Sökning: "pure fe"

Visar resultat 11 - 15 av 81 avhandlingar innehållade orden pure fe.

  1. 11. Thermodynamic and kinetic properties of Fe-Cr and TiC-ZrC alloys from Density Functional Theory

    Författare :Vsevolod Razumovskiy; Pavel Korzhavyi; Andrei Ruban; Malin Selleby; Sergei Dudarev; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ab initio; first principles; point defects; vacancy clusters; alloys; steels; iron; carbides; diffusion; phase diagram; density functional theory; elastic constants; elastic properties; thermodynamic modelling;

    Sammanfattning : The complete and accurate thermodynamic and kinetic description of any systemis crucialfor understanding and predicting its properties. A particular interest is in systemsthat are used for some practical applications and have to be constantly improved usingmodification of their composition and structure. LÄS MER

  3. 12. Solution-Chemical Synthesis of Cobalt and Iron:Zinc Oxide Nanocomposite Films

    Författare :Ulrika Lagerqvist; Annika Pohl; Peter Svedlindh; Mikael Ottosson; Theodor Schneller; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fe:Zn oxide; Co-CoO; Solution-chemical synthesis; Heat treatment parameters; Nanocomposite; Film; Multilayer; Phase ratio; Phase distribution; Exchange bias; Magnetism; Photocatalysis; Chemistry with specialization in Inorganic Chemistry; Kemi med inriktning mot oorganisk kemi;

    Sammanfattning : The potentially most important challenges today are related to energy and the environment. New materials and methods are needed in order to, in a sustainable way, convert and store energy, reduce pollution, and clean the air and water from contaminations. LÄS MER

  4. 13. High Performance Manufacturing of Advanced Thin Plates ─ Forming of Titanium and Stainless Steel Materials

    Författare :Per Gabrielson; Industriell Produktion; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High performance manufacturing; test tools; sheet-metal forming; stainless steel; commercially pure titanium; process optimization; forming simulation; finite element analyses; acoustic emission; production performance analysis; cost models; manufacturing costs; sustainable production;

    Sammanfattning : The manufacturing industry represents a highly important sector of the Swedish economy. The increasing demands placed on the quality and performance of products that are manufactured places increasing demands on the manufacturing processes involved. LÄS MER

  5. 14. On Peritectic Reactions and Transformations and Hot Forming of Cast Structures

    Författare :Hani Nassar; Hasse Fredriksson; Rian Dippenaar; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; peritectic reactions; massive transformations; thermal analysis; Fe-base alloys; steels; growth irregularities; hot forming; compression testing; flow stress; grain size.; Metallurgical manufacturing engineering; Metallurgisk produktionsteknik; Metallurgical process engineering; Metallurgisk processteknik;

    Sammanfattning : This thesis deals with peritectic reactions and transformations that occur during the solidification of many alloys. Peritectics are believed to be a major cause of crack-formation in many steels, thus, good knowledge of the mechanisms by which these phenomena occur is essential for preventing such defects. LÄS MER

  7. 15. Defects in Austenitic Steels and Hard Metals - A DFT-based Study

    Författare :Ruiwen Xie; Levente Vitos; Ilja Turek; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; defects; austenitic steels; cemented carbides; ab-initio; Teknisk materialvetenskap; Materials Science and Engineering;

    Sammanfattning : Materials are never 100% pure due to the limitation of purification method or manufacturing process. Nor are they perfect, especially under deformation. The present work aims to explore different roles played by the defects in austenitic steels and hard metals. LÄS MER