In solid oxide fuel cells (SOFCs) and electrolysis (SOECs), the substantial performance degradation of nickel (Ni) - yttria-stabilized zirconia (YSZ) electrode has been a growing challenge for commercialization. The microstructure Ni-YSZ is not stable during long-term operation due to Ni phase redistribution. present study, operando observations patterned film electrodes under SOFC, SOEC revers...

The aim of this in vitro study was to evaluate the effect of silica and aluminosilicate nanocomposite coating of zirconia-based dental ceramic by a sol-gel dip-coating technique on the bond strength of veneering porcelain to the yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) in vitro. Thirty Y-TZP blocks (10 mm ×10 mm ×3 mm) were prepared and were assigned to four experimental groups...

Thermal barrier coatings (TBCs) prolong the durability of gas turbine engine components and enable them to operate at high temperature. Several degradation mechanisms limit TBCs during their service. Since atmospheric plasma spray (APS) processed 7–8 wt.% yttria stabilized zirconia (YSZ) widely utilized for applications are susceptible erosion damage, this work aims evaluate influence porosity ...

Metal sulfate formation is one of the major challenges to the emission aftertreatment catalysts. Unlike the incredibly sulfation prone nature of Pd to form PdSO4, no experimental evidence exists for PtSO4 formation. Given the mystery of nonexistence of PtSO4, we explore PtSO4 using a combined approach of an evolutionary algorithm based search technique and quantum mechanical computations. Exper...

Ni coarsening in the Ni/yttria-stabilized zirconia (YSZ) fuel electrode of solid oxide cells (SOCs) is a major cause long-term performance degradation. Phase-field modeling powerful tool for studying complex 3D structures SOC electrodes. In this work, we present study aimed at validating phase-field model, comparing simulation results with time-dependent ex-situ tomographic data. Three equilibr...

This paper presents finite element analysis (FEA) of a coated and uncoated cylinder heads of a diesel engine to examine the distribution of temperature and stress. A thermal barrier coating system was applied on the combustion chamber of the cylinder heads, consists of two-layer systems: a ceramic top coat (TC), made of yttria stabilized zirconia (YSZ), ZrO2-8%Y2O3 and also a metallic bond coat...

This paper describes a new multilayer TBC that incorporates a 10 μm-thick oxygen barrier layer of yttrium–aluminum garnet (YAG) into a typical YSZ TBC system. The thermal conductivity of as-sprayed YAG/YSZ coatings was reduced due to excessive porosity and amorphous areas in the YAG layer. After long-term heat treatments, the conductivity of the multilayer was unaffected by the presence of YAG....

The aim of this work is to synthesize and investigate the performance of yttria-doped zirconia solgel coatings in the chemical corrosion prevention of zircaloy-4 (zirconium alloy) in a 1 N H2SO4 environment. The influence of four different molar ratios of water to alkoxide, namely 1, 4, 12, and 20, on the coating quality and its corrosion prevention performance was investigated. Differential th...

Crystal orientation is the key aspect of epitaxially grown ceramic thin films because it significantly affects their properties. In this study, evaluation thin-film using scanning transmission electron microscopy moiré fringes (SMF) demonstrated. The SMF result from combination crystal lattice in bright-field image and raster scanned beam. As reflect against lines, possible to observe distribut...