Browsing Institutt for materialteknologi by Title
Now showing items 8-27 of 2579
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A 2D sediment bed morphodynamics model for turbulent, non-Newtonian, particle-loaded flows
(Chapter, 2017)In petroleum drilling, cuttings transport problems, i.e. an accumulation of drilled of solids in the wellbore, are a major contributor to well downtime and have therefore been extensively researched over the years, both ... -
A combined isotropic, kinematic and distortional hardening model for aluminum and steels under complex strain-path changes
(Journal article; Peer reviewed, 2018)In this work, a new model is proposed for predicting stress transients caused by strain path changes. The model is formulated in stress space, where a second order tensor, i.e., the microstructure stress deviator, is used ... -
A Combined Thermal Cycle Software for Welded and Locally Heat Treated 6082 Aluminium Alloys
(Master thesis, 2020)Denne oppgaven dekker utviklingen av et kombinert termisk syklus-program for sveising og induksjon, Combined Weld and Induction Thermal Cycle software, som brukes til å estimere de termiske syklusene under sveising og lokal ... -
A Combined Upcycling Route for Silicon Powder Waste and a Silicon Alloy
(Master thesis, 2023)Silisium er et avgjørende element i produkter som omgir oss hver dag, som solcellepaneler, elektronikk og i kjemiske produkter. Behovet for en bærekraftig og sirkulær verdikjede for silisium er presserende. Dagens produksjon ... -
A comparative analysis of dual drilling methods as an aim to reduce the costs of drilling
(Bachelor thesis, 2021)De ulike konseptene for dual drilling er dual activity drilling, full dual drilling, top hole dual drilling, og dual riserless drilling er blitt gjennomgått basert på data og informasjon samlet sammen fra ulike aktører fra ... -
A Comparative Study of Different CFD-codes for Fluidized Beds
(Master thesis, 2023)Fluidiserte senger er viktige prosesser med mange bruksområder i ulike industrier. Ett av bruksområdene er som en tørrskrubber for å behandle avgass fra aluminiumsproduksjon. Økt etterspørsel etter aluminium i verden betyr ... -
A comprehensive study on improved power materials for high-temperature thermoelectric generators
(Journal article; Peer reviewed, 2019)Dense Ca3Co4O9-NaxCoO2-Bi2Ca2Co2O9 (CCO-NCO-BCCO) nanocomposites were produced from sol-gel derived Ca2.25Na0.3Bi0.35Tb0.1Co4O9 powder by four methods: Hot-pressing (HP), spark plasma sintering (SPS) and pressureless ... -
A computational study of recrystallisation and grain growth using a 3D Potts Monte Carlo model
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:34, Doctoral thesis, 2009)The ever increasing capability of computer systems and the advances in theoretical understanding of the underlying physics and chemistry of materials have, over the last couple of decades, provided the basis for mathematical ... -
A concept for electrowinning of aluminium using depolarized gas anodes
(Journal article; Peer reviewed, 2014)Aluminium is today commercially produced by the Hall-Héroult process using consumable carbon anodes. Consumable anodes have some concerns such as CO2 emission, continuous anodecathode distance adjustments and replacements ... -
A Finite-Size Study on Samarium-Substituted Bismuth Ferrite: Multiferroic and Lead-Free Piezoelectric Materials
(Master thesis, 2011)Multiferroic materials combine two or more ferroic orders such as ferroelectricity, ferromagnetism and ferroelasticity. They have a great interest for the development of the next generations of digital electronic memory ... -
A first-principles Study of epitaxial Interfaces between Graphene and GaAs
(Master thesis, 2014)Epitaxial interfaces between graphene and GaAs(111) have been investigated through a first-principles study using density functional theory (DFT). The GaAs(111) surface at the interface is assumed to be 2x2 reconstructed ... -
A First-Principles Study of the Al (001)/Fe(0-11) Interface
(Journal article; Peer reviewed, 2018)Two phase Stefan problem was solved using analytical method in cylindrical domain. To solve governing equations Eigen conditions were formulated by using separation of variable technique. Eigenvalues of the eigencondition ... -
A Method for Assessment of Recyclability of Aluminum from Incinerated Household Waste
(Journal article; Peer reviewed, 2019)Aluminum is widely used in daily household consumable goods such as food and drink packaging materials, storage containers, etc. The disposal of such goods into household waste means that this waste stream contains a ... -
A method for comparing the HF formation potential of aluminas with different water contents
(Chapter, 2012)In the aluminium industry today, smelters often have to rely on more than one alumina supplier. This creates diversity in the properties of smelter grade alumina (SGA). A method has been developed to compare the HF formation ... -
A Method for Controlled Oxide and Carbon Coating of Silicon Nanoparticles as Anode in Lithium-Ion Batteries
(Master thesis, 2017)Silicon has emerged as a promising alternative to graphite in lithium-ion batteries. Silicon can, theoretically, provide up to ten times higher capacity due to its high alloying capabilities with lithium. This improvement ... -
A method for describing systems of spherical droplets in vapor
(Master thesis, 2021)Det har lenge vært kjent at nanomaterialer har unike egenskaper som ikke observeres i materialer på større skala. Den unike oppførselen gjør også at nanosystemer ikke kan beskrives av de vanlige termodynamiske likningene, ... -
A methodology to assess the spatial distribution of dispersoids in AL-MG-Si alloys
(Chapter, 2018)Al-Mg-Si alloys often add small additions of e.g. Mn or Cr, to form dispersoids, which may act as nucleation sites for Mg2Si particles after homogenization. The purpose is to ensure a high density of uniformly distributed ... -
A microfluidic electrochemical cell with integrated PdH reference electrode for high current experiments
(Journal article; Peer reviewed, 2016)An on-chip thin-film palladium hydride reference electrode is described for use with microfluidic electrochemical cells. A Pd electrode fabricated by photolithographic methods is charged with hydrogen in-situ with a simple ... -
A microstructural study of a 3D-printed superalloy by electron beam melting for aero-engine applications
(Master thesis, 2024)Mikrostrukturen til en sprekkfri MAR-M247 superlegeringsdel produsert ved elektronstrålesmelting (EBM) har blitt undersøkt ved hjelp av flere karakteriseringsteknikker. To prøver ble undersøkt, hvorav den ene er hentet ut ... -
A Model Based Parametric Study of Alumina Feeding and Dissolution
(Bachelor thesis, 2020)Alumina blir brukt som råmateriale i den energikrevende Hall-Hèroult-prosessen for produksjon av aluminium. I denne prosessen blir aluminapulver matet til et kryolittbad med jevne mellomrom. Det utfordrende miljøet i den ...