The aim of this paper is to investigate the WC-10Co-4Cr coatings reinforced with 5 % and 10 yttria-stabilized zirconia (Y2O3/ZrO2; YSZ) nanoparticles deposited on CA6NM turbine steel by using high-velocity oxy-fuel (HVOF) thermal spraying technique. In HVOF technique, hot jet semi-solid particles strikes against workpiece creates a layer coating varying thickness substrate material. fabricated ...

Microstructures of yttria stabilized zirconia thin fi lms deposited by aerosol assisted chemical vapor deposition (AA-CVD) are correlated with the thermal decomposition behavior of the corresponding metal precursors, zirconium and yttrium 2,4-pentanedionate. Process conditions of AA-CVD are investigated with the aim of producing dense and compact YSZ thin fi lms for applications as gas-tight el...

Using Sm-doped Ceria electrolytes (SDC) in SOFCs (solid oxide fuel cell), the open circuit voltage (OCV) becomes lower than the Nernst voltage (Vth), which is obtained using Yttria-stabilized Zirconia (YSZ) electrolytes. Classically, OCV is calculated with Wagner’s equation. However, experimental verification of leakage currents using SDC electrolytes is necessary, both qualitatively and quanti...

An amperometric sensor based on yttria-stabilized zirconia (YSZ) and an oxidebased sensing electrode (SE) was examined for the detection of propene. Among the various oxide-based SEs tested, ZnO (+8.5 wt.% Pt) was found to give good sensitivity and selectivity to C3H6 at 600°C. A novel measuring method named “pulsed-potential method” was adopted here to obtain improved sensing characteristics. ...

The mixed potential response for NO and NO2 from two different oxide electrodes on yttria-stabilized zirconia (YSZ) was examined at 500 jC. The two electrodes were La0.6Sr0.4Fe0.8Co0.2O3 (LSFCO) and Cr2O3. Sensors made with LSFCO electrodes had consistently lower sensitivity towards NOx as compared to those with Cr2O3 and the focus of this paper is to understand the fundamental reasons for the ...

A triple-layer composite membrane with porous-dense-porous structure was proposed to develop a high performance membrane reactor. The triple-layer composite membrane consists of a porous Sr0.7Ba0.3Fe0.9Mo0.1O3 δ (SBFM) layer, a dense 0.5 wt% Nb2O5-doped SrCo0.8Fe0.2O3 δ (SCFNb) layer and a porous La0.8Sr0.2MnO3 δ–yttria stabilized zirconia (LSM/YSZ) layer. The porous layers can effectively redu...

Modern gas turbine hot sections need to be protected from elevated temperature and damaging environments. This protection starts as a typically two layer coating system, the base layer or bond coat (BC) acts as a corrosion barrier and a kind of buffer for the thermal mismatch between the base material and the second top thermally protective layer or Thermal Barrier Coating (TBC). The BC is norm...

The technique of electrospinning was employed to fabricate uniform 1-D inorganic–organic composite nanofibers from alcoholic solutions containing polyvinyl pyrrolidone (PVP) and suitable aqueous precursors of yttrium and zirconium ions. Upon firing and sintering under carefully pre-selected time-temperature profiles, yttria-stabilized zirconia nanofibers retaining the original morphological fea...

Electrochemical analysis allows in situ characterization of solid oxide electrochemical cells (SOCs) under operating conditions. However, the SOCs that have been analyzed in this way have ill-defined or uncommon microstructures in terms of porosity and tortuosity. Therefore, the nano-scale characterization of SOCs with respect to three-phase boundaries has been hindered. We introduce novel in s...

Zirconia electrodes with dendritic patterns were fabricated by stereolithographic additive manufacturing (STL-AM). A solid electrolyte of yttria-stabilized zirconia (YSZ) was selected for oxygen separation in the molten salt electrolysis aluminum smelting without carbon dioxide excretion. Thereafter, 4, 6, 8 and 12-coordinated structures composed cylindrical lattices designed as computer graphi...