Sökning: "Nanocrystalline"

Visar resultat 1 - 5 av 9 uppsatser innehållade ordet Nanocrystalline.

  1. 1. Corrosion Resistant Multi-Component Coatings for Hydrogen Fuel Cells

    Master-uppsats, Linköpings universitet/Tunnfilmsfysik

    Författare :Jakob Steneteg; [2021]
    Nyckelord :Coatings; Hydrogen Fuel Cells; Multi-Component; High Entropy Alloys; Corrosion Resistance;

    Sammanfattning : Multi-component coatings and high entropy alloys have in recent years attracted great interest for research, since they have shown to exhibit properties greater than the com- ponents of their parts. Today’s climate challenges requires transitioning from fossil fuels to renewable energy sources which demands use of new technology and new innovations. LÄS MER

  3. 2. Ferroelectricity in nanocrystalline Hf0.5Zr0.5O2 thin films

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Lun Sang; [2018]
    Nyckelord :ferroelectricity; Hf0.5Zr0.5O2; GIXRD; XRR; Technology and Engineering; Physics and Astronomy;

    Sammanfattning : Hafnium dioxide (HfO_2) based thin films doped with various dopants (Si, Ge, Al, Gd, Sr, Zr) have been found to exhibit ferroelectricity. These dopants were found to stabilize the III orthorhombic phase in the hafnium oxide based thin films. LÄS MER

  4. 3. Evaluation of graphene as a transparent electrode in GaN-based LEDs by PECVD synthesis of graphene directly on GaN

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Linus Johansson; [2016]
    Nyckelord :PECVD; graphene; transparent electrode; gallium nitride; LED;

    Sammanfattning : A transparent conductive electrode (TCE) is an important component in many of our modern optoelectronic devices like photovoltaics, light emitting diodes and touch screens. These devices require good current injection and spreading as well as a high transparency. LÄS MER

  5. 4. Optimizing Transmission Kikuchi Diffraction for Analysing Grain Size and Orientation of Nanocrystalline Coatings

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Tillämpad materialvetenskap

    Författare :Axel Tryblom; [2015]
    Nyckelord :TKD; t-EBSD; Kikuchi diffraction; coating; nanocrystalline; sample preparation; in situ lift-out; DualBeam; precision mechanical polishing; SEM;

    Sammanfattning : In order to increase efficiency and lifetime of cutting tools it is typical to apply thin coatings by physical or chemical vapour deposition. Applying coatings on cutting tools has shown an increase in both efficiency and lifetime and are of large interest in further development. LÄS MER

  7. 5. Thermal Stability of cubic and nanocrystalline arcevaporated TiCrAlN coatings

    Master-uppsats, Linköpings universitet/Nanostrukturerade material; Linköpings universitet/Tekniska högskolan

    Författare :Hassan Saleem; [2014]
    Nyckelord :;

    Sammanfattning : (TixCryAlz)N coatings were deposited on WC-Co substrate using cathodic arc evaporation technique to investigate phase transformation, thermal stability, and high temperature mechanical properties. Two compositions Ti0.34Cr0.33Al0. LÄS MER