Sökning: "FIB"

Visar resultat 11 - 15 av 80 avhandlingar innehållade ordet FIB.

  1. 11. Microstructural investigation on high temperature oxidation of Cr2O3-forming and Al2O3-forming steels

    Författare :Fang Liu; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high temperature oxidation; FeCrAl alloys; TEM; water vapour; SEM; FIB; stainless steels; EDX;

    Sammanfattning : .... LÄS MER

  3. 12. Microstructure Investigation of the Oxidation Process in Zircaloy-2 - The Effect of Intermetallic Particle Size

    Författare :Pia Tejland; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Zircaloy-2; STEM; HAADF; ADF; FIB; SEM; EDX; APT;

    Sammanfattning : Zirconium alloys are widely used in nuclear reactors as fuel cladding tubes because of their low thermal neutron capture cross-section, good corrosion properties and satisfactory mechanical properties. With an improved corrosion resistance the alloys could be used for much longer times in the reactors, increasing fuel burn-up and decreasing the amount of radioactive waste. LÄS MER

  4. 13. Microscopic Characterisation of Solar Cells : An Electron Microscopy Study of Cu(In,Ga)Se2 and Cu2ZnSn(S,Se)4 Solar Cells

    Författare :Jörn Timo Wätjen; Marika Edoff; Angus Rockett; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEM; SEM; FIB; solar cell; CIGS; CZTS; Alternative buffer layers; Gallium gradients; microscopic electrical characterisation; Secondary Phases; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

    Sammanfattning : The sun provides us with a surplus of energy convertible to electricity using solar cells. This thesis focuses on solar cells based on chalcopyrite (CIGSe) as well as kesterite (CZTS(e)) absorber layers. These materials yield record efficiencies of 20.4 % and 11. LÄS MER

  5. 14. Initial Oxidation of β-NiAl(Pt) Coatings and Model Alloys

    Författare :Henrik Svensson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FIB-SEM; SEM; #946; TEM; Diffusion Coatings; Metal-Oxide Interface; High Temperature Oxidation; Cavities; Platinum; -NiAl;

    Sammanfattning : The aim of this work was to investigate the oxidation properties of NiAl coatings and model materials during high temperature oxidation. One of the important issues was to elucidate the beneficial role of Pt additions. A better understanding of the involved processes provides a key for the further improvement of the coatings performance. LÄS MER

  7. 15. Quantitative Electron Microscopy Studies of Metal Nanoparticle Catalysts: Nanostructure, Support Interaction and Ageing Effects

    Författare :Torben Nilsson Pingel; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; CO oxidation; strain; ageing; specimen preparation; scanning electron microscopy SEM ; FIB SEM; supported nanoparticle catalyst; transmission electron microscopy TEM ; particle size distribution PSD ; platinum;

    Sammanfattning : Heterogeneous catalysis plays a major role in modern society, for example in chemical production, sustainable energy production and emission control technologies. Metal nanoparticles (NPs) supported on oxide materials are frequent catalytic systems in this field. LÄS MER