Browsing Institutt for materialteknologi by Title

Now showing items 1932-1951 of 2504

    • Revealing the Slow Decomposition Kinetics of Type-I clathrate Ba8Ga16Ge30 

      Reardon, Hazel; Blichfeld, Anders Bank; Kasai, Hidetaka; Yin, Hao; Bøjesen, Espen Drath; Iversen, Bo B (Journal article; Peer reviewed, 2017)
      Inconsistencies in high temperature thermoelectric property measurements of Ba8Ga16Ge30 have prompted our study on the thermal stability of this heavily studied inorganic clathrate. Using X-ray diffraction, thermal analysis, ...

    • Revealing the Subsurface Basal <a> Dislocation Activity in Magnesium Through Lattice Rotation Analysis 

      Zhou, Bijin; Wang, Leyun; Liu, Wenjun; Zeng, Xiaoqin; Li, Yanjun (Peer reviewed; Journal article, 2020)
      A method was proposed in this study to reveal the subsurface basal dislocation activity in Mg-Y alloy and determine the corresponding Burgers vector. This is achieved by correlating the slip directions of dislocations to ...

    • Review of Aluminum Alloy Development for Wire Arc Additive Manufacturing 

      Langelandsvik, Geir; Akselsen, Odd Magne; Furu, Trond; Roven, Hans Jørgen (Peer reviewed; Journal article, 2021)
      Processing of aluminum alloys by wire arc additive manufacturing (WAAM) gained significant attention from industry and academia in the last decade. With the possibility to create large and relatively complex parts at low ...

    • A Review of Ferroalloy Tapping Models 

      Bublik, Sergey; Olsen, Jan Erik; Loomba, Varun; Reynolds, Quinn Gareth; Einarsrud, Kristian Etienne (Peer reviewed; Journal article, 2021)
      Tapping is an important furnace operation in the ferroalloy industry and poses a number of complex and coupled challenges of both practical and economical importance. Owing to the hazardous high-temperature conditions ...

    • Revisiting Polytetrafluorethylene Binder for Solvent-Free Lithium-Ion Battery Anode Fabrication 

      Zhang, Yang; Huld, Frederik; Lu, Song; Jektvik, Camilla; Lou, Fenliu; Yu, Zhixin (Journal article; Peer reviewed, 2022)
      Solvent-free (SF) anodes with different carbon materials (graphite, hard carbon, and soft carbon) were fabricated to investigate the stability of different anodes with polytetrafluorethylene (PTFE) degradation. The graphite ...

    • Revisiting the Crystal Structure of Rhombohedral Lead Metaniobate 

      Olsen, Gerhard H.; Sørby, Magnus Helgerud; Hauback, Bjørn; Selbach, Sverre Magnus; Grande, Tor (Journal article; Peer reviewed, 2014)
      Lead metaniobate (PbNb2O6) can exist both as a stable rhombohedral and a metastable orthorhombic tungsten-bronze-type polymorph. While the orthorhombic is a well-known ferroelectric material, the rhombohedral polymorph ...

    • Rheological Characterization of Fluid Models for Pitch and Binder Matrix in Anodes 

      Hansen, Lene Jensberg (Master thesis, 2019)
      Karbonanoder brukes til å produsere primæraluminium og forbrukes i løpet av elektrolysen. Anodene må derfor kontinuerlig erstattes og produseres. Problemer relatert til prosesseringen av anoder inkluderer heterogen tetthet ...

    • Rheological Characterization of Oil-Based Mud Enhanced with Micro-Cellulose 

      Abraham, Helen; Tvedt, Amund Garsrud; Moe, Preben Dreyer (Bachelor thesis, 2020)
      I denne studien ble de reologiske og filtreringsegenskapene til oljebasert borevæske forbedret med mikrocellulose, karakterisert og analysert. Det ble antatt at tilsetningen av mikrocellulose i borevæsken ville gi høy ...

    • Rheological Characterization of Pitch and Binder Matrix with Different Concentrations of Fine Particles 

      Mollaabbasi, Roozbeh; Hansen, Lene Jensberg; Barry, Thierno Saidou; Grande, Tor; Taghavi, Seyed Mohammad; Ziegler, Donald P; Alamdari, Houshang (Journal article, 2019)
      Green anodes consist of coarse coke particles surrounded by a binder matrix, which is a viscoelastic material and is made of fine coke particles and coal-tar pitch. During the compaction process, the coarse particles ...

