Sökning: "cathode layer"

Visar resultat 11 - 15 av 61 avhandlingar innehållade orden cathode layer.

  1. 11. Surface characterization of the chromium hydroxide and basic calcic deposition layers formed on the steel cathode in the chlorate production process

    Författare :Annika Ahlberg Tidblad; KTH; []
    Nyckelord :;

    Sammanfattning : During technical service, the surface of the steel cathodein the chlorate production process changes with respect tochemical composition and morphology. Deposition of insolublespecies from the electrolyte and corrosion products from thebase metal accumulate and form surface layers that influencethe cathode activity with regards to hydrogen evolution, theprimary reaction, as well as to various parasitic reactions. LÄS MER

  3. 12. Semiconductor-ionic Materials for Low Temperature Solid Oxide Fuel Cells

    Författare :Muhammad Afzal; Andrew R. Martin; Peter Lund; Hab. Armelle Ringuede; KTH; []
    Nyckelord :Semiconductor-ionic materials; electrolyte-layer free fuel cell; low temperature solid oxide fuel cell; fuel to electricity conversion; Schottky junction; theoretical and experimental curves; Halvledar-joniska material; elektrolytskikt-fri bränslecell; lågtemperatur fastoxidbränslecell; bränsle till elomvandling; Schottky junction; teoretiska och experimentella kurvor; Energy Technology; Energiteknik;

    Sammanfattning : Solid oxide fuel cell (SOFC) is considered as an attractive candidate for energy conversion within the fuel cell (FC) family due to several advantages including environment friendly, use of non-noble materials and fuel flexibility. However, due to high working temperatures, conventional SOFC faces many challenges relating to high operational and capital costs besides the limited selection of the FC materials and their compatibility issues. LÄS MER

  4. 13. Corrosion of current cullector materials in the molten carbonate fuel cell

    Författare :Baohua Zhu; KTH; []
    Nyckelord :molten carbonate fuel cell MCHC ; corrosion; current collecotr; contact corrosion reistance;

    Sammanfattning : The corrosion of current collector materials in MoltenCarbonate Fuel Cells (MCFC) is investigated. The essential aimsof this investigation were to study the corrosion behaviour ofdifferent materials, in varying cathode and anode MCFCenvironments, and to study the contact corrosion resistancesbetween the MCFC current collector and electrodes. LÄS MER

  5. 14. Microstructure evolution of Ti-based and Cr cathodes during arc discharging and its impact on coating growth

    Författare :Jianqiang Zhu; Magnus Odén; Johanna Rosén; Lars Hultman; Flavio Soldera; Linköpings universitet; []
    Nyckelord :;

    Sammanfattning : This thesis explores the microstructure evolution of cathodes with various material compositions and grain sizes during cathodic arc evaporation processes as well as the impact on the arc movement, and the microstructure and properties of the deposited nitride coatings. The studied cathode material systems include conventionally metal forged Ti and Ti -Si cathodes, novel Ti3SiC2 MAX-phase cathodes, and dedicatedly designed powder-metallurgical Ti-Si and Cr cathodes with different grain size. LÄS MER

  7. 15. Cathodic arc deposition process

    Författare :Muhammad Bilal Syed; Magnus Odén; Jianqiang Zhu; Lars Hultman; Zdeněk Hubička; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This thesis aims to expand the knowledge of fundamental mechanisms that govern the cathodic arc process. The first part of this thesis explores and explains the correlations between a rather unexplored process parameter (i.e. cathode microstructure) and the microstructure of the coatings. LÄS MER