Sökning: "Diffusion Coatings"

Visar resultat 1 - 5 av 93 avhandlingar innehållade orden Diffusion Coatings.

  1. 1. Designing multicomponent alloy coatings for corrosion protection

    Författare :León Zendejas Medina; Ulf Jansson; Leif Nyholm; Zoe Barber; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; corrosion; thin films; coatings; magnetron sputtering; high entropy alloy; percolation theory; mechanical tests; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Sammanfattning : This thesis explores the design of metallic coatings for corrosion protection. The subject of the study was the new class of materials multicomponent alloys (MCAs, also known as high entropy alloys). They consist of near-equal concentrations of many (four or more) metals and are often reported to form a single phase with a simple crystal structure. LÄS MER

  3. 2. Thermal Barrier Coatings : Durability Assessment and Life Prediction

    Författare :Robert Eriksson; Sten Johansson; Michael Schütze; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : Thermal barrier coating (TBC) systems are coating systems containing a metallic bond coat and a ceramic top coat. TBCs are used in gas turbines for thermal insulation and oxidation resistance. LÄS MER

  4. 3. Multilayer Structures for Biomaterial Applications : Biomacromolecule-based Coatings

    Författare :Tobias Halthur; Per M. Claesson; Bjørn Stokke; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; multilayer; layer-by-layer deposition; physical chemistry; surface chemistry; adsorption; ellipsometry; QCM-D; DPI; protein adsorption; polypeptides; biomaterials; biosurfaces; amelogenin; solid liquid interface; Surface and colloid chemistry; Yt- och kolloidkemi;

    Sammanfattning : The cellular response to a biomaterial, such as a dental implant, is mainly governed by the surface properties, and can thus be altered by the introduction of a surface coating. In this thesis the buildup of a biomacromolecule-based coating formed by layerby-layer (LbL) deposition of the charged polypeptides poly(L-lysine) (PLL) and poly(L-glutamic acid) (PGA) has been studied. LÄS MER

  5. 4. Reaching Kinetic Selectivities : In Pursuing Novel Ternary Oxide Coatings, and Beyond

    Författare :Sebastian Öhman; Mats Boman; Tobias Törndahl; Maarit Karppinen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; CVD; coatings; kinetics; crystallization; nucleation; diffusionless; Al2TiO5; oxides; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

    Sammanfattning : Kinetically driven synthesis pathways have the potential to allow new ways to develop materials and phases with much-improved properties. This particularly concerns metastable and multicomponent phases that require a selective kinetic targeting during the synthesis to circumvent the formation of thermodynamically stable products. LÄS MER

  7. 5. Surface coatings as xenon diffusion barriers on plastic scintillators : Improving Nuclear-Test-Ban Treaty verification

    Författare :Lisa Bläckberg; Mattias Klintenberg; Henrik Sjöstrand; Anders Ringbom; Stephan Pomp; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Plastic scintillator; Radioxenon; Diffusion barrier; Surface coating; Atomic Layer Deposition; Comprehensive Nuclear-Test-Ban Treaty; Fysik med inriktning mot tillämpad kärnfysik; Physics with specialization in Applied Nuclear Physics; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Sammanfattning : This thesis investigates the ability of transparent surface coatings to reduce xenon diffusion into plastic scintillators. The motivation for the work is improved radioxenon monitoring equipment, used with in the framework of the verification regime of the Comprehensive Nuclear-Test-Ban Treaty. LÄS MER