• Hydraulic Characterization of Ceramic Foam Filters Used in Aluminum Filtration 

      Hassanabadi, Massoud; Berto, Thomas; Akhtar, Shahid; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2023)
      Ceramic Foam Filters (CFF) are frequently used during the filtration of aluminum (Al) melts to produce high-quality products. In the present study, the physical and hydraulic characteristics of alumina (Al2O3)-based CFF ...
    • Hydrides of Laves type Ti–Zr alloys with enhanced H storage capacity as advanced metal hydride battery anodes 

      Wijayanti, Ika Dewi; Denys, Roman Volodymyrovich; Suwarno, Suwarno; Volodin, Alexei A.; Lototskyy, Mykhaylo V.; Guzik, Matylda N.; Nei, Jean; Young, Kwo; Roven, Hans Jørgen; Yartys, Volodymyr (Peer reviewed; Journal article, 2020)
      The present work was focused on the studies of the effect of variation of stoichiometric composition of Ti–Zr based AB2±x Laves phase alloys by changing the ratio between A (Ti + Zr) and B (Mn + V + Fe + Ni) components ...
    • Hydrogen embrittlement and corrosion evaluation of Alloy 725 alloyed with B and Cu 

      Taji, Iman (Doctoral theses at NTNU;2023:40, Doctoral thesis, 2023)
      The need to achieve materials with higher strength and better corrosion resistance results in producing new alloys. Nickel base alloys are among the materials which have been subjected to several studies related to producing ...
    • Hydrogen induced stress cracking of alloy 718: Effects of chemical composition and microstructure 

      Haaland, Adrian Christian (Master thesis, 2014)
      This master thesis have examined the effect of variations in composition and microstructure on the HISC susceptibility of Inconel-718. 6 different Inconel-718 variants with different compositions and heat treatments were ...
    • Hydrogen Induced Stress Cracking of Inconel 625 - Effect of Production Method, Heat Treatment and Cold Working 

      Thorstensen, Eivind Bruun (Master thesis, 2016)
      The following work has examined the effect of heat treatment, production method and cold working (CW) on the hydrogen induced stress cracking (HISC) susceptibility of Inconel 625 (UNS N06625). This was done by hydrogen ...
    • Hydrogen Induced Stress Cracking of Spheroidal Graphite Cast Iron 

      Djupvik, Veronika (Master thesis, 2020)
      Abstract will be available on 2023-06-17
    • Hydrogen permeation in different microstructures of 66SiMnCrMo6-6-4 steel 

      Vågenes, Christian (Master thesis, 2023)
      Diffusiviteten til hydrogen i stål er bestemmes av ulike mekanismer som forårsaker sprøhet. Avhengig av mikrostrukturen kan hydrogensprøhet være forårsaket av mange typer mekanismer, som derfor gjør det utfordrende å forutsi ...
    • Hydrogen Porosity in Al-Si Foundry Alloys 

      Akhtar, Shahid (Doktoravhandlinger ved NTNU, 1503-8181; 2010:3, Doctoral thesis, 2010)
      Aluminium alloys based on the aluminium-silicon system are popular for automotive and aerospace applications, thanks to their high strength to weight ratio, excellent castability, and corrosion resistance. Microporosity ...
    • Hydrogen Storage in Mg-based Alloys Nanostructured by Rapid Solidification 

      Poletaev, Andrey A. (Doktoravhandlinger ved NTNU, 1503-8181; 2011:197, Doctoral thesis, 2011)
    • Hydrogen-Based Iron Recovery from Bauxite Residue 

      Velle, Sander Ose; Vollan, Frida; Skibelid, Olivia Bogen (Bachelor thesis, 2022)
      Valorisering av bauksittavfall er essensielt for bærekraftig produksjon av aluminium, og undersøkes videre i denne bacheloroppgaven. Hydrogenreduksjon av jernoksider i en blanding av bauksitt-avfall og kalkstein ble studert ...
    • Hydrogen-Based Iron Recovery from Bauxite Residue 

