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Filtering by: Creator Goffard, Joseph William Remove constraint Creator: Goffard, Joseph William Committee Member Warnes, William Remove constraint Committee Member: Warnes, William

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  • Effect of ambient environment on the fracture and fatigue properties of Zr-based bulk metallic glasses

    Creator:
    Philo, Sarah L.
    Abstract:
    The effect of ambient environment on the fatigue behavior of two Zr-Ti-Cu-Ni-Be bulk metallic glasses (BMGs) is examined in the present study. The first metallic glass, Zr₄₄Ti₁₁Ni₁₀Cu₁₀Be₂₅, was tested to establish the presence of an environmental effect in the fatigue growth curve measured in ambient air. Fatigue growth curves produced...
    Resource Type:
    Masters Thesis
    Full Text:
    samples, Dr. William Warnes for unwittingly donating his vacuum pump, Christopher Shelton and Dr

  • Heat transport at interface in the metal-organic-frameworks MOF-5

    Creator:
    Huang, Wenxi
    Abstract:
    The metal-organic–framework MOF-5 is used as an adsorbent in advanced systems for vehicular hydrogen storage that are currently under development. Presently, these systems are limited by poor thermal conductivity of the adsorption bed, and thus our research addresses how the interfaces between grains of MOF-5 can be engineered to improve...
    Resource Type:
    Masters Thesis

  • Developing Design Model for Cellulose Nanocomposites

    Creator:
    Shir Mohammadi, Meisam
    Abstract:
    Today nano scale materials are being used for wide range of applications. One promising topic in nano scale materials is using them for reinforcement of different polymeric materials to reach desirable stiffness properties. The stiffness of these materials is mostly found experimentally because the nanocomposite community lacks a decent analytical...
    Resource Type:
    Dissertation

  • Synthesis and characterization of Pb(Zr,Ti)O₃ thin films for microelectromechanical systems

    Creator:
    Brookshire, Kirsten L.
    Abstract:
    Pb(Zr,Ti)O₃ (PZT) is a very attractive material for use in piezoelectric-based microelectromechanical systems (MEMS) due to its high piezoelectric coefficients and ability for large displacements with relatively low applied fields (as compared to electrostatic-based MEMS). The piezoelectric effect is strongly anisotropic, thus it is very desirable to control the crystallographic...
    Resource Type:
    Masters Thesis
    Full Text:
    not observed experimentally until the mid 1800’s by Joseph Valasek.18 Ferroelectricity is defined

  • Determination of magnetoelastic parameters in magnetic thin films from FMR spectra

    Creator:
    Masood, Khalid I.
    Abstract:
    The ferromagnetic resonance (FMR) phenomenon serves as a sensitive probe of the effective internal fields in a magnetic material. FMR spectroscopy has consequently become a well-established technique, extensively employed in assessing material properties such as magnetic anisotropy, Landé g-factor, damping parameter, and the magnetoelastic constants of magnetic materials. Determining these...
    Resource Type:
    Dissertation

  • Negative thermal expansion in AOMO₄ compounds

    Creator:
    Amos, Tammy G.
    Resource Type:
    Dissertation
    Full Text:
    . John Loeser, and Dr. William Warnes. I want to acknowledge my co-workers in the Sleight group: Rebecca

  • Design, construction, and characterization of a neutron depth profiling facility at the Oregon State University TRIGA® reactor with an advanced digital spectroscopy system

    Creator:
    Robinson, Joshua A.
    Abstract:
    In this work, Neutron Depth Profiling (NDP) analysis capability has been added to the Oregon State University TRIGA® Reactor Prompt Gamma Neutron Activation Analysis Facility (PGNAA). This system has been implemented with an advanced digital spectroscopy system and is capable of rise time pulse shape analysis as well as coincidence...
    Resource Type:
    Dissertation
    Full Text:
    , Fama, who has cared for our four small children (Joseph, Jonathan, Daniel, and Caleb) and encouraged

  • Catching Ions in Superfluid Helium Droplets

    Creator:
    Chen, Lei
    Abstract:
    In this dissertation, I describe the experimental investigation of catching ions in superfluid helium droplets. The ultimate goal of our project is to build a coherent electron diffraction apparatus for atomic structure determination from oriented single macromolecules. This involves generating protein ions from electrospray ionization (ESI) and doping them in...
    Resource Type:
    Dissertation
    Full Text:
    and Dr. William Warnes for their insightful comments and advice. Finally, I would like to

  • Cation Substitution Effects in Complex Transition Metal Oxides

    Creator:
    Duell, Brett A.
    Abstract:
    Understanding structural evolution in solids as composition changes is essential to materials properties prediction. Such structure-properties relationships are the theme of solid state chemistry. Materials scientists and chemists have utilized an abundance of simple crystal structures to enhance understanding of chemical and structural origins of properties in materials for decades....
    Resource Type:
    Dissertation
    Full Text:
    committee members, Drs. Michael Lerner, David Ji, Brady Gibbons, and William Warnes for the time they have

  • Characterization of load transfer in wood-based composites

    Creator:
    Schwarzkopf, Matthew John
    Abstract:
    The mechanical performance of composite materials is determined by the mechanical properties of their individual components and the effective load transfer between these components. Binders are commonly used to bond composite components together and to provide effective load transfer between them. In wood-based composites the binder-component load transfer occurs at...
    Resource Type:
    Dissertation
    Full Text:
    Rochefort Dr. William Warnes Dr. Lisa Ganio Milo Clauson Dr. John Simonsen Dr. Frank Stöckel