Search for dissertations about: "Hans Högberg"

Showing result 11 - 15 of 29 swedish dissertations containing the words Hans Högberg.

  2. 11. Deracemization of Functionalized Alcohols via Combined Ruthenium and Enzyme Catalysis

    Author : Ann-Britt L. Fransson; Jan-Erling Bäckvall; Hans-Erik Högberg; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Organic chemistry; Organisk kemi;

    Abstract : The major part of this thesis describes the synthesis of enantiopure alcohols and diols by combining ruthenium-catalyzed racemization or epimerization and lipase-catalyzed asymmetric transformations. A minor part of this thesis is focused on ruthenium-catalyzed redox reactions for transfer hydrogenation of 1,3-cycloalkanediketones. READ MORE

  4. 12. Thick and Thin Ti2AlC Coatings

    Author : Jenny Frodelius; Lars Hultman; Per Eklund; Hans Högberg; Lars Nyborg; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : This Thesis explores the deposition techniques of magnetron sputtering and high velocity oxy-fuel (HVOF) spraying for Ti2AlC as a promising high-temperature material. Magnetron sputtering aims at producing thin (≤1 μm) Ti2AlC films of high crystal quality for use as a model system in understanding the material’s basic properties. READ MORE

  5. 13. Silicon Nitride Based Coatings Grown by Reactive Magnetron Sputtering

    Author : Tuomas Hänninen; Hans Högberg; Susann Schmidt; Lars Hultman; Arutiun P. Ehiasarian; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : Silicon nitride and silicon nitride-based ceramics have several favorable material properties, such as high hardness and good wear resistance, which makes them important materials for the coating industry. This thesis focuses the synthesis of silicon nitride, silicon oxynitride, and silicon carbonitride thin films by reactive magnetron sputtering. READ MORE

  6. 14. Silicon Oxynitride Thin Films Grown by Reactive HiPIMS

    Author : Tuomas Hänninen; Hans Högberg; Susann Schmidt; Lars Hultman; Jón Tómas Guðmundsson; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Amorphous silicon oxynitride (SiOxNy) thin films were grown by reactive high power impulse magnetron sputtering from a pure silicon target in Ar/N2O plasmas. The elemental composition of the films was shown to depend on the target surface conditions during the film deposition, as well as on the reactive gas flow rate. READ MORE

  7. 15. TiC-based nanocomposite coatings as electrical contacts

    Author : Jonas Lauridsen; Lars Hultman; Per Eklund; Hans Högberg; Michael Stüber; Linköpings universitet; []
    Keywords : ;

    Abstract : This Thesis concerns the advanced surface engineering of novel TiC-based nanocomposite and AgI electrical contact materials. The objective is to make industrially applicable coatings that are electrically conductive and wear-resistant, and have a low coefficient of friction. READ MORE