Sökning: "nanocrystalline materials"

Hittade 4 uppsatser innehållade orden nanocrystalline materials.

  1. 1. 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

  3. 2. 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

  4. 3. Magnetism of Nanocrystallized Amorphous Fe75B10Si15

    Master-uppsats, KTH/Materialvetenskap

    Författare :Arnab Chakraborty; [2012]
    Nyckelord :amorphous metals; nanocrystalline materials; magnetism; soft magnetic material;

    Sammanfattning : Amorphous ribbons of alloy composition Fe75B10Si15 are cast by melt spinning and annealed to partially nanocrystalline states. The magnetic properties are investigated by VSM and MTGA. Structure is examined using XRD and SEM. LÄS MER

  5. 4. Investigation of Structural and Optical Properties of Nanocrystalline ZnO

    Uppsats för yrkesexamina på grundnivå, Institutionen för fysik, kemi och biologi

    Författare :Sajjad Hussain; [2008]
    Nyckelord :Investigation; Structural; Optical; Properties; Nanocrystalline; ZnO;

    Sammanfattning : The structural quality of material (concentration and nature of defects) and optical properties (intensity and spectral emission range) of semiconductor materials are usually closely correlated. The idea of this work was to carry out a basic characterization of the structural (by X-ray diffraction technique and scanning electron microscopy) and optical (by micro photoluminescence measurements) properties of nanocrystalline ZnO samples and find a correlation. LÄS MER