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Meeting Materials Science & Technology 2019
Symposium Sandphobic Thermal/Environmental Barrier Coatings
Presentation Title Processing of Laser Surface Modification of Functionally Graded Alumina/CYSZ Thermal Barrier Coating
Author(s) Fatih Kirbiyik, Gultekin Goller
On-Site Speaker (Planned) Fatih Kirbiyik
Abstract Scope Thermal barrier coatings (TBCs) are used on hot section of gas turbine engines to provide thermal insulation and to protect them from rapid degradation. The oxidation of the bond coat, the thermal mismatch stress, delamination cracking, corrosion and erosion are the main factors degradation of thermal barrier coatings. Functionally graded design of thermal barrier coatings improves thermal mismatch stress that causes delamination. In plasma-sprayed TBC system, laser glazing is promising method for solving oxidation, corrosion and erosion problems. In this study, alumina/CYSZ (ceria-yttria-stabilized zirconia) ceramic top layer was produced by air plasma spraying (APS) method with functionally graded design. Laser surface modification processing was applied by using CO2 laser to enhance surface properties of TBC. After glazing of TBC with different laser power, glazing speed and laser distance parameters, the best glazing parameters were determined by investigating microstructure, mechanical and roughness properties of ceramic top coating surface.


Army Advances in Sandphobic Thermal/Environmental Barrier Coatings
CMAS-Resistant YSZ-Rare Earth Oxide Composite Coatings
CMAS Removal by Spectrally Guided Laser Ablation
Development of Novel CMAS/VA Resistant TBCS: Influence of Chemical Composition and the Microstructure
Effects of Silicate Melt Chemistry on Thermochemical Interactions with Thermal Barrier Oxides
High Resolution Non-invasive Characterization of Calcium-magnesium-alumino-silicate Infiltration in Thermal Barrier Coatings
Multiphase Thermal Barrier Coatings for Broad-base Resistance to Silicate Deposits
Multlayer, Multifunctional, Thermo-structural Coatings to Mitigate Molten Silicate Attack in Aeroengines
Non-silicate Ceramic T-EBC Coatings for SiC CMCs
Numerical Investigation of Particle Deposition in Gas Turbine Blades
Processing of Laser Surface Modification of Functionally Graded Alumina/CYSZ Thermal Barrier Coating
Progress and Challenges in Understanding CMAS Attack and Developing CMAS-phobic T/EBCs
Turbulence Modulation Effects in Particle-laden Shear Driven Flows and its Impact on Material Deposition

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