Lifetime is a basic support for the thermal insulation function of barrier coatings (TBCs). Therefore, extending life span essential to develop next-generation TBCs. For this objective, columnar structure formed by vertical cracks appears make sense. However, underlying mechanism still unclear. This work scrutinizes influence periodic on cracking behavior in order tailor high strain tolerant A ...

In this study, an extended layerwise/solid-element (XLW/SE) method is developed for the thermo–chemo–mechanical (TCM) coupling problem of aero-engine turbine blade with thermal barrier coatings (TBCs). The consists two parts, layerwise (XLW) and three-dimensional (3D) solid-element (SE) method, which are adopted to formulate governing equations TBCs substrate, respectively. Then, according comp...

TBCs (Thermal Barrier Coatings) are multilayer structures usually consisting of a ceramic layer, known as top coat, arranged on connecting bond which, in turn, is above the substrate to protect. These applied hot section parts gas turbine engines for providing thermal protection. During component life, some oxidation end/or wear phenomena can occur, therefore TBC generally removed and then reap...

Residual stress arisen in fabrication process of Double-Ceramic-Layer Thermal Barrier Coating System (DCL-TBCs) has a significant effect on its quality and reliability. In this work, based on the practical fabrication process of DCL-TBCs and the force and moment equilibrium, a theoretical model was proposed at first to predict residual stress generation in its fabrication process, in which the ...

Abstract Plasma spray-physical vapor deposition (PS-PVD) as a novel process was used to prepare feather-like columnar thermal barrier coatings (TBCs). This special microstructure shows good strain tolerance and non-line-of-sight (NLOS) deposition, giving great potential application in aero-engine. However, due serious service environment of aero-engine, particle erosion performance is weakness ...

Thermal barrier coatings (TBCs) deposited by suspension plasma spraying (SPS) are recognized as a potent method to increase efficiency and extend the life of gas turbines. The unique microstructure SPS provides exceptional mechanical thermal properties, but on other hand, affects sintering TBCs what could lead undesirable changes in properties premature failure. This study attempts characterize...

Thermal barrier coating is critical for thermal insulation technology, making the underlying base metal capable of operating at a melting temperature 1150 °C. By increasing incoming gases, engineers can improve and mechanical performance gas turbine blades piston cylinder arrangement. Recent developments in field coatings (TBCs) have made this material suitable use variety fields, including aer...

The erosion of the unmelted CaO-MgO-Al2O3-SiO2 (CMAS) particle is one dominating factors that causes microcracks in thermal barrier coatings (TBCs) when an aeroengine operates under actual service conditions. provide a pathway for TBCs by molten CMAS particles, which accelerates failure coating. Herein simplified model to mimic YSZ (Y2O3 stabilized ZrO2) particles with high speed proposed. fini...

The improvement of high temperature materials with lower heat transfer coefficients lead to the development thermal barrier coatings (TBCs). One most widely used for is Y2O3 stabilized ZrO2 (Y-TZP) because its excellent shock resistance, low conductivity, and relatively coefficient expansion. aim this work study TBCs mechanical behavior addition SiC into suspension Y-TZP/Al2O3 by acoustic emiss...

Highly scattering plasma-sprayed thermal barrier coatings (TBCs) present a challenge for optical diagnostic methods to monitor TBC delamination because scattering attenuates light transmitted through the TBC and usually degrades contrast between attached and delaminated regions of the TBC. This paper presents a new approach where reflectance-enhanced luminescence from a luminescent sublayer inc...