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Degradation of SPS-Fabricated YSZ and Nd2O3-YSZ Ceramics in Supercritical Water
Journal of Materials Engineering and Performance, 2016Zirconia (ZrO2) ceramics are being considered as a candidate material for thermal insulating barriers in pressure tubes used in the supercritical water (SCW) nuclear reactors. However, the literature suggests that zirconia may undergo a detrimental phase transformation which is accelerated in aqueous environments.
A. Siebert-Timmer, L. Bichler
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Structure - Property Relationships of Ni/YSZ and Ni/(YSZ+TiO2) Cermets
Fuel Cells, 2001Cermets composed of nickel metal and Y2O3-ZrO2-TiO2 ternary ceramics were investigated by X-ray diffraction, dilatometry, electrical and microstructural measurements and are regarded as improved anode materials with respect to long-term stability. With increasing titania content it was possible to minimise the electrical and microstructural changes ...
D. Skarmoutsos +2 more
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Effect of YSZ fiber addition on microstructure and properties of porous YSZ ceramics
Journal of Materials Science, 2012Yttria-stabilized zirconia (YSZ) fiber was introduced as the reinforcement for porous YSZ ceramics fabricated by tert-butyl alcohol-based gel-casting process and pressureless sintering. Effect of YSZ fiber addition on the microstructure and properties of porous YSZ ceramics was studied systematically.
Yanhao Dong, Chang-An Wang, Jun Zhou
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Microstructural evolution of YSZ electrolyte aerosol-deposited on porous NiO-YSZ
Journal of the European Ceramic Society, 2012Abstract Dense, crack-free, ∼7.5 μm thick, 8 mol% yttria stabilized zirconia (YSZ) film was aerosol deposited on porous NiO-YSZ anode substrates at room temperature without additional high-temperature sintering. The films’ microstructures and gas permeability were observed after annealing at various temperatures.
Jong-Jin Choi +7 more
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YSZ‐Induced Crystallographic Reorientation of Ni Particles in Ni–YSZ Cermets
Journal of the American Ceramic Society, 2007Metal–ceramic interfaces in Ni–YSZ (YSZ, yttria‐stabilized zirconia)‐textured porous cermets prepared by reduction of NiO–YSZ directionally solidified eutectics have been studied by transmission electron microscopy and X‐ray pole figure experiments. Before reduction of NiO, the interfacial plane is
Miguel A. Laguna‐Bercero +1 more
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Three-Dimensional EBSD Analysis of YSZ, NiO-YSZ and Ni-Alloy
MRS Proceedings, 2012ABSTRACTIn this report, a method is discussed to perform successive milling on yttria-stabilized zirconia (YSZ), NiO-YSZ and Ni-alloy at the intervals of 85 nm 50 nm and 100 nm, respectively using a focused ion beam (FIB) followed by electron backscatter diffraction (EBSD) analysis on each slice.
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Effects of impurities on microstructure in Ni/YSZ–YSZ half-cells for SOFC
Solid State Ionics, 2003Long-term properties of Ni/yttria-stabilized zirconia (YSZ) cermet anode+YSZ electrolyte pellet (d=7.4 mm) half-cells were evaluated experimentally. Two commercial NiO powders containing different levels of impurities were used for the anodes. The durability was evaluated at temperatures of 850 °C over 1500–1800 h in H2 with 1–3% H2O under an anodic ...
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