Sökning: "materialvetenskap"

Visar resultat 21 - 25 av 931 avhandlingar innehållade ordet materialvetenskap.

  1. 21. On the shrinkage of metals and its effect in solidification processing

    Författare :Anders Lagerstedt; Hasse Fredriksson; Alec Mitchell Mitchell; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; material science; mechanical engineering; metallurgy; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : The shrinkage during solidification of aluminium and iron based alloys has been studied experimentally and theoretically. The determined shrinkage behaviour has been used in theoretical evaluation of shrinkage related phenomena during solidification. Air gap formation was experimentally studied in cylindrical moulds. LÄS MER

  3. 22. Theoretical modeling of molar volume and thermal expansion

    Författare :Xiao-Gang Lu; Bo Sunsman; Michel Jacobs; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; first-principles calculations; ab initio; Calphad; Debye-Grüneisen model; thermodynamic properties; elastic modulus; volume; thermal expansivity; pressure; Thermo-Calc; VASP; element; carbide; nitride; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Combination of the Calphad method and theoretical calculations provides new possibilities for the study of materials science. This work is a part of the efforts within the CCT project (Centre of Computational Thermodynamics) to combine these methods to facilitate modeling and to extend the thermodynamic databases with critically assessed volume data. LÄS MER

  4. 23. Thermodynamic modelling and assessment of some alumino-silicate systems

    Författare :Huahai Mao; Bo Sundman; Gunnar Eriksson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermodynamic modelling; thermodynamic assessment; alumino-silicate system; slag; oxide system; CALPHAD; phase diagram; phase equilibrium; Thermo-Calc; compound energy formalism; ionic two sub-lattice liquid model; AlO2-1 species; Al2O3; CaO; MgO; SiO2; Y2O3; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Alumino-silicate systems are of great interest for materials scientists and geochemists. Thermodynamic knowledge of these systems is useful in steel and ceramic industries, and for understanding geochemical processes. A popular and efficient approach used to obtain a self-consistent thermodynamic dataset is called CALPHAD. LÄS MER

  5. 24. Influence of defects and geometry in welded joints

    Författare :Peter Nerman; Rolf Sandström; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap;

    Sammanfattning : .... LÄS MER

  7. 25. Design, synthesis and characterisation of multilayered PVD coatings

    Författare :Maria Nordin; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

    Sammanfattning : Physically vapour deposited multilayered coatings were the target of this thesis.Several different wear resistant nitride coatings (TiN/CrN, TiN/MoN, TiN/NbN andTiN/TaN) have been evaluated. LÄS MER