Sökning: "Rapid solidification"

Visar resultat 16 - 19 av 19 avhandlingar innehållade orden Rapid solidification.

  1. 16. Microstructure and Mechanical Properties of Plasma Atomized Refractory Alloys

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

    Sammanfattning : 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. LÄS MER

  3. 17. Equilibrium and Kinetic Considerations in Refining of Silicon

    Författare :Jesse Franklin White; Sichen Du; Kenneth Coley; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The purity requirements for photovoltaic-grade (PV) silicon are very stringent. In PV applications, purified silicon is either doped with boron or phosphorous, so the levels of these particular elements have to be tightly controlled. LÄS MER

  4. 18. In-situ analysis of process characteristics in Directed Energy Deposition

    Författare :Tobias Hauser; Alexander Kaplan; Joerg Volpp; Barbara Previtali; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Produktionsutveckling; Manufacturing Systems Engineering;

    Sammanfattning : In recent years, the interest in Additive Manufacturing on an industrial scale has risen due to the various new processes and the increase in potential use cases. In this thesis, the two Additive Manufacturing processes, Wire Arc Additive Manufacturing and Laser Metal Deposition were investigated. LÄS MER

  5. 19. Investigations of passive safety systems in LWRs : melt coolability with bottom coolant injection, light gas effects on a passive containment cooling system

    Författare :Domenico Paladdino; KTH; []
    Nyckelord :;

    Sammanfattning : The key objectives in introducing passive features in thesafety systems for Light Water Reactor (LWR) are to increasetheir reliability, to simplify the design of the plants and toimprove performance and economics. Component and integralsystem tests in scaled facilities are required for optimizingthe design and for certification of these safety systems. LÄS MER