    • Rheological properties of Al2O3–CaO–SiO2 slags 

      Tang, Kai; Eijk, Casper van der; Gouttebroze, Sylvain; Du, Qiang; Safarian, Jafar; Tranell, Gabriella (Peer reviewed; Journal article, 2022)
      The Al2O3–CaO–SiO2 ternary is a basic oxide system relevant for the Pedersen alumina production process and for aluminothermic silicon production with low environmental impact using secondary aluminium and silica raw ...

    • Rigid bonded glass ceramic seals for high temperature membrane reactors and solid oxide fuel cells 

      Paulsen, Ove (Doktoravhandlinger ved NTNU, 1503-8181; 2009:85, Doctoral thesis, 2009)

    • Road-map for gas in the Norwegian metallurgical industry: greater value creation and reduced emissions 

      Dalaker, Halvor; Ringdalen, Eli; Kolbeinsen, Leiv; Mårdalen, Jostein (Research report, 2017)
      In order to increase the use of gas in metal production, we will need to develop new – and to further develop existing – gas-based technologies, which will need to be adopted on an industrial scale. In order to provide a ...

    • A robust algorithm for rate-independent crystal plasticity 

      Manik, Tomas; Moradi Asadkandi, Hassan; Holmedal, Bjørn (Peer reviewed; Journal article, 2022)
      A new stable return-mapping algorithm enables crystal-plasticity solutions by using a regularized yield surface with very large exponents, for which the rate-independent limit of the Schmid assumption in practice is reached. ...

    • A Robust Image Processing Algorithm for Optical-Based Stress–Strain Curve Corrections after Necking 

      Lu, Feng; Manik, Tomas; Andersen, Ida Lægreid; Holmedal, Bjørn (Peer reviewed; Journal article, 2021)
      To determine the stress–strain curve of a ductile material up to the fracture from a tensile test, the necking contour is measured by an optical measurement technique. The radius of the minimal cross-sectional area and the ...

    • Role of aluminium hydrides in localised corrosion of aluminium revealed by operando Raman spectroscopy 

      Mysliu, Erlind; Lunder, Otto; Erbe, Andreas (Peer reviewed; Journal article, 2023)
      Filiform corrosion (FFC) is characteristic of metals such as aluminium and magnesium, usually takes place on coated metals, and spreads from coating defects in the form of filaments with a width on the order of 100 μm. In ...

    • The Role of Boron in Low Copper Spheroidal Graphite Irons 

      Bugten, Andreas Voll; Michels Brito Miranda, Leander Edward; Brurok, Rune Botnmark; Hartung, Cathrine; Ott, Emmanuelle; Vines, Lasse; Li, Yanjun; Arnberg, Lars Erik; Sabatino, Marisa Di (Peer reviewed; Journal article, 2023)
      The effects of boron at concentrations ranging from 5 to 525 ppm in low copper spheroidal graphite iron (SGI) has been studied. At 130 to 140 ppm, no particular effect of boron was observed on the size distributions, number ...

    • Role of cementite morphology on corrosion layer formation of high-strength carbon steels in sweet and sour environments 

      Karimi, Shabnam; Taji, Iman; Hajilou, Tarlan; Palencsar, Simona; Dugstad, Arne; Barnoush, Afrooz; Verbeken, Kim; Depover, Tom; Johnsen, Roy (Peer reviewed; Journal article, 2023)
      The effect of cementite morphology on the corrosion layer formation of four high-strength carbon steels was studied in an aqueous solution containing CO2 and CO2/H2S. The linear polarization resistance and weight loss data ...

    • Role of Filler Content and Morphology in LLZO/PEO Membranes 

      Din, Mir Mehraj Ud; Häusler, M.; Fischer, S.M.; Ratzenböck, K.; Chamasemani, F.F.; Hanghofer, I.; Henninge, V.; Brunner, R.; Slugovc, C.; Rettenwander, Daniel (Journal article; Peer reviewed, 2021)

    • The role of grain boundary plane in slip transfer during deformation of magnesium alloys 

      Zhou, Bijin; Li, Yanjun; Wang, Leyun; Jia, Hailong; Zeng, Xiaoqin (Peer reviewed; Journal article, 2022)
      Slip transfer across grain boundaries (GBs) is an important mechanism for HCP metals to accommodate intergranular deformation incompatibility. In this work, an in-situ SEM/EBSD study was conducted to study basal-slip-induced ...

    • Role of Lone Pair Cations in Ferroelectric Tungsten Bronzes 

      Olsen, Gerhard Henning; Sørby, Magnus Helgerud; Selbach, Sverre Magnus; Grande, Tor (Journal article; Peer reviewed, 2017)
      The role of lone pair cations in tetragonal tungsten bronze (TTB) ferroelectrics has so far not been addressed in detail despite the importance of lone pairs for the polarization mechanism in the prototype ferroelectric ...