Browsing Fakultet for naturvitenskap (uspesifisert) by Subject "TECHNOLOGY: Materials science"

Now showing items 1-11 of 11

    • Behaviour of nickel, iron and copper by application of inert anodes in aluminium production 

      Lorentsen, Odd-Arne (Dr. ingeniøravhandling, 0809-103X; 2000:104, Doctoral thesis, 2000)
      A thorough investigation was performed on the behaviour of Ni, Fe and Cu oxides dissolved in cryolite melts, and the solubility of these species was measured as a function of alumina content, NaF/AlF3 molar ratio (CR) and ...

    • Evolution of Alpha Phase Alumina in Agglomerates upon Addition to Cryolitic Melts 

      Østbø, Niels Peter (Dr. ingeniøravhandling, 0809-103X; 2002:50, Doctoral thesis, 2002)
      Rapid dissolution of alumina upon addition to the cryolitic melt is crucial for the modern Hall-Heroult process for aluminium production. The formation of slow - dissolving alumina agglomerates may be detrimental, and ...

    • Flow and Heat Transfer in a Radially Spreading Liquid Metal Jet Related to Casting of Ferroalloys 

      Haaland, Harald (Dr. ingeniøravhandling, 0809-103X; 2000:83, Doctoral thesis, 2000)
      In the past more and more advanced and fine-tuned processes for steel production have resulted in increased demands for new and more costeffective ferroalloys used as constituents in the processes. Casting techniques and ...

    • Plastic Deformation at Moderate Temperatures of 6XXX-series Aluminium Alloys 

      Aastorp, Knut Iver (Dr. ingeniøravhandling, 0809-103X; 2002:12, Doctoral thesis, 2002)
      The present work has been carried out in order to investigate Al-Mg-Si alloys that are deformed at moderate temperatures. These temperatures are in the range between 200 C and 300 C. Also some experiments are performed at ...

    • Rapid Solidification of AB5 Hydrogen Storage Alloys 

      Gulbrandsen-Dahl, Sverre (Dr.ingeniøravhandling, 0809-103X; 2002:7, Doctoral thesis, 2002)
      This doctoral thesis is concerned with rapid solidification of AB5 materials suitable for electrochemical hydrogen storage. The primary objective of the work has been to characterise the microstructure and crystal structure ...

    • Refining and Recycling of Silicon: A Review 

      Ciftja, Arjan (Research report, 2008)
      Silicon has a very broad spectrum of usage nowadays and it lies at the heart of much modern technology. It is the most abundant element in the earth’s crust after oxygen. Indeed, it’s use ranges from such bulk commodities ...

    • Rheology and Reactivity of Cementitious Binders with Plasticizers 

      Vikan, Hedda Vestøl (Doktoravhandlinger ved NTNU, 1503-8181; 2005:189, Doctoral thesis, 2005)
      The rheological behaviour of cementitious pastes has been studied by various means. Six different cements have been studied in main parts of the work and all of them have been characterized according to the Rietveld method ...

    • Steam explosions during granulation of Si-rich alloys.: Effect of Al- and Ca-additions 

      Hildal, Kjetil (Dr.ingeniøravhandling, 0809-103X; 2002:43, Doctoral thesis, 2002)
      Steam explosions are possible during granulation of Si and FeSi75. These explosions are a great hazard, and must be avoided. Norwegian ferroalloy producers have initiated a research program to learn more about such violent ...

    • Thermal Reactivity and Structure of Carbonized Binder Pitches 

      Madshus, Stian (Doktoravhandlinger ved NTNU, 1503-8181; 2005:83, Doctoral thesis, 2005)
      Pitches are used on a large scale in the manufacture of carbon anodes for the production of primary aluminium. The role of the pitch is to act as a binder between the petroleum coke grains. The structure of the carbonized ...

    • Wettability of Silicon with Refractory Materials: A Review 

      Ciftja, Arjan (Research report, 2008)
      The wettability of ceramics by liquid metals is a key fac¬tor in many fields of high temperature materials science and engineering. The wetting behavior of liquid-silicon/refractory-materials system is especially important ...

    • Work Hardening and Mechanical Anisotropy of Aluminium Sheets and Profiles 

      Ryen, Øyvind (Dr. ingeniøravhandling, 0809-103X; 2003:105, Doctoral thesis, 2003)
      The processing of aluminium alloys from casting to end product is associated with a large number of metallurgical phenomena. In order to further improve and optimise process routes and alloys, a thorough understanding of ...