Sökning: "coalescence model"

Visar resultat 16 - 20 av 41 avhandlingar innehållade orden coalescence model.

1. 16. Fundamental processes in thin film growth : The origin of compressive stress and the dynamics of the early growth stages

   Författare :Daniel Magnfält; Ulf Helmsersson; Eric Chason; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : The fundamental mechanisms behind the generation of compressive stresses in polycrystalline thin films, the effects of pulsed deposition fluxes on the dynamics of the early growth stages as well as the generation of energetic Ar+ ions in high power impulse magnetron sputtering (HiPIMS) discharges has been studied in this thesis.It was found that compressive film stresses in Mo films deposited using energetic vapor fluxes are correlated with high film densities while only a slight lattice expansion compared to relaxed Mo was found. LÄS MER

3. 17. Nano- and mesoscale morphology evolution of metal films on weakly-interacting surfaces

   Författare :Bo Lü; Kostas Sarakinos; Peter Münger; Thomas Michely; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Thin films are structures consisting of one or several nanoscale atomic layers of material that are used to either functionalize a surface or constitute components in more complex devices. Many properties of a film are closely related to its microstructure, which allows films to be tailored to meet specific technological requirements. LÄS MER

4. 18. Neutron-Induced Light-Ion Production from Iron and Bismuth at 175 MeV

   Författare :Riccardo Bevilacqua; Stephan Pomp; Jan Blomgren; Michael Österlund; Anthony Cowley; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

   Sammanfattning : Radioactive waste management is one of the key issues in sustainability of nuclear energy production. Geological repositories represent today the most appropriate solution to long-term management of high-level radioactive waste. LÄS MER

5. 19. Ductile failure and rupture mechanisms in combined tension and shear

   Författare :Imad Barsoum; Jonas Faleskog; Björn Skallerud; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Other engineering mechanics; Övrig teknisk mekanik;

   Sammanfattning : This licentiate thesis is generally concerned with the ductile failure and rupture mechanisms encountered under combined tension and torsion loading. In the first part entitled Paper A, an experimental investigation of the rupture mechanisms in a mid-strength and a high strength steel was conducted employing a novel test configuration. LÄS MER

7. 20. Growth and Removal of Inclusions During Ladle Stirring

   Författare :Mats Söder; KTH; []
   Nyckelord :inclusions; ladle; gas-stirring; induction-stirring; secondary refining; bubble flotation;

   Sammanfattning : The growth and removal of inclusions in stirred ladles hasbeen studied. First, the importance of different growthmechanisms suggested in the literature were studied. Simulationresults from a fundamental model of an induction-stirred ladlehave been used as input in the calculations. LÄS MER