Search for dissertations about: "hard carbon"

Showing result 21 - 25 of 74 swedish dissertations containing the words hard carbon.

  2. 21. Synthesis of Carbon-based and Metal-Oxide Thin Films using High Power Impulse Magnetron Sputtering

    Author : Asim Aijaz; Ulf Helmersson; Kostas Sarakinos; Günter Bräuer; Linköpings universitet; []
    Keywords : ;

    Abstract : The work presented in this thesis deals with synthesis of carbon-based as well as metal-oxide thin films using highly ionized plasmas. The principal deposition method employed was high power impulse magnetron sputtering (HiPIMS). READ MORE

  4. 22. Fullerene-like CNx and CPx Thin Films; Synthesis, Modeling, and Applications

    Author : Andrej Furlan; Lars Hultman; Brian Holloway; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phosphorus-carbide CPx ; carbon nitride CNx ; thin films; resilient coatings; magnetron sputtering; theoretical modeling; Material physics with surface physics; Materialfysik med ytfysik;

    Abstract : This Thesis concerns the development of fullerene-like (FL) carbon nitride (CNx) thin films and the discovery of phosphorus-carbide (CPx) compounds. The work dedicated to CPx include first-principles theoretical simulations of the growth and properties of FL-CPx structures. READ MORE

  5. 23. The role of the hydrological cycle in forest ecosystems : flow path, nutrient cycling and water-carbon interaction

    Author : Yanzi Yan; MERGE: ModElling the Regional and Global Earth system; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; flow path; DOC concentration; groundwater; photosynthesis; Amazon rainforest; catchment geomorphology;

    Abstract : Forest ecosystems, covering over a third of land on the Earth, play a significant role in the global hydrological cycle, and influence soil erosion and climate change. However, the distribution, movements, quality of water, and hydrological processes in forested ecosystems are not well understood yet. READ MORE

  6. 24. Environmental, Resource and Health Assessments of Hard Materials and Material Substitution: The Cases of Cemented Carbide and Polycrystalline Diamond

    Author : Anna Furberg; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Life cycle assessment; polycrystalline diamond; disability-adjusted life years; material flow analysis; machining tools; cemented carbide;

    Abstract : The conventional hard material used in manufacturing industry, cemented carbide (WC-Co), mainly consists of the geochemically scarce elements tungsten and cobalt. This use of scarce resources could potentially be avoided by a material substitution to the more abundant and largely carbon-based material polycrystalline diamond (PCD). READ MORE

  7. 25. Three Dimensional Multiphysics Modeling of Reversible Solid Oxide Electrochemical Cells for Degradation Studies

    Author : Maria Navasa; Värmeöverföring; []
    Keywords : SOCs; SOECs; SOFCs; multiphysics; modeling; three dimensional; transport phenomena; electrochemical reactions; overpotentials; potentials; boundary conditions; validation; experimental data; degradation; carbon deposition; steam; hydrogen; carbon dioxide; carbon monoxide; carbon activity;

    Abstract : Solid oxide electrochemical cells (SOCs) are considered a highly promising technology for providing efficient, sustainable and economic conversion between chemical energy and electrical energy. SOCs can be operated as fuel cells, where electric power is obtained from fossil or non-fossil hydrocarbon fuels depending on the origin or as electrolysis cells, whereby using electrical energy from renewable sources like wind or solar, chemical energy can be stored as fuels. READ MORE