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Showing 1 to 20 of 57 for “"Yttria stabilized zirconia"”.
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Low-energy excitations in yttria-stabilized zirconia
Thermal conductivity, specific heat, dielectric constant and thermal expansion measurements below 2 K on single crystal samples of Zr02 :Y203 with 10.5, 16 and 18 mole % Y2O3 contents exhibit properties typical of glasses. The presence of glass-like excitations having a broad spectrum of energies …
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Reaction sintering of yttria stabilized zirconia via nickel oxide
Includes bibliographical references (pages 49-52).
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Electrochemical vapor deposition of yttria stabilized zirconia on porous graphite substrates
The main goal of this study was to deposit stabilized zirconia films on a porous graphite substrate by electrochemical vapor deposition using CO as the oxidizing agent. Five experimental variables, deposition temperature, deposition time, gas flow rate, anode H$\sb2$/Ar ratio, and substrate …
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Electrochemical vapor deposition of a graded titanium oxide-yttria stabilized zirconia layer
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1996.
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Computational studies of cation and anion ordering in cubic yttria stabilized zirconia
… system of interest. The cluster expansion of the yttria stabilized zirconia system considers 447 configurations across the ZrO2-Y203 composition range. The effective cluster interaction for pair clusters show electrostatic repulsion between anions and little interaction between cations. Triplet …
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Fabrication of sensitive high-temperature superconducting bolometers on a yttria-stabilized zirconia membrane
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1995.
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Electrochemical Investigation of Thin Nickel, Copper and Silver Films Interfaced with Yttria-Stabilized Zirconia
… copper and silver thin films interfaced with yttria stabilized zirconia (YSZ) solid electrolyte was accomplished to determine their response to polarization in dilute oxygen environments at 350 °C and assess their viability for electrochemical promotion of catalysis (EPOC). Polycrystalline YSZ …
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Microfabrication methods to improve the kinetics of the yttria stabilized zirconia -- platinum -- oxygen electrode
… of platinum electrodes on the surface of yttria stabilized zirconia electrolytes. Platinum electrodes with well controlled geometry were sputtered onto the surface of bulk YSZ and onto sputtered YSZ thin films. An unexpected result was found whereby YSZ films of composition Y0.09Zr0.91O2-x …
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Deposition of yttria-stabilized zirconia thermal barrier coatings by laser-assisted plasma coating at atmospheric pressure
… this study, the APP is utilized to deposit the yttria-stabilized zirconia (YSZ) thermal barrier coatings (TBC) at atmosphere pressure. These coatings can be applied on silicon wafers, and multi-layer nickel-based superalloy substrates (René N5), by a new deposition technique called …
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Heat treatment and additive effects on microstructure and properties of tetragonal-(2-3 mol%) yttria-stabilized-zirconia
… behavior of predominantly-tetragonal (2-3 mol%) yttria-stabilized-zirconia (YSZ) was investigated. Preliminary studies on compositional effects were studied in 2-3 mol% YSZ prepared from a mixed oxide powder. Microstructure-property relationships were then investigated as a function of heat …
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Non-destructive Microstructural Evaluation Of Yttria Stabilized Zirconia, Nickel Aluminides And Thermal Barrier Coatings Using Electrochemical Impedance Spectroscopy
There has been an urge for increasing the efficiency in advanced gas turbine engines. To fulfill these needs the inlet gas temperatures should be increased in the gas turbine engines, thermal barrier coatings (TBCs) have gained significant applications in increasing the gas inlet temperatures. …
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Assessing the feasibility of yttria-stabilized zirconia in novel designs as mandibular anterior fixed lingual retention following orthodontic treatment.
… of this study is to explore the feasibility of yttria-stabilized zirconia (Y-TZP) in fixed lingual retention as an alternative to stainless steel. Exploratory Y-TZP specimens were milled to establish design parameters. Next, specimens were milled according to ASTM standard C1161-13 and subjected …
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Study of microstructure effect on the thermal properties of Yttria-stabilized-Zirconia thermal barrier coatings made by atmospheric plasma spray and pressing machine
… temperature and thus lead to better efficiency. Yttria-Stabilized-Zirconia (YSZ), a material with low thermal conductivity, is commonly used as the top coat layer to provide the thermal barrier effect. In this dissertation the thermo-physical properties of a variety of TBCs samples made out of …
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Characterization Study of Plasma Spray Attachment of Intrinsic Fabry-Perot Interferometric Sensors in Power Generation Applications
… tested and modeled, a nickel based alloy and yttria-stabilized zirconia. The material properties of the deposits and the thermal stresses in the system were evaluated to determine attachment lifetime of the sensors. The encapsulated sensors' signals were collected before and after plasma …
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Atomistic and finite element modeling of zirconia for thermal barrier coating applications
Zirconia (ZrO2) is an important ceramic material with a broad range of applications. Due to its high melting temperature, low thermal conductivity, and high-temperature stability, zirconia based ceramics have been widely used for thermal barrier coatings (TBCs). When TBC is exposed to thermal …
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Characterization of Iron-Chromium-Aluminum surface coated Zircaloy-2 under high temperature steam
… have been deposited on Zircaloy-2 (Zry2) and yttria-stabilized zirconia (YSZ) by magnetron sputtering, and they have been tested with respect to the oxidation weight gain in high temperature steam. In 700C steam environment, the FeCrAl-coated Zry2 samples have significantly reduced the …
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Oxygen Transport in Vapor-Deposited Tin-Doped Indium Oxide Films (Diffusion, Electrochemical)
… of Sn-doped In(,2)O(,3) were vapor deposited on yttria-stabilized zirconia solid electrolytes. Oxygen transport through the films was monitored between 1100 and 1300(DEGREES)K near atmospheric oxygen pressures using electrochemical techniques. An attempt was made to correlate the transport data …
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Microstructure, residual stress, and mechanical properties of thin film materials for a microfabricated solid oxide fuel cell
… of a candidate solid electrolyte: Yttria Stabilized Zirconia (YSZ). Stress and structure of reactive RF sputtered YSZ films are explored as a function of thickness (5nm - 1000nm), deposition pressure (5mtorr - 1OOmtorr), and substrate temperature (room temperature, 3000C and 6000C). …
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Calibration of YSZ sensor for the measurement of oxygen concentration in Lbe
… style voltametric oxygen sensors, with YSZ (Yttria Stabilized Zirconia) as electrolyte and molten bismuth saturated with oxygen as reference was selected. An instrumentation system was designed specifically for calibrating the YSZ sensor and measure oxygen concentration in LBE. An initial …
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