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Filtering by: Creator Su, X. Remove constraint Creator: Su, X. Academic Affiliation Mechanical, Industrial, and Manufacturing Engineering Remove constraint Academic Affiliation: Mechanical, Industrial, and Manufacturing Engineering

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  • Development of Cu-based Thin Films for Optoelectronic Applications

    Creator:
    Angelos, Gregory S.
    Abstract:
    CIGS and CdTe based commercial thin-film solar cells (TFSCs) require an absorber thickness greater than 2 µm and 4 µm, respectively, to adequately absorb the solar spectrum. To efficiently extract photoexcited electrons, these TFSCs require relatively defect-free absorbers with high-minority carrier mobility (> 100 cm2V−1s−1) and long lifetime (> 10...
    Resource Type:
    Dissertation
    Full Text:
    characterization . . . . . . . . . . . . . . . . . . . . . . . . 51 3.2.1 X-ray diffraction

  • Thin Films via Chemical Solution Deposition Synthesis from the (Bi₀.₅Na₀.₅)TiO₃-(Bi₀.₅K₀.₅)TiO₃-Bi(Mg₀.₅Ti₀.₅)O₃ Ternary System

    Creator:
    Mendez, Jose Eduardo
    Abstract:
    The ternary system (Bi₀.₅Na₀.₅)TiO₃-(Bi₀.₅K₀.₅)TiO₃-Bi(Mg₀.₅Ti₀.₅)O₃ (BNT-BKT-BMgT) was explored along the [75-(x 2) ]Bi₀.₅Na₀.₅TiO₃ - [25-(x 2)]Bi₀.₅K₀.₅TiO₃ - [x]Bi(Mg₀.₅Ti₀.₅)O₃ composition line. Thin films were fabricated using chelated mixing route solutions spin cast onto platinized silicon substrates. Processing parameters such as: excess cation molar%, solution molality, and crystallization temperatures, for composition where x=0,...
    Resource Type:
    Masters Thesis
    Full Text:
    -(Bi0.5K0.5)TiO3-Bi(Mg0.5Ti0.5)O3 (BNT-BKT-BMgT) was explored along the [75−x2 ]Bi0.5Na0.5TiO3 - [25− x 2

  • Influences of Replacing Cr with Mo in Fe25Co25Ni25Cr25-XMoX High Entropy Alloy Series on the Microstructure and Mechanical Properties

    Creator:
    Xu, Yifan
    Abstract:
    Fe25Co25Ni25Cr25-XMoX High Entropy Alloys were fabricated in mini arc-melter and then cast into 4mm diameter cylinders by injection casting technique and 1cm diameter cylinders by water quenching technique. Heat transfer modeling during solidification of FeCoNiCr HEA was simulated. Combining X-Ray Diffraction, Optical Microscopy, Scanning Electron Microscope, Energy Dispersive X-ray analysis,...
    Resource Type:
    Masters Thesis
    Full Text:
    . Combining X-Ray Diffraction, Optical Microscopy, Scanning Electron Microscope, Energy Dispersive X-ray

  • Experimental Characterization of a Supercritical Carbon Dioxide Microchannel Solar Thermal Receiver

    Creator:
    L'Estrange, Thomas
    Abstract:
    Characterization of a microchannel solar thermal receiver for supercritical carbon dioxide (sCO₂) is presented. The receiver design is based on conjugate computational fluid dynamics and heat transfer simulations as well as thermo-mechanical stress analysis. Two lab scale receivers with a 2x2 cm² absorber area are fabricated and experimentally characterized -...
    Resource Type:
    Masters Thesis
    Full Text:
    200 bar. Following the successful test of the 2 x 2 cm lab-scale receiver, a larger 8x8 cm2

  • Growth, Characterization, and Application of Antimony Sulfide Thin Films via a Novel Microreactor Assisted Nanomaterial Deposition for Solid State Batteries

    Creator:
    Chun, Bryan H.
    Abstract:
    The continuous development of higher performing battery materials has emerged in parallel with the development of new manufacturing processes. Nanomaterials are one solution to addressing the cycling and performance challenges that limit existing battery cells. However, many of the methods used today for nanomaterial synthesis are high temperature batch methods...
    Resource Type:
    Masters Thesis
    Full Text:
    , stylus profilometry, x-ray diffraction (XRD), and energy-dispersive x-ray spectroscopy (EDX

  • Chemical Solution Deposition and in-situ Structural Characterization of Pb-free, Bi-based, Piezoelectric Thin Films

    Creator:
    Fox, Austin J.
    Abstract:
    This work explores the electric field induced strain mechanisms in environmentally benign Bi0.5Na0.5TiO3 (BNT) based piezoelectric thin films. Although BNT-based materials show promise as replacements for toxic Pb-based piezoelectrics, the displacement mechanisms are not consistent between thin films and bulk materials, and the differences have yet to be well understood....
    Resource Type:
    Dissertation
    Full Text:
    , in-situ structural characterization (2-dimensional X-Ray Diffraction (XRD2)) under applied field

  • Fracture toughness of void-site-filled skutterudites

    Creator:
    Eilertsen, James S.
    Abstract:
    Thermoelectric materials are playing an increasingly significant role in the global effort to develop sustainable energy technologies. Consequently, the demand for materials with greater thermoelectric efficiency has stimulated the development of state-of-the-art interstitially doped skutterudite-based materials. However, since intermetallics are often embrittled by interstitial substitution, optimal skutterudite-based device design, manufacture,...
    Resource Type:
    Masters Thesis
    Full Text:
    were analyzed by X-ray diffraction, and then sintered by hot uniaxial pressing into dense pellets

  • Stability and Liftoff of Non-premixed Large Hydrocarbon Flames in MILD Conditions

    Creator:
    Walters, Eric M.
    Abstract:
    The Moderate or Intense Low-oxygen Dilution (MILD) combustion regime has received interest from the industrial furnace and gas turbine engine industries due to attractive properties of reduced NO[subscript x] emissions and high thermal efficiency. MILD combustion is characterized by low oxygen concentrations (i.e. 3%-9% by volume) and high reactant temperatures....
    Resource Type:
    Masters Thesis
    Full Text:
    ms and images are captured at 1.5Hz with a resolution of 700 x 280 pixels. The spatial resolution is

  • Numerical and Experimental Investigation of Wing Flutter Suppression via Distributed Propulsion

    Creator:
    Anderson, Cole J.
    Abstract:
    In a seminal paper published in 1982, scientist have warned that humanity was pushing earth’s ecosystems beyond their capacities to support the web of life. One response to the concern was outlined by NASA with its vision for advanced fixed wing transport aircraft to be environmentally compatible and have revolutionary...
    Resource Type:
    Masters Thesis
    Full Text:
    Page 1. Definition of pitch and plunge degrees-of-freedom8…………………….……2 2. The X-56A MUTT aircraft14

  • Modeling, control, and estimation of flexible, aerodynamic structures

    Creator:
    Ray, Cody W.
    Abstract:
    Engineers have long been inspired by nature's flyers. Such animals navigate complex environments gracefully and efficiently by using a variety of evolutionary adaptations for high-performance flight. Biologists have discovered a variety of sensory adaptations that provide flow state feedback and allow flying animals to feel their way through flight. A...
    Resource Type:
    Dissertation
    Full Text:
    % noise . . . . . . . . . . . 133 6.20 Exact load one: P z = 200 sin(⇡x) sin(⇡y