Sökning: "surface passivation"

Visar resultat 1 - 5 av 27 uppsatser innehållade orden surface passivation.

  1. 1. Investigation of high temperature stability of additive manufactured austenitic stainless steels for space applications

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Materialvetenskap

    Författare :Belén Alonso Rancurel; [2023]
    Nyckelord :austenitic stainless steel; additive manufacturing; high temperature corrosion; high temperature stability;

    Sammanfattning : Additive manufacturing (AM) techniques are being studied for their application in the aerospace industry. Numerous benefits come from the already in shape final piece, which needs reduced amount of prime material for its production and can have its shape numerically optimized for weight reduction. LÄS MER

  3. 2. Graphene Quantum Dots as Fluorescent and Passivation Agents for Multimodal Bioimaging

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Nüzhet Inci Kilic; [2021]
    Nyckelord :graphene quantum dots; hybrid nanoparticles; x-ray fluorescence contrast agents; multimodal bioimaging; grafen-kvantprickar; hybrida nanopartiklarna; multimodal bioavbildning; röntgenfluorescens kontrastmedel;

    Sammanfattning : Zero-dimensional graphene (carbon) quantum dots have been drawing attention in bio-related applications since their discovery, especially for their optical properties, chemical stability, and easily modifiable surface.  This thesis focuses on the green synthesis of nitrogen-doped graphene quantum dots (GQDs) for dual-mode bioimaging with X-ray fluorescence (XRF) and optical fluorescence. LÄS MER

  4. 3. Surface Finishing and Corrosion Resistance of 3D Printed Maraging Steel

    Master-uppsats,

    Författare :Yinan Shao; [2020]
    Nyckelord :Surface finishing; corrosion resistance; selective laser melting; microstructure; maraging steel;

    Sammanfattning : 3D printing, also known as additive manufacturing (AM), has got rapidly developed since 1987. Compared with conventional manufacturing methods, 3D printing provides some advantages such as increasing material utilization and less waste of material. LÄS MER

  5. 4. Properties of III-V/Si heterojunction fabricated by HVPE

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Prakhar Bhargava; [2020]
    Nyckelord :;

    Sammanfattning : Silicon is a promising material and is used for a wide range of applications in the electronics industry because of the high quality surface passivation given by the native oxide layer SiO2e. However, Si is not an ideal candidate for optoelectronic applications due to its indirect bandgap of 1. LÄS MER

  7. 5. Influence of microstructure on surface characteristics in cold-deformed stainless steel tubes

    Master-uppsats, Lunds universitet/Materialteknik

    Författare :Fredrik Ottenklev; [2019]
    Nyckelord :Cold deformation; surface roughness; strain; microstructure; austenitic stainless steel; grain rotation; Technology and Engineering;

    Sammanfattning : Cold deformation of metals is known to induce roughness on their free surface. In some of the processing equipment of Tetra Pak processing systems, tubes of austenitic stainless steel 316L are used. During the production of this processing equipment, such tubes are occasionally cold-deformed. LÄS MER