Blar i Institutt for materialteknologi på tittel
Viser treff 1575-1594 av 2503
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Nucleation of Primary Mg2Si in Al-Mg-Si Alloys
(Master thesis, 2014)Al-Mg2Si Metal Matrix Composites have the potential to replace the frequently used near- and hyper-eutectic Al-Si alloys. In the as-cast condition, these alloys can contain coarse dendritic primary Mg2Si particles which ... -
Nucleation of SiO2-CaO-Al2O3 Slag in Oxidative Ladle Refining of Metallurgical Grade Silicon
(Peer reviewed; Journal article, 2021)Oxidative ladle refining (OLR) is the most used refining method in industrial production of metallurgical grade silicon. OLR is performed by purging the liquid alloy with oxygen-enhanced air at 1823 K to 1873 K, reacting ... -
Numerical Modeling of Hydrogen Fluoride Adsorption
(Master thesis, 2021)Produksjonsmengden av aluminium øker for hvert år. For å møte etterspørselen, øker aluminiumsverk spenningen i elektrolysecellene for å øke produksjonen, men også den økonomiske gevinsten. En bi-effekt av dette er økt ... -
Numerical modelling and photo-electrochemical characterization of dye sensitized solar cells
(Master thesis, 2017)Current-potential characteristics were recorded, and intensity modulated photocurrent spectroscopy (IMPS), intensity modulated photovoltage spectroscopy (IMVS), and electrochemical impedance spectroscopy (EIS) was performed ... -
Numerical modelling of a Czochralski furnace with active cooling jacket - Optimization of quality and througput
(Master thesis, 2015)In the single crystal silicon Czochlarski process, pull rate has a great impact on its production. More and more people put their eyes on optimizing the structure of Cz furnace to increase the pull rate, but experiments ... -
Numerical simulation of bubble growth in a supersaturated solution
(Journal article; Peer reviewed, 2020)In this paper, a Volume of Fluid (VOF) based approach to simulate the growth of a pre-existing bubble in a supersaturated solution is developed and implemented in OpenFOAMⓇ. The model incorporates the Compressive Continuous ... -
Numerical simulation of continuum scale electrochemical hydrogen bubble evolution
(Peer reviewed; Journal article, 2021)One of the important aspects in improving the efficiency of electrochemical processes, such as water electrolysis, is the efficient removal of bubbles which evolve from the electrodes. Numerical modelling based on Computational ... -
Numerisk modellering av tilbakeglødingsoppførsel i utvalgte aluminiumslegeringer
(Master thesis, 2011)I denne rapporten er det tatt for seg modellering av mykningsreaksjoner etter deformasjon for AA1200- og AA3103-legeringer. Grunnleggende teori rundt mykningsreaksjonene for disse legeringene er presentert. Det er hentet ... -
Observation of cation-specific critical behavior at the improper ferroelectric phase transition in Gd2(MoO4)3
(Journal article; Peer reviewed, 2022) -
Observation of Electric-Field-Induced Structural Dislocations in a Ferroelectric Oxide
(Peer reviewed; Journal article, 2021)Dislocations are 1D topological defects with emergent electronic properties. Their low dimensionality and unique properties make them excellent candidates for innovative device concepts, ranging from dislocation-based ... -
Observation of uncompensated bound charges at improper ferroelectric domain walls
(Journal article; Peer reviewed, 2019)Low-temperature electrostatic force microscopy (EFM) is used to probe unconventional domain walls in the improper ferroelectric semiconductor Er0.99Ca0.01MnO3 down to cryogenic temperatures. The low-temperature EFM maps ... -
Observation of Unconventional Dynamics of Domain Walls in Uniaxial Ferroelectric Lead Germanate
(Peer reviewed; Journal article, 2020)Application of scanning probe microscopy techniques such as piezoresponse force microscopy (PFM) opens the possibility to re‐visit the ferroelectrics previously studied by the macroscopic electrical testing methods and ... -
Octahedral coupling in (111)- and (001)-oriented La0.7Sr0.3MnO3/SrTiO3 heterostructures
(Journal article; Peer reviewed, 2018)Rotations and distortions of oxygen octahedra in perovskites play a key role in determining their functional properties. Here, we investigate how octahedral rotations can couple from one material to another in La2/3Sr1/3 ... -
Octoxy capped Si nanoparticles synthesized by homogeneous reduction of SiCl4 with crown ether alkalide
(Journal article; Peer reviewed, 2014)Blue-green luminescent octoxy capped Si nanoparticles were synthesized via homogeneous reduction of SiCl4 with the crown ether alkalide K+(15-crown-5)2K− in tetrahydrofuran. The Si nanoparticles were characterized with ... -
On design, modelling, and analysis of a 10‐MW medium‐speed drivetrain for offshore wind turbines
(Peer reviewed; Journal article, 2020)Utformingen av et drivverk med middels hastighet for 10-MW referanse offshore vindturbin for Danmarks Tekniske Universitet (DTU). Det foreslås en fire-punkts drivlinjeoppsett som er utstyrt med en girkasse med to planetrinn ... -
On Gaseous Emissions During Alumina Feeding
(Peer reviewed; Journal article, 2021)Aluminium electrolysis involves feeding of alumina into a cryolite-based bath. Water originating from alumina as well as from air reacts with fluorides and results in HF evolution. Untreated HF gas is a significant ... -
On intermetallic phases formed during interdiffusion between aluminium alloys and stainless steel
(Peer reviewed; Journal article, 2022)One of the major challenges in welding of aluminium (Al) alloys and steels is the growth of brittle intermetallic phases, which depends on the thermomechanical processing history and the alloying elements. This work focuses ... -
On modelling electrochemical gas evolution using the volume of fluid method
(Chapter, 2020)In this work we describe the various building block relevant in simulating electrochemical gas evolution using Volume of Fluid (VOF) method. These building blocks are implemented in the VOF solver available in OpenFOAM® ... -
On sharp surface force model: effect of sharpening coefficient
(Journal article, 2020)Amongst the multitude of approaches available in literature to reduce spurious velocities in Volume of Fluid approach, the Sharp Surface Force (SSF) model is increasingly being used due to its relative ease to implement. ... -
On the ballistic perforation resistance of additive manufactured AlSi10Mg aluminium plates
(Journal article; Peer reviewed, 2019)Materials and structures made through additive manufacturing (AM) have received a lot of attention lately due to their flexibility and ability to customize structural components of complex geometry. One range of application ...