Browsing Institutt for materialteknologi by Title
Now showing items 2175-2194 of 2540
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Studying the C-A-S-H composition using advanced data treatment of SEM-EDS hypermaps
(Master thesis, 2023)Kalsium alumina silikat hydrat (C-A-S-H) regnes som hovedproduktet som dannes ved hydratasjon av Portland og Portland kompositt sement og er derfor elementær for styrke og bæreevne for sement. En konvensjonell metode brukt ... -
Styrketapsreduksjon ved sveising av 6082 aluminiumlegeringer
(Master thesis, 2022)Sveising av utfellingsherdede aluminiumlegeringer er forbundet med et betraktelig styrketap i materialet rundt sveiselinjen. Det viktigste herdebidraget i disse legeringene utgjøres av termodynamisk ustabile utfellinger. ... -
Subgrain Growth, Recovery Kinetics and Nucleation of Recrystallization of Cold Deformed Aluminium Alloys
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:330, Doctoral thesis, 2013)Phenomena related to annealing of aluminium alloys are among the least understood in aluminium metallurgy but very important for industrial thermo-mechanical processing i.e. deformation and annealing. Physical models are ... -
Subgrain structures characterized by electron backscatter diffraction (EBSD)
(Journal article; Peer reviewed, 2014)Subgrain structures are frequently characterized by the electron backscatter diffraction (EBSD) method, which is both accurate and provides good statistics. This is essential to better understand the subgrain growth ... -
Sulfide Stress Corrosion Cracking Resistance of Modified ASTM A694 F60 Low Alloy Steel for Subsea Applications
(Master thesis, 2013)The resistance to sulfide stress corrosion cracking (SSC) of modified ASTM A694 F60 low alloy steel, produced by two different manufacturers, was studied by four-point bend-testing. The two materials are named material A ... -
Sulfur and nitrogen-doped graphene quantum dots/PANI nanocomposites for supercapacitors
(Peer reviewed; Journal article, 2021)Sulfur and nitrogen-doped graphene quantum dots/polyaniline (S,N-GQDP) nanocomposites are prepared by a two-step synthesis method. The heteroatoms (sulfur and nitrogen) doped graphene quantum dots (S,N-GQDs) are first ... -
Super-coercive electric field hysteresis in ferroelectric plastic crystal tetramethylammonium bromotrichloroferrate(III)
(Peer reviewed; Journal article, 2020)Ionic plastic crystals are part of an emerging class of hybrid organic–inorganic ferroelectrics. The combination of low dielectric constants (<20), strong piezoelectric coefficients (>100 pC N−1) and low temperature synthesis ... -
Supercritical extraction and microwave activation of wood wastes for enhanced syngas production and generation of fullerene-like soot particles
(Peer reviewed; Journal article, 2020)This work demonstrated that supercritical carbon dioxide extraction is effective as a pre-treatment technology to generate soot particles with the fullerene-like structure and increase syngas yield from extracted residues ... -
Superoxide intermediate in the oxygen reduction on a zinc hydroxide model corrosion product
(Peer reviewed; Journal article, 2022)The inhibition of the electrochemical oxygen reduction reaction (ORR) by zinc corrosion products plays an important role in the corrosion protection of galvanized steel. Hence, the electrocatalytic mechanism of the ORR on ... -
Supported Iridium-Ruthenium Mixed Oxide Catalysts for Oxygen Evolution: Synthesis of Mixed Oxides by the Microwave Polyol Method. Composition Dependency of the Catalytic Activities of Mixed Oxides for the OER in PEM Water Electrolysis
(Master thesis, 2013)In this work the microwave polyol synthesis method have been shown as an advantageous method for producing ATO supported IrO2, RuO2 and iridium-ruthenium mixed oxides, allowing for faster synthesis than the normal polyol ... -
Surface Diffusion of Oxygen Transport Membrane Materials Studied by Grain-Boundary Grooving
(Journal article; Peer reviewed, 2016)Mass transport mechanism responsible for grain-boundary grooving during thermal annealing of polished ceramics of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) and La2NiO4+δ (LN) was revealed by atomic force microscopy. Surface diffusion ... -
Surface passivation properties of HfO2 thin film on n-Type crystalline Si
(Journal article, 2017)Atomic layer deposited hafnium oxide is shown to provide good surface passivation of low resistivity, n-type crystalline Si wafers after a low temperature anneal. The surface passivation is related to a fixed negative ... -
Surface pretreatments and filiform corrosion mechanism of model recycled aluminium alloys
(Doctoral theses at NTNU;2024:224, Doctoral thesis, 2024)Filiform corrosion (FFC) is a type of localized corrosion process that affects metals such as aluminium, magnesium and steel under certain environmental circumstances. FFC often occurs in environments combining marine and ... -
Surface processing and analysis of crystalline silicon solar cell materials
(Doctoral theses at NTNU;2023:251, Doctoral thesis, 2023) -
Surface reactivity and cation non-stoichiometry in BaZr1-xYxO3-δ (x=0-0.2) exposed to CO2 at elevated temperature
(Journal article; Peer reviewed, 2019)The reactivity of BaZr1−xYxO3−δ (x = 0–0.2) ceramics under 1 atm CO2 at 650 °C for up to 1000 h was investigated in order to elucidate possible degradation processes occurring when the material is applied as a proton-conducting ... -
Surface Treatment of Graphite for the Mitigation of Lithium Plating in Fast Charging Lithium-Ion Batteries
(Master thesis, 2022)Grafittanoden har vært det foretrukne valget for bruk i litium-ionbatterier (LIB-er) siden de ble kommersialisert i 1991, på grunn av dens lave kostnad, råmaterialtilgjengelighet, relativt høye energi- og effekttetthet og ... -
Surface treatment of high performance multicrystalline silicon wafers
(Master thesis, 2018)This master thesis investigates the properties of high performance multicrystalline silicon, and the production line of black multicrystalline silicon solar cells with PERC architecture. Possible solutions to achieve ... -
Sustainability in alumina production from bauxite
(Chapter, 2016)Alumina (Al2O3) is the main material used for the aluminum production, which is originated from bauxite ore through hydrothermal processes. Although bauxite conversion to alumina can be done through a few competitive ... -
Sustainable Cathode Production for Lithium-Ion Batteries
(Bachelor thesis, 2021)De siste årene har litiumionebatterier (LIB) inntatt en sentral rolle i energilagring for elektrifiseringen av transportsektoren. Det gjenstår fortsatt omfattende utvikling for at produksjonen skal bli bærekraftig. Det ... -
Sustainable use of Bio-ash from the Biozin Project
(Bachelor thesis, 2023)Biozin Holding AS er et selskap som har som mål å produsere avansert, bærekraftig biodrivstoff ved hjelp av IH2 teknologi. Dette biodrivstoffet lages ved å utnytte skogsrester og biprodukter fra sagbruksindustrien, og i ...