Sökning: "Hans Högberg"

Visar resultat 26 - 30 av 30 avhandlingar innehållade orden Hans Högberg.

  1. 26. Physical Vapor Deposition of Yttria-Stabilized Zirconia and Gadolinia-Doped Ceria Thin Films for Fuel Cell Applications

    Författare :Steffen Sønderby; Per Eklund; Hans Högberg; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : In this thesis, reactive sputter deposition of yttria-stabilized zirconia (YSZ) and cerium gadolinium oxide (CGO) thin films for solid oxide fuel cell (SOFC) applications have been studied. All films have been deposited under industrial conditions.YSZ films were deposited on silicon wafers as well as commercial NiO-YSZ fuel cell anodes. LÄS MER

  3. 27. Growth and Characterization of ZrB2 Thin Films

    Författare :Lina Tengdelius; Hans Högberg; Urban Forsberg; Denis Music; Linköpings universitet; []
    Nyckelord :Zirconium diboride ZrB2 ; Thin film; Magnetron sputtering; Epitaxi; Silicon carbide SiC ;

    Sammanfattning : In this thesis, growth of ZrB2 thin films by direct current magnetron sputtering is investigatedusing a high vacuum industrial scale deposition system and an ultra-high vacuum laboratory scalesystem. The films were grown from ZrB2 compound targets at temperatures ranging from ambient (without external heating) to 900 °C and with substrate biases from -20 to -120 V. LÄS MER

  4. 28. ZrB2 Thin Films : Growth and Characterization

    Författare :Lina Tengdelius; Hans Högberg; Urban Forsberg; Gregory S. Girolami; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Zirconium diboride, ZrB2, is a ceramic material with bulk properties such as high melting point (3245 °C), high hardness (23 GPa), and low resistivity (~8 μΩcm). Thin film growth of ZrB2 using physical vapor deposition has suffered from problems with films deviating from stoichiometry and with high levels of contaminants, especially high oxygen content. LÄS MER

  5. 29. Nanocrystalline Alumina-Zirconia Thin Films Grown by Magnetron Sputtering

    Författare :David Huy Trinh; Hans Högberg; Marianne Collin; Lars Hultman; Ingrid Reineck; Mats Halvarsson; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : Alumina-zirconia thin films have been deposited using dual magnetron sputtering. Film growth was performed at relatively low-to-medium temperatures, ranging from ~300°C to 810 °C. Different substrates were applied, including silicon (100), and industrially relevant materials, such as WC-Co hardmetal. LÄS MER

  7. 30. Synthesis and Characterisation of Magnetron Sputtered Alumina-Zirconia Thin Films

    Författare :David Huy Trinh; Hans Högberg; Anders Hårsta; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Alumina; Zirconia; NaKeywords: Alumina; Zirconia; Nanocomposite; Sputtering; Thin-Film; PVD; TEM; EELS; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Alumina-Zirconia thin films were grown on a range of substrates using dual magnetron sputtering. Film growth was achieved at a relatively low temperature of 450 °C and at higher temperatures up to 810 °C. The films were grown on well-defined surfaces such as silicon (100) but also on industrially relevant substrates such as hardmetal (WC-Co). LÄS MER