In this study, a new pore structure control method for plasma-sprayed thermal barrier coatings (TBCs) through the addition of unmelted, porous yttria-stabilized zirconia (YSZ) particles was investigated. Through unique way feeding powder, two powder feeders were used simultaneously at different positions plasma flame to deposit composite coating in which conventional as matrix and unmelted micr...

Abstract Thermal barrier coatings (TBCs) are widely utilized in gas turbine engines for power generation. In recent years, the application of TBCs automotive has been introduced to improve engine efficiency. Low thermal conductivity and high durability desired coating properties both automotive. Also, suspension plasma spraying (SPS) permits a columnar microstructure that combines properties. H...

Accurate measurement of porosity is crucial for comprehensive performance evaluation thermal barrier coatings (TBCs) on aero-engine blades. In this study, a novel data-driven predictive method based terahertz time-domain spectroscopy (THz-TDS) was proposed. By processing and extracting features from signals, multivariate parameters were composed to characterize the porosity. Principal component...

The infiltration of molten calcium, magnesium, and alumino-silicates (CMAS) into jet engine thermal barrier coatings (TBCs) causes an increased stiffness a destructive phase destabilization eventually leading to thermomechanical failure. Using 3D confocal Raman spectroscopy, the extent thermochemical degradation was identified by mapping monoclinic volume fraction (mPVF) throughout standard EB-...

To understand the oxidation behaviors of NiCrAlY bond coats in thermal barrier coatings (TBCs) under external loads, uniaxial tensile and compressive experiments TBCs air at 900 °C for 100 h were investigated. Then, experimental results explained by first-principles simulation. The showed that rate coat was accelerated stresses. A 0.9 μm thickness, a thermally grown oxide (TGO) layer found with...

Thermal barrier coatings (TBCs) are usually used in high temperature and harsh environment, resulting thinning or even spalling off. Hence, it is vital to detect the thickness of TBCs. In this study, a hybrid machine learning model combined with terahertz time-domain spectroscopy technology was designed predict The signals were obtained from samples prepared laboratory actual turbine blade. pri...

Large degradation in thermal insulation and strain tolerance is a main headache primary cause of failure for plasma-sprayed barrier coatings (TBCs) during service. One mechanism behind such the healing interlamellar pores formed by multiple connections between edges pore, which significantly speeds up exposure. The objective this study to obtain sintering-resistant TBCs tailoring width avoid co...

Local residual stress in thermally grown oxide (TGO) layers is the primary cause of failure thermal barrier coating (TBC) systems, especially TBCs prepared by air plasma spray (APS) with a highly irregular TGO. Herein, distribution and evolution TGO layer APS were investigated as function oxidation time. The was measured from cross-sectional micrographs converted to actual inside coatings befor...

Thermal barrier coating systems (TBCs) are used in gas turbines to prevent high-temperature degradation of metallic materials in the combustor and turbine. One of the main concerns regarding TBCs is poor reliability, and accurate life prediction models are necessary in order to fully utilise the beneficial effects of TBCs. This research project aims at developing deeper understanding of the deg...