Either to obtain desirable microstructures by adjusting processing parameters or predict the properties of a thermal barrier coating (TBC) according its microstructure, fast and reliable quantitation microstructure is imperative. In this research, machine-learning-based approach—a deep convolution neural network (DCNN)—was established accurately quantify air-plasma-sprayed (APS) TBCs based on 2...

The effects of the bond coat species on the delamination or fracture behavior in thermal barrier coatings (TBCs) was investigated using the yclic thermal fatigue and thermal-shock tests. The interface microstructures of each TBC showed a good condition without cracking or delamination after flame thermal fatigue (FTF) for 1429 cycles. The TBC with the bond coat prepared by the air-plasma spray ...

Abstract The surface fracture toughness is an important mechanical parameter for studying the failure behavior of air plasma sprayed (APS) thermal barrier coatings (TBCs). As APS TBCs are typical multilayer porous ceramic materials, direct applications traditional single edge notched beam (SENB) method that ignores those structural characters may cause errors. To measure more accurately, effect...

The results of research work on the application coatings designed to protect working surfaces machine parts and mechanisms operating under conditions hydroabrasive cavitation wear are presented. Coatings were produced by supersonic atmospheric plasma spraying powder materials using air as a gas. experimental list was chosen taking into account experience authors in protecting details propulsion...

An approach to improve the lifetime of air plasma sprayed (APS) thermal barrier coatings (TBCs) by modifying the interfacial microstructure has been reported. The laser powder deposition technique was employed to fabricate the mesh structure (with the same composition as the bond coat) at the ceramic–substrate interface. After thermal cycling test, the APS TBCs with the mesh exhibited a much le...

High-entropy alloys (HEAs) have great potential to be used as high-temperature materials and in coating material applications due their combination of strength, ductility, thermal stability, wear, oxidation resistance. In this work, a new HEA alloy based on NiCoCrAlSi composition was designed deposited into metallic coatings by high-velocity oxy-fuel (HVOF) air plasma spray (APS) processes, wit...

The directions of research in the development process plasma spraying material are substantiated. theoretical basis for improving technology spraying.

The need for new solutions electrical insulation is growing due to the increased electrification in numerous industrial sectors, opening door innovation. Plasma spraying a fast and efficient way deposit various ceramics as insulators, which are used conditions where polymers not suitable. Alumina (Al2O3) among most employed coating industry since it exhibits good dielectric properties, high har...

Abstract Coatings prepared from chromia-rich (Al,Cr) 2 O 3 solid solution (ss) feedstock powders are intended to improve the properties of Cr coatings, but rarely studied so far. In this work, processability a commercial powder containing 78 wt.% by atmospheric plasma spraying (APS), corresponding coating microstructures and were investigated. Possible further improvements expected blending wit...

Abstract For more than 6 decades, thermal barrier coatings have been used to protect structural parts in both stationary and aviation gas turbines. These allow the use of significant higher operation temperatures hence increased efficiencies. In 1970s, yttria-stabilized zirconia (YSZ) was identified as outstanding material for this application. As major deposition technologies electron beam phy...