Search for dissertations about: "Refractory metals"

Showing result 1 - 5 of 18 swedish dissertations containing the words Refractory metals.

  2. 1. On the nucleation and solidification of silicon and refractory materials

    Author : Lena Magnusson; KTH; []
    Keywords : Solidification; Nucleation; Interstitials; Vacancies; Undercooling; Silicon; Refractory metals; Non-transition metals; Surface energy; Interface energy; Latent heat; TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : .... READ MORE

  4. 2. On the Nucleation and Inoculation of Metals

    Author : Lena Magnusson; Hasse Fredriksson; Peter Schumacher; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solidification; nucleation; inoculation; undercooling; interface energy; refractory metals; latent heat; inclusions; nodular cast iron; Materials science; Teknisk materialvetenskap;

    Abstract : Latent heat during recalesence and nucleation and post-recalesence temperature was analysed for refractory metals. An effect on latent heat was found by alloying the pure elements with other refractories. Latent heat was found to be 15-65% of tabulated values. Interface energy was evaluated from undercooling experiments. READ MORE

  5. 3. Microstructure and Mechanical Properties of Plasma Atomized Refractory Alloys

    Author : Marina Ciurans Oset; Farid Akhtar; Johanne Mouzon; Dariusz Jarzabek; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; plasma atomization; spherical powder; tungsten carbide; high entropy alloy; refractory; Engineering Materials; Materialteknik;

    Abstract : Plasma centrifugal atomization is a method widely used in the production of spherical powders of metals and alloys with relatively low melting points. A novel plasma centrifugal atomization process suitable for high melting point materials (i.e. 3500 ᵒC and above) was developed by Metasphere Technology AB, currently Höganäs Sweden AB. READ MORE

  6. 4. Investigation of compositionally complex refractory metal based thin films

    Author : Barbara Osinger; Erik Lewin; Ulf Jansson; Sebastian Siol; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Magnetron sputtering; Thin films; High entropy materials; Refractory metals; Transition metal carbides; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

    Abstract : The search for new and improved materials has led to the discovery and establishment of compositionally complex or high-entropy materials. The work in this thesis is focused on the investigation of new compositionally complex materials based on the refractory metals of groups 4-6. READ MORE

  7. 5. Microstructure and Mechanical Properties of Magnetron Sputtered Refractory Metal Thin Films

    Author : Stefan Fritze; Ulf Jansson; Erik Lewin; Petr Vasina; Uppsala universitet; []
    Keywords : thin films magnetron sputtering; refractory metals; high entropy alloys; mechanical properties; transition metal carbides; Kemi med inriktning mot materialkemi; Chemistry with specialization in Materials Chemistry;

    Abstract : The design and development of new multifunctional materials that exhibit a combination of high hardness and ductility, as well as a high corrosion resistance and thermal stability, is one of the key challenges in the field of material science. The focus of this thesis is on the development of novel multifunctional magnetron sputtered CrNbTaTiW–C based thin films. READ MORE