Browsing Institutt for materialteknologi by Issue Date
Now showing items 921-940 of 2540
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Al-5Cu alloy processed by equal-channel angular pressing
(Journal article; Peer reviewed, 2017)An ECAP (equal channel angular pressing) processed UFG Al-5Cu alloy was characterized by electron backscatter diffraction (EBSD). It is revealed that a bimodal grain structure, i.e. ultrafine grains accompanied by micron-sized ... -
Performance of Al-5Ti-1B master alloy after ball milling on minimizing hot tearing in Al-7Si-3Cu alloy
(Journal article; Peer reviewed, 2017)Hot tearing of Al–7Si–3Cu alloys with addition of as received Al–5Ti–1B grain refiner and ball milled grain refiner have been studied with constrained mould casting to investigate the effect of these additions on hot tear ... -
Formation mechanism and growth of MNbO3,M=K, Na by in situ X-ray diffraction
(Journal article; Peer reviewed, 2017)Hydrothermal synthesis is a well-established method to produce complex oxides, and is a potential interesting approach to synthesize stoichiometric lead-free piezoelectric K0.5Na0.5NbO3. Due to challenges in obtaining the ... -
Optimization of Electrical Conductivity in Screw Extruded Wires
(Master thesis, 2017)The novel production method of screw extrusion was used to produce an electrical conducting wire of commercial pure aluminium. To optimize electrical properties, effects of impurity atoms in solid solution were examined ... -
Pilot Scale Production of Manganese Ferroalloys Using Heat-Treated Mn-Nodules
(Journal article; Peer reviewed, 2017)Pilot-scale experiments are one way to investigate the process patterns and the reaction mechanisms of processes and raw materials. To understand a process fully, both theoretical considerations as well as small-scale ... -
A multiscale numerical approach of the dripping slag in the coke bed zone of a pilot scale Si-Mn furnace
(Chapter, 2017)The Si-Mn alloy process production in submerged arc furnaces (SAF) is investigated. The aim of the studies currently in progress is an enhancement of the knowledge about the key reactions and the mass transport phenomenon ... -
Characterization and Modelling of the Microstructure and Texture Evolution In AlMgSi-Extrusions
(Journal article, 2017)The properties and surface appearance of aluminium extrusion are critically dependent on the microstructure and texture of the extruded profiles, and the requirements with respect to these aspects may vary with applications. ... -
Characterization of Coextruded Rods with Al-4,5Mg as the Base Alloy and Rapidly Solidified Al-4,5Mg-1Ag as the Surface Alloy
(Master thesis, 2017)Coextruded rods with Al-4,5wt%Mg as the base alloy and rapidly solidified Al-4,5wt%Mg-1wt%Ag as the surface alloy has been characterized. Precipitation hardening, light microscopyand scanning electron microscopy (SEM) ... -
Natural Gas Anodes of Porous Graphite for Aluminium Electrolysis
(Doctoral theses at NTNU;2017:266, Doctoral thesis, 2017)Aluminium is the second metal produced in the world in terms of quantity. It is produced in a multistage process. First, aluminium ore is converted to pure aluminium oxide. The second stage is an electrolysis process. In ... -
In situ and operando observation of surface oxides during oxygen evolution reaction on copper
(Journal article; Peer reviewed, 2017)Formation and dissolution of oxide on copper under transpassive conditions, i.e. during OER and transpassive dissolution, in alkaline electrolyte was investigated by a combination of electrochemical techniques and in situ ... -
Heterogeneous nucleation and grain growth of inoculated aluminium alloys: An integrated study by in-situ X-radiography and numerical modelling
(Journal article; Peer reviewed, 2017)A comprehensive study on the heterogeneous nucleation and grain growth of Al-10 wt.%Cu alloys inoculated with Al-5Ti-1B was carried out. To further reveal the solute segregation stifling mechanism, in-situ near-isothermal ... -
Spatially Confined Spin Polarization and magnetic sublattice control in (La,Sr)MnO3−δ Thin Films by Oxygen Vacancy Ordering
(Journal article; Peer reviewed, 2017)Perovskite oxides are known for their strong structure property coupling and functional properties such as ferromagntism, ferroelectricity and high temperature superconductivity. While the effect of ordered cation vacancies ... -
Revealing the Slow Decomposition Kinetics of Type-I clathrate Ba8Ga16Ge30
(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, ... -
Cyclodextrins as carriers for organic corrosion inhibitors in organic coatings
(Journal article; Peer reviewed, 2017) -
Progression of reduction of MoO3 observed in powders and solution-processed films
(Journal article; Peer reviewed, 2017)Understanding the reduction of MoO3 is important for the utilization of this material in optoelectronic applications. Here, we examine the changes that take place during reduction of a solution-processed thin film of MoO3. ... -
Translational and Rotational Motion of C8 Aromatics Adsorbed in Isotropic Porous Media (MOF-5): NMR Studies and MD Simulations
(Journal article; Peer reviewed, 2017)We combined nuclear magnetic resonance (NMR) and molecular dynamics (MD) simulation to study xylene behavior in MOF-5, probing the effects of adsorbate geometry in a weakly interacting model isotropic metal organic framework ... -
On the effect of calcium lignosulfonate on the rheology and setting time of cement paste
(Journal article; Peer reviewed, 2017)The effect of softwood calcium lignosulfonate, LSs, on the rheology and setting time of cement paste has been investigated. Two Portland cements with different surface area and C3A content were used. The lignosulfonate was ... -
Iron Separation from Bauxite Through Smelting-Reduction Process
(Chapter, 2017)In the alumina production process through the dominant commercial Bayer process red mud, which is not consumable and causes serious environmental challenges is produced. Alternative sustainable process for bauxite treatment ... -
A new material for oxygen-permeable membranes
(Master thesis, 2017)In this study, hexagonal YMnO3 doped with 15% Ti was used in the preparation of an asymmetric oxygen permeable membrane. Several different methods for the fabrication of the asymmetric membrane have been used, and the ... -
Life cycle greenhouse gas emission analysis of single-family Norwegian Zero Emission pilot Buildings and concepts
(Doctoral theses at NTNU,2017:359, Doctoral thesis, 2017)Can a life cycle single-family Zero Emission Building (ZEB-OM) be achieved in Norway? What have we learned from designing and building single-family Zero Emission pilot Buildings with respect to greenhouse gas (GHG) emission ...