... advanced combustion technologies, capable of elevated peak cylinder pressures and thermal efficiencies, thermal barrier coatings, exhaust waste heat recovery via SuperTurbo™ turbocompounding, and hybrid energy assisting and recovery through both mechanical and electrical systems. Following the concept...

...H. M. Tawancy; Luai M. Al-Hadhrami It is known that the relative performance of thermal barrier coatings is largely dependent upon the oxidation properties of the bond coat utilized in the system. Also, the oxidation properties of diffusion-type bond coats (aluminides and their modifications...

... content as observed in all sintered samples. 09 04 2011 12 04 2011 01 09 2011 01 09 2011 scanning electron microscopy thermal barrier coatings titanium compounds X-ray diffraction Young's modulus yttrium compounds zirconium compounds The present state-of-the-art...

... or for thermal cyclic tests. The former generally provides data for creep of the superalloy and the overall performance, and the later provide data for thermal barrier coating (TBC) spallation as a function of thermally grown oxide thickness, surface roughness, temperature, and thermal mismatch between...

... (EB-PVD) coatings. In contrast to EB-PVD, PS-PVD incorporates the vaporized coating material into a supersonic plasma plume. Due to the forced gas stream of the plasma jet, complex shaped parts like multi-airfoil turbine vanes can be coated with columnar thermal barrier coatings using PS-PVD. Even...

...Nagaraja S. Rudrapatna; Benjamin H. Peterson; Daniel Greving Modern gas turbine combustors are made of high temperature alloys, employ effusion cooling, and are protected by a thermal barrier coating (TBC). Gas turbine combustor failure modes, such as TBC spallation, cracking, and distortion...

...Sergio Filippi; Peter J. Torvik Ceramic coatings applied by air plasma spray or electron beam techniques as thermal barrier coatings or to improve the erosion or corrosion resistance of blades in gas turbine engines are found to add damping to the system. However, such coatings display nonlinear...

..., an equation for estimating the temperature of the blade is derived. An analysis of another in-service blade with a thermal barrier coating is carried out. The aluminum content decreases below the bond coat surface due to Al diffusion caused by the Al-oxide formation. This results in the formation of an Al...

...C. Rinaldi; L. De Maria; M. Mandelli This paper describes the application of a double-sided approach to assess the spent life fraction of thermal barrier coatings (TBCs) at local positions of ex-service blades with NiCoCrAlY-Re bond coat and EB-PVD TBC. A life prediction code implemented...

...Michael A. Marr; James S. Wallace; Larry Pershin; Sanjeev Chandra; Javad Mostaghimi A novel metal-based thermal barrier coating was tested in a spark-ignition engine. The coating was applied to the surface of aluminum plugs and exposed to in-cylinder conditions through ports in the cylinder wall...

...H. M. Tawancy; Luai M. Al-Hadhrami Current technology of thermal barrier coating systems used in gas turbine blade applications relies on the use of a metallic bond coat, which has a twofold function: (i) it develops a thin layer of aluminum oxide enhancing the adhesion of the ceramic top coat...

...Hans-Peter Bossmann; Sharath Bachegowda; Alexander Schnell A reliable lifetime prediction rule for bondcoat/thermal barrier coating (BC/TBC) coated parts in gas turbine operation is necessary to determine remnant service life. The specimens investigated were coated with MCrAlY plus yttria partially...

... in excess of 50% of the original thickness for combustor components and 10% for nozzle and rotating component airfoils is the upper limit. Protective EBC∕TBCs (thermal barrier coatings) for Si C ∕ Si C CMCs and improved FGIs for oxide∕oxide CMCs. At high firing temperatures ( TIT...

... metal temperature thermal barrier coatings Future developments in integrated gasification combined cycle (IGCC) plants envision the use of syngas (SG), hydrogen, and oxygen in various proportions as an approach in minimizing C O 2 and N O x emissions. For all fuel...

...Rémy J. L. Steenbakker; Jörg P. Feist; Richard G. Wellman; John R. Nicholls Thermal barrier coatings (TBCs) are used to reduce the actual working temperature of the high pressure turbine blade metal surface. Knowing the temperature of the surface of the TBC and at the interface between the bondcoat...

... thermal barrier coatings Accurate hot gas path measurements (including combustion diagnostics) are recognized as a major need for the assessment of engine component health and performance. This fact has been highlighted in a recent study, “The Lab Gap Matrix,” carried out by the European Virtual...

...N. S. Cheruvu; K. S. Chan; D. W. Gandy Thermal barrier coatings (TBCs) have been recently introduced to hot section components, such as transition pieces and the first two stages of turbine blades and vanes of advanced F, G, and H class land-based turbine engines. The TBC is typically applied...

...Xiao Huang Meeting the demands for ever increasing operating temperatures in gas turbines requires concurrent development in cooling technologies, new generations of superalloys, and thermal barrier coatings (TBCs) with increased insulation capability. In the case of the latter, considerable...

...A. L. Heyes; J. P. Feist; X. Chen; Z. Mutasim; J. R. Nicholls This paper describes recent developments of the thermal barrier sensor concept for nondestructive evaluation (NDE) of thermal barrier coatings (TBCs) and online condition monitoring in gas turbines. Increases in turbine inlet temperature...

... on Helicopter Turbine Airfoils Advances in Synthesis and Processes , SAMPLE, 3 , pp. M92 – M101 . Toriz , F. C. , Thakker , A. B. , and Gupta , S. K. , 1988 , “ Thermal Barrier Coatings for Jet Engines ,” presented at the Gas Turbine and Aeroengine Congress Amsterdam, The Netherlands...