      Velle, Sander Ose; Vollan, Frida; Skibelid, Olivia Bogen (Bachelor thesis, 2022)
      Valorisering av bauksittavfall er essensielt for bærekraftig produksjon av aluminium, og undersøkes videre i denne bacheloroppgaven. Hydrogenreduksjon av jernoksider i en blanding av bauksitt-avfall og kalkstein ble studert ...
    • Hydrometallurgical Purification of Magnesium-Doped Silicon by Different Acids 

      Safarian, Jafar; Espelien, Stine (Chapter, 2017)
      The purification of commercial metallurgical grade silicon through alloying and then acid leaching is studied. Magnesium is added into molten silicon and then acid leaching of the solidified Si-Mg alloy by HCl, H2SO4 and ...
    • Hydrophobic Coatings for Anti-Icing Applications 

      Halvorsen, Aase Marie (Master thesis, 2014)
      The motivation for developing environmentally friendly and inexpensive solutions for anti-icing is high. The oil industry is heading toward arctic regions and the development of improved anti-icing techniques demands greater ...
    • Hydrophobic Coatings for Anti-Icing Applications 

      Raasok, Ellen-Kristin (Master thesis, 2014)
      The background for this Master s Thesis is to investigate materials and coatings for use in anti-icing applications. Icing is a problem in many different fields, from aeronautic transport, power lines, and wind turbines ...
    • Hydrophobic Coatings for Corrosion Inhibition in Closed Heating Systems 

      Jensen, Betina Nordby; Pettersen, Christina Glenna (Bachelor thesis, 2023)
      Evnen filmdannede aminer har til å beskytte karbonstål, kobber og aluminium fra korrosjon ble undersøkt gjennom å måle kontaktvinkler, hvor målet var å sjekke hydrofobisiteten. De tre filmdannende aminene som ble brukt var ...
    • Hydrothermal carbonization of olive wastes to produce renewable, binder-free pellets for use as metallurgical reducing agents 

      Surup, Gerrit Ralf; Leahy, James J.; Timko, Michael T.; Trubetskaya, Anna (Journal article, 2020)
      Torrefaction or hydrothermal carbonization processes were compared for conversion of olive pulp into metallurgical reducing agent. The dependence of yield, CO2 reactivity, and mechanical properties to reaction time and ...
    • Hydrothermal syntheis and characterization of BaTiO3 nanoparticles 

      Hempel, Frida Sveen (Master thesis, 2018)
      This thesis investigates the size dependent dipole disorder in ferroelectric materials, which leads to a loss of macroscopic ferroelectricity, and the role of the depolarization field on this disorder. Structural ...
    • Hydrothermal Synthesis of Alkali Niobates 

      Vadseth, Daniel Stormer (Master thesis, 2021)
      Reaksjonsforholdene under hydrotermal syntese av kalium- og natriumniobater har blitt undersøkt med hensikt å forstå effekten av reaksjonsforholdene på kinetikken, faseformasjonen, morfologien og gitteparametrene. Kalium ...
    • Hydrothermal synthesis of hexagonal YMnO3 and YbMnO3 below 250 °C 

      Marshall, Kenneth Paul; Eidem, Sigurd Opdal; Småbråten, Didrik Rene; Selbach, Sverre Magnus; Grande, Tor; Einarsrud, Mari-Ann (Peer reviewed; Journal article, 2021)
      The hydrothermal synthesis of hexagonal YMnO3 and YbMnO3 are reported using high KOH mineraliser concentrations (>10 M) and low temperatures (<240 °C). The relation between reaction parameters and resulting phase purity ...
    • Hydrothermal Synthesis of LaFeO3 

      Reksten, Anita (Master thesis, 2011)
      This work explores the hydrothermal synthesis of LaFeO3 (LFO) nanorods with a high aspect ratio. Synthesis of rod shaped LFO is a stepping stone to the synthesis of strontium doped LFO (LSF) nanorods with high aspect ratio. ...