrier Coatings. Aerospace and Technology, 7, 73-80.
[3] Levi, C.G., Hutchinson, J.W., Vidal-Sétif, M.-H. and Johnson, C.A. (2012) Environmental Degradation of Thermal- Barrier Coatings by Molten Deposits. MRS Bulletin, 37, 932-941. http://dx.doi.org/10.1557/mrs.2012.230
[4] Wellman, R.G. and Nicholls, J.R. (2000) Some Observation on Erosion Mechanisms of EB PVD TBCs. Wear, 242, 89-96. http://dx.doi.org/10.1016/S0043-1648(00)00391-4
[5] Drexler, J.M., Gledhill, A.D., Shinoda, K., Vasiliev, A.L., Reddy, K.M., Sampath, S. and Padture, N.P. (2011) Jet Engine Coatings for Resisting Volcanic Ash. Advanced Materials, 23, 2419-2424. http://dx.doi.org/10.1002/adma.201004783
[6] Murphy, R.G., Nix, A.C., Lawson, S.A., Straub, D. and Beer, S.K. (2012) Preliminary Experimental Investigation of the Effects of Particulate Deposition on IGCC Turbine Film-Cooling in a High-Pressure Combustion Facility. ASME Turbo Expo 2012: Turbine Technical Conference and Exposition, 4, 979-986. http://dx.doi.org/10.1115/GT2012-68806
[7] Hass, D. (2012) Thermal Barrier Coating Environmental Durability Enhancement (CMAS). NAVAIR, N06-032.
[8] Gleeson, B., Wang, W., Hayashi, S. and Sordelet, D.J. (2004) Effects of Platinum on the Interdiffusion and Oxidation Behavior of Ni-Al-Based Alloys. Material Science Forum, 461, 213-222. http://dx.doi.org/10.4028/www.scientific.net/MSF.461-464.213
[9] Dorrington, J.R., Bogard, D.G. and Bunker, R.S. (2007) Film Effectiveness Performance for Coolant Holes Imbedded in Various Shallow Trench and Crater Depressions. ASME Turbo Expo 2007: Power for Land, Sea, and Air, 4, 749-758. http://dx.doi.org/10.1115/GT2007-27992
[10] Bons, J., Ameri, A. and Fletcher, T. (2012) Designing Turbine Endwalls for Deposition Resistance with 1400C Combustor Exit Temperatures and Syngas Water Vapor Levels. The Ohio State University. http://dx.doi.org/10.2172/1080354
[11] Lawson, S.A. and Thole, K.A. (2011) Effects of Simulated Particle Deposition on Film Cooling. Journal of Turbomachinery, 133, Article ID: 021009. http://dx.doi.org/10.1115/1.4000571
[12] Dennis, R.A., Shelton, W.W. and Le, P. (2007) Development of Baseline Performance Values for Turbines in Existing IGCC Applications. ASME Turbo Expo 2007: Power for Land, Sea, and Air, 2, 1017-1049. http://dx.doi.org/10.1115/GT2007-28096
[13] Murphy, R.G. (2012) Experimental Investigation of Particulate Deposition on a Simulated Film-Cooled Turbine Vane Pressure Surface in a High Pressure Combustion Facility. M.S. Thesis, West Virginia University, Morgantown.
[14] Murphy, R.G., Nix, A.C., Lawson, S.A., Straub, D. and Beer, S.K. (2013) Investigation of Factors That Contribute to Deposition Formation on Turbine Components in a High-Pressure Combustion Facility. ASME Turbo Expo 2013: Turbine Technical Conference and Exposition, 3B, V03BT13A027.
[15] Luo, K., Nix, A.C., Kang, B.S. and Otunyo, D.A. (2014) Effects of Syngas Particulate Fly Ash Deposition on the Mechanical Properties of Thermal Barrier Coatings on Simulated Film-Cooled Turbine Vane Components. International Journal of Clean Coal and Energy.
[16] Peng, H., Wang, L., Guo, L., Miao, W., Guo, H. and Gong, S. (2012) Degradation of EB-PVD Thermal Barrier Coatings Caused by CMAS Deposits. Progress in Natural Science: Materials International, 22, 461-467. http://dx.doi.org/10.1016/j.pnsc.2012.06.007
[17] Bons, J.P., Crosby, J., Wammack, J.E., Bentley, B.I. and Fletcher, T.H. (2007) High-Pressure Turbine Deposition in Land-Based Gas Turbines from Various Synfuels. Journal of Engineering for Gas Turbines and Power, 129, 135-143. http://dx.doi.org/10.1115/1.2181181              eww141216lx
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