Abstract MCrAlX powder compositions (M = Ni,Co and X Y, Hf, Si or combination) are often thermally sprayed via vacuum plasma spray (VPS), low pressure (LPPS) high velocity oxy-fuel to produce temperature oxidation hot corrosion resistant bond coats for thermal barrier coatings (TBCs). Cold technology is currently considered as a promising alternative the traditional solutions, having advantage ...

In recent years, with the development of SiC composites in aero-engine hot-end components, environmental barrier coatings (EBCs) have received extensive attention. Moreover, order to elevate service temperature, it is a developing trend apply thermal (TBCs) low conductivity on EBCs coating system form thermal/environmental (T/EBCs). However, combination high coefficient expansion (CTE) TBCs CTE...

In this study, thermal barrier coatings (TBC) consisting of 3.5 mol% Yb2O3-stabilized ZrO2 co-doped with 1 Gd2O3 and Yb2O3 (referred to as GdYb-YSZ) were fabricated by means air plasma spraying. The as-fabricated exhibited a metastable tetragonal (t′) structure. hot-corrosion behavior the GdYb–YSZ TBCs was investigated at 700, 800, 900, 1000 °C for 10 h in presence V2O5 molten salt. During corr...

The purpose of this paper is to study the thermal shock resistance and failure mechanism La2Ce2O7/8YSZ double-ceramic-layer barrier coatings (LC/8YSZ DCL TBCs) under extreme temperature gradients. At high surface temperatures, infrared measuring modules were used determine cycling life insulation LC/8YSZ TBCs gradients by an oxygen–acetylene gas flame testing machine. A viscoelastic model was o...

Yttrium-stabilized zirconia thermal barrier coatings (TBCs) of combustion chambers and piston crowns are used most frequently to increase the chamber temperature internal engine efficiency. The development multilayer metal matrix composite coating is great importance diminish ceramic coating’s brittleness susceptibility degradation providing similar insulation. Our group developing TBCs based o...

Abstract In this paper, (Gd 1− x Y )TaO 4 ceramics had been fabricated by solid-phase synthesis reaction. Each sample was found to crystallize in a monoclinic phase X-ray diffraction (XRD). The properties of were optimized adjusting the ratio Gd/Y. low high-temperature thermal conductivity (1.37–2.05 W·m −1 ·K ), which regulated lattice imperfections. transition temperature higher than 1500 °C....

Thermal barrier coatings (TBCs) based on Yttria-stabilized Zirconia (YSZ) deposited by the solution precursor plasma spray (SPPS) technique have been claimed to exhibit superior durability compared to conventional plasma spraying and even electron-beam physical vapor deposition. This has been attributed to the interesting features, like vertical cracks, nanosized pores, and fine splats that are...

Multilayer thermal barrier coatings (TBCs) on superalloy substrates are comprised of an intermetallic bond coat, a thermally grown oxide (TGO) layer, and a porous zirconia top coat that provides thermal protection. The TGO attains a thickness of 1±10 lm prior to failure, while the bond coat and zirconia layer are each about 50±100 lm thick. The preferred method for manufacturing TBCs comprises ...

Coatings subject to residual compression eventually fail by buckle-driven delamination. The phenomenon is most vivid in thermal barrier coatings (TBCs) used in gas turbines. The failure evolution commences with the formation of a large number of small cracks at geometric imperfections near the interface. These cracks spread upon thermal exposure, particularly upon thermal cycling, because of th...

The preparation of thermal barrier coatings (TBCs) is a complex process involving the integration physics and chemistry, mainly flight behavior deposition molten particles. service life performance TBCs were determined by various factors, especially parameters. In this work, to set up quantitative characterization model between parameters characteristic parameters, ceramic powder particle size,...