Blar i Institutt for materialteknologi på tittel
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Dissolution kinetics of carbon materials in FeMn
(Doctoral theses at NTNU;2019:226, Doctoral thesis, 2019)Submerged electric arc furnace (SAF) is the main process for industrial production of ferroalloys, in which metal oxides are reduced by carbon. To decrease the production cost and reduce the CO2 emissions, a variety of ... -
Dissolution Rate and Wettability of SiO2-CaO-Al2O3 Slags on Quartz
(Master thesis, 2023)Denne studien har som mål å undersøke fuktningsgraden og reaksjonskinetikken av SiO2 –CaO–Al2O3 slagg på industriell kvarts for å forstå interaksjonene mellom industrislagg og -kvarts i silisium- og ferrosilisiumproduksjon. ... -
Distinguishing bainitic and martensitic microstructures in high strength steels using advanced characterization methods
(Master thesis, 2020)Gjennom dette arbeidet har to legeringer; 103Cr3/103C3 og 34CrNiMo6, blitt varmebehandlet til perlittisk/ferritisk, bainittisk og martensittisk struktur for å bli studert i SEM. Å skille mellom bainittiske og martensittiske ... -
Distinguishing Martensite from Ferrite in Mild Steels with EBSD using Dictionary Indexing
(Master thesis, 2023)Å få innsikt i strukturen og sammensetningen av materialer er avgjørende innen materialvitenskap. Elektron-tilbakespredningsdiffraksjon (EBSD) i elektronmikroskopet (SEM) er en mye brukt karakteriseringsteknikk som muliggjør ... -
Distribution of Aluminum and Calcium between Silicon and CaO-Al2O3-SiO2 Slags at 1650 °C
(Master thesis, 2020)Hovedformålet med oppgaven var å undersøke likevekten mellom silisium (Si) og calcia-alumina (CaO-Al2O3) slagger. Ved å variere forholdet mellom metall og slagg i dette systemet vil det ideelt sett bli en linje på i den ... -
Distribution of boron between silicon and CaO-SiO2, MgO-SiO2,CaO-MgO-SiO2 and CaO-Al2O3-SiO2 slags at 1600°C
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:326, Doctoral thesis, 2013)New energy sources are needed for a sustainable future. Solar cells have a huge potential as a sustainable energy source but further development of this technology is needed for solar cells to become cost-competitive with ... -
Distribution of Phosphorus between FeSi/Si and CaO-SiO2 Slags at 1600o C
(Master thesis, 2017)The aim of this thesis was to determine data for the phosphorus(P) distribution coefficients between ferrosilicon(FeSi) or silicon(Si) and calcia-silica(CaO SiO2) slags. The work was carried out due to inconsistencies ... -
Does power ultrasound (26 kHz) affect the hydrogen evolution reaction(HER) on Pt polycrystalline electrode in a mild acidic electrolyte?
(Peer reviewed; Journal article, 2020)In this study, we investigated the effects of power ultrasound (26 kHz, up to ∼75 W/cm2, up to 100% acoustic amplitude, ultrasonic horn) on the hydrogen evolution reaction (HER) on a platinum (Pt) polycrystalline disc ... -
Domain Engineering in Polycrystalline ErMnO3 Using Strain- and Electrical Fields
(Master thesis, 2022)Utforming av ferroelektriske domener er avgjørende for å bruke ferroelektriske materialer som elektroniske komponenter, eksempelvis kondensatorer, sensorer og transdusere. For tiden kan ferroelektriske domener kontrolleres ... -
Domain wall mobility and roughening in doped ferroelectric hexagonal manganites
(Peer reviewed; Journal article, 2020)The macroscopic performance of ferroelectric and piezoelectric devices depends strongly on domain wall dynamics. It is clear that structural defects, such as vacancies, interstitials, and dopants codetermine the dynamics, ... -
Domain-Pattern Transfer across an Artificial Magnetoelectric Interface
(Journal article; Peer reviewed, 2018)Magnetoelectric interfaces provide efficient pathways for manipulating the magnetic order with low-power-consuming electric fields. A prime example of this is the voltage-controlled domain-pattern transfer from a multiferroic ... -
Domain-wall engineering and topological defects in ferroelectric and ferroelastic materials
(Journal article, 2020)Ferroelectric and ferroelastic domain walls are 2D topological defects with thicknesses approaching the unit cell level. When this spatial confinement is combined with observations of emergent functional properties, such ... -
Domains and domain walls in ferroic materials
(Peer reviewed; Journal article, 2021)Ferroic materials exhibit long-range order with respect to their elastic, electric, or magnetic properties, giving rise to fascinating physics and functional properties that are used in, e.g., state-of-the-art sensor ... -
Domains and domain walls in multiferroics
(Journal article, 2020)Multiferroics are materials combining several ferroic orders, such as ferroelectricity, ferro- (or antiferro-) magnetism, ferroelasticity and ferrotoroidicity. They are of interest both from a fundamental perspective, as ... -
DSC analyses of static and dynamic precipitation of an Al-Mg-Si-Cu aluminum alloy
(Journal article; Peer reviewed, 2015)In the present investigation, both static and dynamic precipitations of an Al–Mg–Si–Cu aluminum alloy after solid-solution treatment (SST) were comparatively analyzed using differential scanning calorimetry (DSC). Dynamic ... -
Ductility investigation of extruded profiles in an AA6063 alloy
(Master thesis, 2020)I bilindustrien jobbes det konstant mot å finne lettere, sterkere og mer kostnadseffektive materialer til produksjon og prosessering av bildeler. Dette fører til et større krav om kunnskap til materialenes mekaniske ... -
Duplex Process to Produce Ferromanganese and Direct Reduced Iron by Natural Gas
(Peer reviewed; Journal article, 2021)The application of natural gas instead of solid carbon to produce ferromanganese is a way forward in sustainable development. Mass and energy balances for an integrated duplex process to produce ferromanganese and direct ... -
Dye-sensitized solar cells with zinc oxide electrodes - Improving the electrodeposition of ZnO and investigating the electrode lifetime.
(Master thesis, 2019)Fargestoff-solceller er et spennende område innen fornybar energi. Disse solcellene åpner nye anvendelsesområder sammenlignet med silisium-cellene som dominerer dagens marked. Fargestoff-solceller kan lages gjennomsiktige ... -
Dynamic behaviour of fuel cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:94, Doctoral thesis, 2006)This thesis addresses the dynamic behaviour of proton exchange membrane fuel cells (PEMFCs) and alkaline fuel cells (AFCs). For successful implementation in automotive vehicles and other applications with rapidly varying ... -
Dynamic Current and Power Distributions in a Submerged Arc Furnace
(Journal article; Peer reviewed, 2019)Most submerged arc furnaces used for the production of ferroalloys run on three-phase alternating current. This affects the electrical operation of the furnace and thus it is of interest to study alternating current ...