Blar i Institutt for materialteknologi på tittel
Viser treff 276-295 av 2496
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Characterization of Defects in N-type Cz Silicon for Solar Cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:269, Doctoral thesis, 2012)With increasing attention to high efficiency solar cells in the photovoltaic industry, ntype Cz silicon has become increasingly popular due to its potential for high-end devices. As the metal content in Cz silicon is reduced ... -
Characterization of Extruded Aluminium Alloys from Ram Extrusion and Screw Extrusion
(Master thesis, 2020)I denne oppgaven ble skruekstrudering sammenlignet med konvensjonell pressekstrudering for tre 6xxx legeringer. Effekten av ekstrudering og påfølgende varmebehandling ble undersøkt ved optisk mikroskopi, hardhetstesting ... -
Characterization of ferroelectric domain walls by scanning electron microscopy
(Peer reviewed; Journal article, 2020)Ferroelectric domain walls are a completely new type of functional interface, which have the potential to revolutionize nanotechnology. In addition to the emergent phenomena at domain walls, they are spatially mobile and ... -
Characterization of Flooring Composites
(Master thesis, 2017)The possibility of reinforcing high-pressure laminates with particles of yttria-stabilized zirconia has been investigated. The particles were embedded in a matrix of melamine formaldehyde resin, and several parameters, ... -
Characterization of Fluid Flow for Rigid Glass Weave Filters (RGW)
(Bachelor thesis, 2022)Filtrering av metallinklusjoner er et viktig steg i støpningsprosessen for å forsikre renhetskravet. I denne forstand er utvikling av nye metallfiltreringsteknologier interessant. En slik teknologi er Rigid Glass Weave ... -
Characterization of Fluid Flow for Rigid Glass Weave Filters (RGW)
(Bachelor thesis, 2022)Filtrering av metallinklusjoner er et viktig steg i støpningsprosessen for å forsikre renhetskravet. I denne forstand er utvikling av nye metallfiltreringsteknologier interessant. En slik teknologi er Rigid Glass Weave ... -
Characterization of industrial hydrocarbon samples from anode baking furnace off-gas treatment facility
(Peer reviewed; Journal article, 2023)Polycyclic aromatic hydrocarbons (PAHs) are naturally present in raw materials used as a binder in prebaked anodes for electrolysis of aluminum. Green anodes are baked to about 1200 °C through a cycle of 14–17 days where ... -
Characterization of Iron Bearing Particles in Relation to Fir-Tree Structure in Al-Mg Alloys
(Master thesis, 2018)Fir-tree structure is a well-known problem related to DC cast AA1xxx and AA5xxx alloys. During DC casting different iron bearing particles, e.g. AlmFe, Al3Fe and Al6Fe, are formed. A change of the dominating iron bearing ... -
Characterization of light induced degradation in crystalline silicon
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:, Doctoral thesis, 2013)Light induced degradation is an unfortunate characteristic of a very commonly used silicon material for solar cells: boron-doped Czochralski silicon. The degradation is attributed to a recombination center that is activated ... -
Characterization of Polymetallic Manganese Nodules and Reduction by Hydrogen and Methane
(Bachelor thesis, 2022)Feltet havbunns gruvedrift har blitt utforsket siden 1800-tallet, med stor utvikling rundt 1970- tallet. P˚a grunn av en økning i etterspørselen etter verdifulle metaller slik som kobber, kobolt og nikkel har dette feltet ... -
Characterization of precipitates at maximum hardness and overaged conditions in Al-Mg-Si alloys
(Master thesis, 2011)A study of the influence of artificial ageing temperature on the precipitation behaviour in three distinct direct chill casted and extruded Al-Mg-Si alloys has been carried out. The total amount of alloying elements is ... -
Characterization of recycle-like Al-Si alloys processed by severe plastic deformation
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:277, Doctoral thesis, 2008)Three aluminium alloys from the Al-Si-Fe system were selected as an object of the present study. The chemistry of the investigated materials, with relatively large additions of iron and silicon, was selected to obtain large ... -
Characterization of Screw Extruded Rapid Solidified AA6061
(Master thesis, 2014)By using rapid solidified aluminium as feedstock and a novel extrusion method, i.e. screw extrusion, it is possible to extrude aluminium continuously. Due to rapid solidification, the base material can have small grain ... -
Characterization of Structure and Optical Properties of Diatoms for improved Solar Cell Efficiency
(Master thesis, 2011)Interest in renewable energy resources has increased in recent years, and solar cells are one of the areas that have been subject to intensive research. For solar energy to develop into a competitive alternative to fossil ... -
Characterization of the Density and Spatial Distribution of Dispersoids in Al-Mg-Si Alloys
(Journal article; Peer reviewed, 2019)Al-Mg-Si alloys often contain small additions of, for example, Mn or Cr, to form dispersoids, which may act as nucleation sites for Mg2Si particles after homogenization. The purpose of adding Mn and Cr is to ensure a high ... -
Characterization of the Microstructural Development through Screw Extrusion of AA6060 and AA6082
(Master thesis, 2021)Økt resirkulering av materialer vil spille en avgjørende rolle i å fremskynde overgangen til en mer bærekraftig fremtid og sirkulær økonomi. Skruekstrudering er en nyskapende resirkuleringsteknologi som omdanner skrap til ... -
Characterization the softening behavior of cold rolled AlMnFeSi-alloys during conditions of concurrent precipitation
(Journal article, 2013)In the present work an Al-Mn-(Fe-Si) model alloy has been subjected to different homogenization treatments, to achieve materials with different microchemistry states in terms of constituents, levels of Mn in solid solution ... -
Characterization, Calcination and Pre-Reduction of Polymetallic Manganese Nodules by Hydrogen and Methane
(Peer reviewed; Journal article, 2022)A polymetallic manganese nodule was characterized and further calcined and pre-reduced by H2, CH4, and H2-CH4 mixtures at elevated temperatures. It was found that the main Mn and Fe elements coexisted in the ore in different ... -
Characterization, thermodynamics and mechanism of formation of SiC-SiOx core–shell nanowires
(Peer reviewed; Journal article, 2020)Silicon carbide nanowires are valuable for electronic and optical applications, due to their high mechanical and electrical properties. Previous studies demonstrated that nanowires can be produced easily, by mixing a ... -
Characterizing hardening on annealing of cold-rolled aluminum AA3103 strips
(Journal article; Peer reviewed, 2013)AA3103 aluminum strips were cold rolled to various von Mises strains up to 4.7. In addition, two severely deformed conditions were obtained by one and four cycles of cold accumulated roll bonding subsequent to cold rolling ...