Blar i Institutt for materialteknologi på utgivelsesdato
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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 ... -
Gas electrodes with nickel based current collectors for molten carbonate electrolyte thermo-electrochemical cells
(Journal article; Peer reviewed, 2019)Thermo-electrochemical cells with inexpensive molten carbonate electrolyte and (CO2|O2) gas electrodes allow the possible conversion of high temperature waste heat from industrial processes into electricity. The cell ... -
Design og fabrikasjon av undervannsstrukturer - Sveisegeometri og inspeksjonskategori - påvirkning på fabrikasjonskostnader
(Bachelor thesis, 2019)Denne bacheloren omhandler design og fabrikasjon av subsea-strukturer. Det vil bli fokusert på mulighetene for å redusere produksjonskostnader på hovedståletet til en manifold. For å oppnå dette blir det sett på mulighetene ... -
Performance and failure analysis of full cell lithium ion battery with LiNi0.8Co0.15Al0.05O2 and silicon electrodes
(Journal article; Peer reviewed, 2019)The influence of the lithium inventory on the performance and degradation mechanism of NCA||Si cells operating at a third of the theoretical silicon capacity is analysed. The lithium inventory was increased by electrochemical ... -
Softening and Melting Properties of Quartz
(Master thesis, 2019)Denne masteroppgaven beskriver en undersøkelse av smelteegenskaper til tre forskjellige kvartstyper, som brukes i silisiumproduksjon, og effekten kvartskvalitet kan ha på ovnens ytelse. Dette ble gjort ved å: • Måle ... -
Microstructural and compositional optimization of La0.5Ba0.5CoO3−δ—BaZr1−zYzO3−δ (z=0, 0.05 and 0.1) nanocomposite cathodes for protonic ceramic fuel cells
(Journal article; Peer reviewed, 2019)Cathodes are one of the key components of protonic ceramic fuel cells (PCFCs) requiring further development to enhance the performance of PCFCs. This encompasses the optimization of material compositions and microstructures, ... -
Nano-scale characterisation of sheared β” precipitates in a deformed Al-Mg-Si alloy
(Journal article; Peer reviewed, 2019)This paper compares the nano-scale structure of β” precipitates in a peak-aged Al-Mg-Si alloy before and after deformation. Three complementary advanced transmission electron microscopy techniques are used to reveal the ... -
Analysis of the Interplay Between Thermo-solutal Convection and Equiaxed Grain Motion in Relation to Macrosegregation Formation in AA5182 Sheet Ingots
(Peer reviewed; Journal article, 2019)Shrinkage induced flow, thermo-solutal convection and equiaxed grain motion are the major transport mechanisms contributing to macrosegregation formation in aluminum alloys produced through Direct Chill casting. Experimental ... -
Coke Impurity Characterisation and Electrochemical Performance of Carbon Anodes for Aluminium Production
(Doctoral theses at NTNU;2019:352, Doctoral thesis, 2019)The aluminium production process uses consumable carbon anodes made from calcined petroleum cokes, recycled anode butts and coal tar pitch. The main ingredient is the coke, a side product from the petroleum refining industry. ... -
Assessment of feature engineering and long short-term memory for structure loss identification from process data in monocrystalline silicon growth by the Czochralski method
(Research report, 2019)Structure loss impairs the quality of monocrystalline ingots and represents a major productivity loss for crystal growers. If structure loss could be predicted in advance it could help reduce the lost production time or ... -
Nucleation and Growth of High Performance Multicrystalline Silicon (HPMC-Si) in Si3N4 and SiC Coated Crucibles
(Master thesis, 2019)The silicon material for photovoltaic (PV) industry demands high quality. It is known that dislocation clusters are among the foremost limiting effects on the minority carrier lifetime, and thus the PV efficiency. The ... -
Thermogravimetric Analysis of Thermal Insulating Materials Exposed to Sodium Vapor
(Journal article; Peer reviewed, 2019)The bottom thermal insulating layer in aluminum electrolysis cells is normally well protected from chemical attacks by a refractory layer. However, autopsies of spent cathode lining have shown that sodium vapor may reach ... -
Medieval copper mining and smelting in Central Norway
(Chapter, 2019)In Norway, copper was used in alloys from the Bronze Age onwards, but domestic copper mining and smelting has not been recognized before the Late Middle Ages. A copper smelter found in Meråker Municipality in Central Norway ... -
Dynamic Modelling of Heat and Mass Transfer in the Silicon Arc Furnace
(Master thesis, 2019)Grunstoffet silisium er av stor betydning for det moderne samfunn. Selv om silisium er det vanligtse grunnstoffet i jordskorpen etter oksygen, så finnes ikke silisium i sin elementære form i naturen. Silisium kan produseres ... -
Comparison of Surface Tension Models for the Volume of Fluid Method
(Journal article; Peer reviewed, 2019)With the increasing use of Computational Fluid Dynamics to investigate multiphase flow scenarios, modelling surface tension effects has been a topic of active research. A well known associated problem is the generation of ... -
Optimizing multiple beam interferometry in the surface forces apparatus: Novel optics, reflection mode modeling, metal layer thicknesses, birefringence, and rotation of anisotropic layers
(Journal article; Peer reviewed, 2019)Multiple beam interferometry (MBI) evolved as a powerful tool for the simultaneous evaluation of thin film thicknesses and refractive indices in Surface Forces Apparatus (SFA) measurements. However, analysis has relied on ... -
Strålingspåvirkning på optiske element for en Hyperspektral CubeSat-nyttelast
(Bachelor thesis, 2019)NTNU SmallSat Lab har som mål å bygge en billig og høy ytelse hyperspectral-kamera for å oppdage alge og plankton signaturer fra rommet. Kameraet er laget av optiske COTS komponenter. Det er imidlertid velkjent innen romfart ... -
Determining fundamental properties from diffraction: Electric field induced strain and piezoelectric coefficient
(Peer reviewed; Journal article, 2019)Neutron powder diffraction was used in operando to determine the macroscopic strain and piezoelectric coefficient as a function of applied electric field in a technically relevant actuator material. We were able to ... -
Computational Alloy Design of AA6xxx Extrusions
(Master thesis, 2019)I denne oppgaven har en rekke beregningsmodeller blitt brukt for å simulere hele prosessen for ekstrudert aluminium og senere utherding. Den proprietære programvaren \pro{} knytter sammen flere modeller. I denne oppgaven ... -
Removal and recovery of indium from ITO coated glass and scraps using molten salt electrolysis
(Peer reviewed; Journal article, 2019)Indium is an important strategic resource due to the scarcity for the metal. In the present study, molten salt electrolysis is used to reduce indium from ITO coated glass and scraps in order to seek a new way to recycle ...