Thermal barrier coatings (TBCs) have been investigated both experimentally and through simulation for mixing controlled combustion (MCC) concepts as a method reducing heat transfer losses increasing cycle efficiency, but it is still very active research area. Early studies were inconclusive, with different groups discovering obstacles to realizing the theoretical potential. Nuanced papers shown...

Abstract There is a strong driving force to improve the production efficiency of thermal barrier coatings (TBCs) manufactured via air plasma spray (APS). To address this need, high-enthalpy APS torch Axial III Plus was employed successfully manufacture TBCs by spraying commercial YSZ feedstock at powder feed rate 100 g/min using an optimized set N 2 /H parameters; which yielded impressive depos...

Abstract This work presents computational models of ingot evaporation for electron-beam physical vapour deposition (EB-PVD) that can be applied to the and development thermal barrier coatings (TBCs). TBCs are insulating protect aero-engine components from high temperatures, which above component’s melting point. The advanced is fuelled by need improve engine efficiency increasing operating temp...

Glassy deposits mainly comprising of calcium–magnesium–alumina–silicate (CMAS) accelerate the spallation thermal barrier coatings (TBCs). In this work, an Al2O3 layer was produced on yttria-stabilized zirconia (YSZ) coating by plasma spray–physical vapor deposition (PS–PVD). The effects processing parameters during PS–PVD process microstructures deposited were investigated. A homogeneous with p...

In recent years plasma-sprayed coatings and polymer coatings have found wide application in manufacturing. Although the quality of the coatings improved over the years, there is a need for reliable NDE techniques to assess the quality and test the integrity of these coatings. Most existing techniques are not suitable for real-time applications. The introduction of synchronous thermal wave video...

This study focused on the numerical simulation of distribution residual stress in yttria-stabilized zirconia (YSZ) coatings prepared with atmospheric plasma spraying (APS). We particularly investigated around interface between top coat and bond coat. During thermal spray deposition, droplets particles deposit substrate a complex manner, causing waviness non-uniform distribution. Therefore, is a...

The diesel / gasoline engine rejects about two thirds of the heat energy of the fuel, one-third to the coolant, and one third to the exhaust, leaving only about one-third as useful power output. Theoretically if the heat rejected could be reduced, then the thermal efficiency would be improved, at least up to the limit set by the second law of thermodynamics. Low Heat Rejection (LHR) engines aim...

The solid particle erosion behavior of electron-beam physical vapor deposition (EB-PVD) thermal barrier coatings (TBCs) was numerically evaluated under cycling conditions. rates were calculated based on the mechanics-based formulae where model parameters are fitted to temperature-process-dependent test data available in literature. A stochastic approach applied simulate toward service then vali...

Nanostructured ceramic coatings produced by plasma spray processes are being developed for a wide variety of applications that require resistance to wear, erosion, cracking and spallation [1]. In addition the process is being developed to make near net shaped ceramic performs by dissolution of the substrate after spraying. Attractive properties associated with a nanostructure (in general referr...