Institutt for materialteknologi
Nye registreringer
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The beginning and the end of the aluminium value chain
(Peer reviewed; Journal article, 2020)Metallic aluminium does not naturally occur in nature, and it was largely unknown, virtually a mystery, until 200 years ago. The modern aluminium production using a hydrometallurgical refining process for making alumina ... -
Slow surface diffusion on Cu substrates in Li metal batteries
(Peer reviewed; Journal article, 2021)Dendrite growth on the lithium metal anode still obstructs a widespread commercialization of high energy density lithium metal batteries. In this work, we investigate how the crystal structure of the copper foil current ... -
A Review of Ferroalloy Tapping Models
(Peer reviewed; Journal article, 2021)Tapping is an important furnace operation in the ferroalloy industry and poses a number of complex and coupled challenges of both practical and economical importance. Owing to the hazardous high-temperature conditions ... -
Production Rate of SiO Gas from Industrial Quartz and Silicon
(Peer reviewed; Journal article, 2021)The production rate of SiO gas from industrial quartz and silicon has been investigated by isothermal heat treatment experiments. Mixtures of silicon and different quartz samples have been heated to temperatures ranging ... -
The effect of Equal Channel Angular Pressing on the stress corrosion cracking susceptibility of AZ31 alloy in simulated body fluid
(Peer reviewed; Journal article, 2020)Despite the great potential of Mg and its alloys as material for biodegradable implants, their low resistance to the simultaneous action of corrosion and mechanical stresses in the human body have hampered their use. Stress ... -
Electrodeposition of aluminium containing alloys from molten fluoride electrolytes containing metal oxides
(Peer reviewed; Journal article, 2020)Aluminium is produced by the Hall-Heroult process by electrowinning in a molten fluoride electrolyte with dissolved alumina at ~955oC. Several metallic impurities typically end up in the produced metal due to the fact that ... -
Chemical Potential Differences in the Macroscopic Limit from Fluctuations in Small Systems
(Peer reviewed; Journal article, 2021)We present a new method for computing chemical potential differences of macroscopic systems by sampling fluctuations in small systems. The small system method, presented by Schnell et al. [Schnell et al., J. Phys. Chem. ... -
Silicon purification by acid leaching and slag refining techniques
(Doctoral theses at NTNU;2021:117, Doctoral thesis, 2021)Solar energy has become the most popular and fastest-growing renewable energy resource worldwide. However, it still requires the current solar-grade silicon (SoG-Si, purity 99.9999%) production with a larger manufacturing ... -
Synthesis and Characterization of 12CaO·7Al2O3 Slags: The Effects of Impurities and Atmospheres on the Phase Relations
(Journal article; Peer reviewed, 2020)Synthesis of crystalline slags of 12CaO·7Al2O3 phase from the corresponding melt compositions in different atmospheric conditions and different purities is investigated. Observations using a thermogravimetry coupled with ... -
Hole annihilation vs. induced convection: Breakdown of different contributions to the photocorrosion mechanism of oxide-covered iron
(Peer reviewed; Journal article, 2021)The mechanism behind corrosion rate increase of anodised iron under illumination has been studied by comparing photocurrents with corrosion currents from polarisation curves under controlled convection. Under illumination ... -
Tuning Ni–MoO2 Catalyst–Ionomer and Electrolyte Interaction for Water Electrolyzers with Anion Exchange Membranes
(Peer reviewed; Journal article, 2021)Tailoring catalyst–ionomer and electrolyte interaction is crucial for the development of anion exchange membrane (AEM) water electrolysis. In this work, the interaction of Ni–MoO2 nanosheets with ionomers and electrolyte ... -
Microstructure Evolution and Recrystallization Resistance of a 7055 Alloy Fabricated by Spray Forming Technology and by Conventional Ingot Metallurgy
(Peer reviewed; Journal article, 2020)The effect of different fabricating processes (spray forming and conventional casting) and homogenization treatment on the microstructure of an 7055 alloy was investigated by optical microscopy (OM), scanning electron ... -
Tailoring microstructure and texture of annealed Al-Mn alloy through the variation of homogenization and prior cold deformation strain
(Peer reviewed; Journal article, 2020)The grain structures and crystallographic textures desired for various applications of aluminium alloys are usually modified by recrystallization during annealing. In this study, the interactions between recrystallization ... -
Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO3
(Peer reviewed; Journal article, 2020)Results of switching behavior of the improper ferroelectric LuFeO3 are presented. Using a model set of films prepared under controlled chemical and growth‐rate conditions, it is shown that defects can reduce the quasi‐static ... -
Multi-commodity price risk hedging in the Atlantic salmon farming industry
(Peer reviewed; Journal article, 2021)Cost management has received limited attention in the aquaculture industry due to historically high profit margins. This trend, however, is not likely to continue. This creates a need for knowledge on optimally managing ... -
Construction of three-dimensional MnO2/Ni network as an efficient electrode material for high performance supercapacitors
(Peer reviewed; Journal article, 2020)With the rapid growing interest and the usage of smart electronics devices, a considerable attention has been paid to improve the performance of energy storage devices. Herein, the 3D-MnO2/Ni electrode was fabricated using ... -
Experimental setup for high-temperature in situ studies of crystallization of thin films with atmosphere control
(Peer reviewed; Journal article, 2020)Understanding the crystallization process for chemical solution deposition (CSD) processed thin films is key in designing the fabrication strategy for obtaining high-quality devices. Here, an in situ sample environment is ... -
CO and CO2 Anode Gas Concentration at Lower Current Densities in Cryolite Melt
(Peer reviewed; Journal article, 2020)This work aims to study the CO-CO2 gas composition at low potentials and low current densities in cryolite melt with relatively low alumina content (≤2 wt%). There is a scarcity of data in the literature regarding the low ... -
Inverse modelling of interfacial tension between ferroalloy and slag using openfoam
(Chapter, 2020)The entrainment of molten ferroalloy droplets in slag during tapping operations is strongly related to turbulence and interfacial forces between alloy and slag. Therefore, interfacial phenomena are of great importance for ... -
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® ...
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