Sökning: "low energy electron diffraction"

Visar resultat 11 - 15 av 109 avhandlingar innehållade orden low energy electron diffraction.

  1. 11. Calculations of electronic structures with applications to transport properties and to low energy electron diffraction

    Författare :Jesper Neve; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The content of this thesis can be divided into two topics. The first topic is the calculation of the electronic structure of solids and clusters within the local density approximation. LÄS MER

  3. 12. Structure determination of clean and adsorbate-covered metal surfaces by low energy electron diffraction (LEED)

    Författare :J. Peter M. Westrin; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The present thesis includes contributions to the theory and methodology of Low Energy Electron Diffraction (LEED). These methods are applied to structure analyses of the clean and oxygen-covered (111) surface of aluminium; of the clean and cesium-covered (111) surface of copper; and of a sodium film evaporated onto a clean (111) surface of copper. LÄS MER

  4. 13. Stacking fault energy and deformation behaviour of austenitic stainless steels: a joint theoretical-experimental study

    Författare :Dávid Sándor Molnár; Levente Vitos; Göran Engberg; Guocai Chai; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; austenitic stainless steel; deformation properties; stacking fault energy; electron backscatter diffraction; ab initio; Teknisk materialvetenskap; Materials Science and Engineering; Steel Forming and Surface Engineering;

    Sammanfattning : Austenitiska rostfria stål är främst kända för sin exceptionella korrosionsbeständighet. De har en ytcentrerad kubisk (FCC) struktur som stabiliseras genom att nickel, mangan eller kväve tillsätts till Fe-Cr legeringen. Fe-Cr-Ni-systemet kan utökas ytterligare genom tillsats av andra element såsom Mo, Cu, Ti, C, etc. LÄS MER

  5. 14. Co-combustion of Biomass and Waste Fuels in a Fluidised Bed Boiler - Fuel Synergism

    Författare :Anna-Lena Elled; Högskolan i Borås; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; co-combustion; fluidised bed combustion; straw; municipal sewage sludge; deposit formation; ash composition; biomass; wood;

    Sammanfattning : The objective of this work was to study co-combustion of biomass and waste fuels in a circulating fluidised bed boiler and to detect synergy effects with respect to flue gas composition and ash formation during boiler operation. It was also the aim to perform supplementary thermodynamic equilibrium calculations in order to support the experimental results. LÄS MER

  7. 15. Structure-property investigation of ZnSb, ZnAs, and SiB3 : - binary semiconductors with electron poor framework structures

    Författare :Daniel Eklöf; Ulrich Häussermann; Oliver Orckler; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Thermoelectric; Waste heat harvesting; Semiconductor; X-ray powder diffraction; SEM; Electron poor framework; EPFS; Green house effect; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : In today’s society, where energy conservation and green energy are buzz words, new scientific discoveries in green energy harvesting is key. This work focuses on materials capable of recycling low value thermal energy. LÄS MER