Blar i Institutt for materialteknologi på utgivelsesdato
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Electrochemical processes in the AlCl3-urea ionic liquid analogue
(Master thesis, 2019)Hvert år produseres det nesten 70 millioner tonn aluminium på verdensbasis som blir anvendt i ulike industrier, blant annet transport-, elektronikk- og emballasjeindustrien. Materialet er høyt etterspurt grunnet sine ... -
Alkaline manganese electrochemistry studied by in situ and operando spectropscopic methods - metal dissolution, oxide formation and oxygen evolution
(Journal article; Peer reviewed, 2019)Manganese-based systems are considered as candidate electrocatalysts for the electrochemical oxygen evolution reaction (OER), because of their abundance in biochemical oxygen producing catalyst systems. In this work, the ... -
Dielectric and piezoelectric properties of barium calcium zirconate titanate ceramics
(Master thesis, 2019)Det ferroelektriske systemet barium calcium zirconate titanate er av høy interesse for bruk i industrielle applikasjoner på grunn av eksepsjonelt høye piezoelektriske koeffisienter. Videre så utgjør det et interessant ... -
IrNix Core-Shell Nanocatalysts for the Oxygen Evolution Reaction
(Master thesis, 2019)Dette masterprosjektet undersøker flere aspekter av iridium baserte elektro-\\katalysatorer for okygenutviklingsreaksjonen (OER), i proton bytte membraner (PEM) for vannelektrolyse. Med dagens økende fokus på grønn energi, ... -
Unconventional Continuous Structural Disorder at the Order-Disorder Phase Transition in the Hexagonal Manganites
(Journal article; Peer reviewed, 2019)The improper ferroelectricity in YMnO3 and other related multiferroic hexagonal manganites is known to cause topologically protected ferroelectric domains that give rise to rich and diverse physical phenomena. The local ... -
Dynamic electrochemical impedance study of methanol oxidation at Pt at elevated temperatures
(Journal article; Peer reviewed, 2019)The methanol oxidation reaction (MOR) is studied at temperatures up to 140 °C by a combination of cyclic voltammetry, chronoamperometry, and dynamic electrochemical impedance spectroscopy (dEIS). A mechanistic analysis of ... -
Thickness dependent uniaxial magnetic anisotropy due to step-edges in (1 1 1)-oriented La0.7Sr0.3MnO3 thin films
(Journal article; Peer reviewed, 2019)The magnetic anisotropy of films of La0.7Sr0.3MnO3 grown on vicinal (1 1 1)-oriented SrTiO3 substrates are investigated. For temperatures above the tetragonal – cubic structural phase transition temperature of the substrate, ... -
Bulk Metallic Glasses: Deformation and Design
(Doctoral theses at NTNU;2019:43, Doctoral thesis, 2019)Bulk metallic glasses are a group of alloys with amorphous atomic structure. When these alloys cool sufficiently fast, the atoms will “freeze” in the chaotic structure of the melt, rather than form crystals like most metals. ... -
In-situ observations of dislocation recovery and low angle boundary formation in deformed aluminium
(Journal article; Peer reviewed, 2019)An experimental study of the recovery of dislocations and low angle boundary formation in aluminium is presented. By combining in-situ annealing with orientation mapping in the transmission electron microscope, maps of ... -
The Effect of Exposure to Elevated Temperature on the Mechanical Properties of age hardenable AlMgSiCu-Alloys
(Master thesis, 2019)Med et økt behov for lette, sterke materialer for bilindustrien, kommer også et økt behov for kunnskap om de mekaniske egenskapene til disse materialene. Det er godt kjent at utherdbare aluminiumlegeringer har høy styrke ... -
Biocompatibility of (Ba,Ca)(Zr,Ti)O3 piezoelectric ceramics for bone replacement materials
(Journal article; Peer reviewed, 2019)Total joint replacement implants are generally designed to physically mimic the biological environment to ensure compatibility with the host tissue. However, implant instability exposes patients to long recovery periods, ... -
Korrosjon i klatreparksystemer
(Bachelor thesis, 2019)Hensikten med denne oppgaven var å undersøke hvordan korrosjon kan forekomme og påvirke bestemte elementer i en klatrepark. Spesielt var det fokusert på easybraketter og gjengestenger og på hvilke korrosjonsformer som kan ... -
Bauschinger effect modelled by yield surface distortions
(Journal article; Peer reviewed, 2019)A model for distorting the yield surface by flattening the part in the reverse of the loading direction, is suggested. As the basis for the distortion, the model applies a pair of second-order back-stress tensors of similar ... -
Silicon Nanoparticle Ensembles for Lithium-Ion Batteries Elucidated by Small-Angle Neutron Scattering
(Journal article; Peer reviewed, 2019)Silicon in the form of nanoparticles has attracted significant interest in the field of lithium-ion batteries due to the enormous capability of lithium intake. In the present work we demonstrate the characterization of ... -
Investigation of pinholes in Czochralski silicon ingots in relation to structure loss
(Journal article; Peer reviewed, 2019)In the production of monocrystalline silicon by the Czochralski process, structure loss frequently reduces yield and increases production time. Structure loss means the transition from monocrystalline to multicrystalline ... -
Methods of Oxidation Inhibition for Al-Mg Alloys
(Doctoral theses at NTNU;2019:29, Doctoral thesis, 2019)The oxidation of aluminum will occur at any notable oxygen partial pressure. This oxidation can be favorable as it forms a protective layer on the metal surface which prevents further oxidation. However, the addition of a ... -
FIB lift-out of conducting ferroelectric domain walls in hexagonal manganites
(Journal article; Peer reviewed, 2019)A focused ion beam (FIB) methodology is developed to lift out suitable specimens containing charged domain walls in improper ferroelectric ErMnO3. The FIB procedure allows for extracting domain wall sections with well-defined ... -
Iron separation from bauxite through smelting reduction
(Master thesis, 2019)containing slag. Sammendrag Alumina produksjon domineres kommersielt av Bayer-prosessen som også produserer rødslam. Dette kan ikke forbrukes og foråsaker store skader på miljøet. Et bærekraftig alternativ for bearbeiding ... -
Constructing a Flow Loop for Laboratory Testing of Single Pipe, Batch Based Transport of Production Chemicals
(Bachelor thesis, 2019)Hensikten med denne oppgaven er å konstruere en strømningssløyfe, designet for å videre utforske mulighetene for injeksjon av kjemikalier subsea gjennom én rørledning. Strømningssløyfen er konstruert på verkstedet på SINTEFs ... -
Effects of CO2 cover gas and yttrium additions on the oxidation of AlMg alloys
(Chapter, 2019)AlMg alloys are known to suffer from problematic oxidation that can result in significant dross formation and loss of Mg from the melt. Historically, beryllium has been used to minimize the oxidation as it forms a protective ...