The microstructure and morphology of solid-oxide fuel-cell electrodes are very complex but important because they strongly affect the electrical performance of the cell. In this work the high-resolution X-ray nanotomography technique is applied to reconstruct the three-dimensional microstructure of a (La(0.8)Sr(0.2))(0.95)MnO(3) yttria-stabilized zirconia composite cathode. Some key microstruct...

UNLABELLED Laser-based diagnostics and therapeutics show promise for many neurological disorders. However, the poor transparency of cranial bone (calvaria) limits the spatial resolution and interaction depth that can be achieved, thus constraining opportunity in this regard. Herein, we report preliminary results from efforts seeking to address this limitation through use of novel transparent cr...

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...

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...

In this work, thin film yttria-stabilized zirconia [YSZ] solid electrolytes were sputtered onto insulating substrates at room temperature and 600oC in order to produce different average grain sizes (~15-50 nm). For reference, polished samples of single crystal and bulk, poly-crystalline YSZ were also used. Platinum film electrodes were then sputtered on top and lithographically patterned to giv...

A bioactive two-layer coating consisting of hydroxyapatite (HA) and yttria-stabilized zirconia (YSZ) was investigated on cylindrical polyetheretherketone (PEEK) implants using ion beam assisted deposition (IBAD). Post-deposition heat treatments via variable frequency microwave annealing with and without subsequent autoclaving were used to crystallize the as-deposited amorphous HA layer. Microst...

The calculations performed in this study indicate that efficient deposition of tetragonal yttria-stabilized zirconia ~YSZ! by chemical vapor deposition ~CVD! is feasible using metal chloride precursors ~Zr-Y-C-O-H-Cl system!. As reported in the literature, this work demonstrates that high oxygen content is necessary to efficiently utilize metal chloride precursors for depositing tetragonal YSZ ...

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...