Crystalline yttria-stabilized zirconia (YSZ) gate dielectrics have been successfully fabricated on silicon wafers. By carefully controlling the annealing condition, the crystalline YSZ gate dielectrics show promising performances following the rapid thermal annealing process. The equivalent electrical oxide thickness only increases about 2.0 Å after annealing in O2 gas, while the leakage curren...

Solid oxide fuel cells (SOFCs) are promising electrochemical energy conversion devices owing to their high power generation efficiency and environmentally benign operation. Micro-tubular SOFCs, which have diameters ranging from a few millimeters to the sub-millimeter scale, offer several advantages over competing SOFCs such as high volumetric power density, good endurance against thermal cyclin...

Functionally graded materials (FGM) in the form of layered structure consisting of yttria stabilized zirconia (8 mol% Y2O3) and nickel were fabricated by spark plasma sintering procedure. The relative density, linear shrinkage and Vickers hardness of each layer of graded materials were measured. The microstructure and the composition of these components were studied. The results obtained show t...

The paper discusses optimising work on a method of processing ceramic / metal composite coatings for various applications and is based on preliminary work on processing anodes for solid oxide fuel cells (SOFCs). The composite coating is manufactured by the electroless co-deposition of nickel and yttria stabilised zirconia (YSZ) simultaneously on to a ceramic substrate. The effect on coating cha...

Residual stresses’ magnitude generated by deposition, quenching stress, thermal stress operation temperature, and infiltration in the barrier coating (TBC) of gas turbines was determined. A manufactured deposition two layers, CoNiCrAlY yttria-stabilized zirconia (YSZ), on an AISI 304 stainless steel substrate. The deposited using HVOF gun YSZ atmospheric plasma spray (APS). TBCs were heat-treat...

A new multi-layered thermal barrier coating system (TBCs) containing gadolinium zirconate (GZ, Gd2Zr2O7) and yttria-stabilized zirconia (YSZ) was developed using suspension plasma spray (SPS) to improve the overall cycling performance. This study focuses on cracking behavior of GZ/YSZ TBC after exposure find out key factors that limit its lifetime. Different behaviors were detected depending tr...

The failure of plasma-sprayed thermal barrier coatings (TBCs) during service is usually related to the cracking behavior. In this study, TBCs were prepared with two kinds agglomerated sintered yttria-stabilized zirconia (YSZ) powders different particle sizes. evolution mechanical properties and crack propagation behavior whole life stage studied by a shock test. effect powder size on was analyz...

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...

Residual stress arisen in fabrication process of Double-Ceramic-Layer Thermal Barrier Coating System (DCL-TBCs) has a significant effect on its quality and reliability. In this work, based on the practical fabrication process of DCL-TBCs and the force and moment equilibrium, a theoretical model was proposed at first to predict residual stress generation in its fabrication process, in which the ...

Abstract Yttria-stabilized zirconia (YSZ) coatings and Al 2 O 3 -YSZ were prepared by atmospheric plasma spraying (APS). Their microstructural changes during thermal cycling investigated via scanning electron microscopy (SEM) equipped with backscatter diffraction (EBSD) X-ray (XRD). It was found that the microstructure of two different, including crystallinity, grain orientation, phase, phase t...