Browsing Institutt for materialteknologi by Issue Date
Now showing items 1121-1140 of 2540
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Development of a mixed-conducting layered oxide for asymmetric oxygen permeable membranes
(Master thesis, 2018)Over 100 million tons of pure oxygen gas are produced each year, making it one of the most used chemicals worldwide. As the conventional production process, cryogenic distillation, is very energy demanding, a new, cheaper ... -
Exploring V2C MXene as a New Cathode Material for Rechargeable Magnesium Batteries
(Master thesis, 2018)Rechargeable magnesium batteries (RMBs) is a promising technology to compete with state-of-the art lithium-ion batteries, due to the possible improvements in safety, abundance of materials and energy density. However, one ... -
Magnetoelectric inversion of domain patterns
(Journal article; Peer reviewed, 2018)The inversion of inhomogeneous physical states has great technological importance; for example, active noise reduction relies on the emission of an inverted sound wave that interferes destructively with the noise of the ... -
Interaction of Eutectic Fe-Si-B Alloy with Graphite Crucibles
(Master thesis, 2018)The work in this thesis was performed as a part of the AMADEUS project. The goal was to experimentally investigate the interaction between eutectic Fe-Si-B alloy and dense graphite crucibles, and the results will be compared ... -
How Slight Solidification Rate Variations within Cast Plate Affect Mechanical Response: A Study on As-Cast A356 Alloy with Cu Addition
(Journal article; Peer reviewed, 2018)The present work investigates a narrow range of secondary dendrite arm spacing (SDAS), in an as-cast A356 alloy with and without copper (Cu) additions. Cu was added to the base A356 alloy melt to reach the target concentration ... -
The Effect of Hydrogen on the Corrosion Resistance of Stainless Steel in Seawater
(Master thesis, 2018)Stainless steels have been used for various applications in the oil and gas industry for a long time due to, among others, their high corrosion resistance. However, immersion in seawater is demanding of the material because ... -
Rationalization of hydrothermal synthesis of NaNbO3 by rapid in situ time-resolved synchrotron X-ray diffraction
(Journal article; Peer reviewed, 2018)In situ monitoring of the formation of crystalline phases during conventional hydrothermal synthesis is experimentally challenging. Here, we report an in situ time-resolved synchrotron X-ray diffraction study during ... -
Gaseous reduction of Mn ores in CO-CO2 atmosphere
(Chapter, 2018)The efficiency in production of manganese ferroalloys is dependent on the gaseous reduction of the higher manganese oxides in the ores used as raw materials. The materials, descending in the furnace, will meet the furnace ... -
Tailoring properties of nanostructured MoO3−x thin films by aqueous solution deposition
(Journal article, 2018)Molybdenum oxide films are required for a large range of optical, electronic and catalytic applications, and optimal film characteristics are similarly broad. Furthermore, the layered crystal structure of MoO3 is suited ... -
The double-edge effect of second-phase particles on the recrystallization behaviour and associated mechanical properties of metallic materials
(Journal article; Peer reviewed, 2018)Most industrial alloys contain a matrix phase and dispersed second-phase particles. Several thermomechanical processing (TMP) steps are usually needed to produce a final product, during which recrystallization and its ... -
In situ exsolution synthesis of composite cathodes for protonic ceramic fuel cells
(Doctoral theses at NTNU;2018:127, Doctoral thesis, 2018)Protonic ceramic fuel cells (PCFCs) have the potential to operate with hydrogen as a fuel in an environmentally friendly manner with no emissions and high electrical efficiency. The lower operation temperature of PCFCs due ... -
Crystal Phase Mapping by Scanning Precession Electron Diffraction and Machine Learning Decomposition
(Journal article; Peer reviewed, 2018)Analyzing the distribution of crystal phases is required to understand nanostructures. Conventional analysis in the transmission electron microscope (TEM) include acquiring dark-field (DF) images for each expected crystal ... -
Modelling of gas-solid reactions - Usage of industrial off-gas for pre-reduction of manganese ores
(Master thesis, 2018)The traditional way of making manganese alloys are by reduction of different manganese oxides, iron oxides and silicon dioxide in a standalone electric furnace. That being said, manganese alloy producing companies may ... -
Impact of thermal history on defects formation in the last solid fraction of Cz silicon ingots
(Journal article; Peer reviewed, 2018)For the first time, the impact of the tail detachment on the quality of the last solid fraction of a Czochralski silicon ingot body is reported. Simulations of the thermal history were performed on CGSim software and showed ... -
The effect of carbon in MnO2 composite electrodes
(Master thesis, 2018)Supercapacitors are promising electrochemical storage devices that might aid in several key technologies such as solar cells, cars, computers and more. In fact, supercapacitors are already used in cars (regenerative braking). ... -
The Effect of Electrolyte Structure on Solid Electrolyte Interphase Formation on Graphitic Anodes for Li-Ion Batteries
(Doctoral theses at NTNU;2018:236, Doctoral thesis, 2018)Li-ion battery performance is substantially dependent on the SEI properties on the graphite anode. This is easily understood if we consider that the performance parameters such as cycle life and temperature window always ... -
High capacity Mg batteries based on surface-controlled electrochemical reactions
(Journal article; Peer reviewed, 2018)Mg batteries are one of several new battery technologies expected to partially substitute lithium-based batteries in the future due to the lower cost and higher safety. However, the development of Mg batteries has been ... -
High-performance La0.5Ba0.5Co1/3Mn1/3Fe1/3O3-δ – BaZr1-zYzO3-δ cathode composites via exsolution mechanism for protonic ceramic fuel cells
(Journal article; Peer reviewed, 2018)A novel exsolution process was used to fabricate complex all-oxide nanocomposite cathodes for protonic ceramic fuel cells (PCFCs). The nanocomposite cathodes with La0.5Ba0.5Co1/3Mn1/3Fe1/3O3-δ – BaZr1-zYzO3-δ nominal ... -
Microstructure Evolution in Super Duplex Stainless Steels Containing σ-Phase Investigated at Low-Temperature Using In Situ SEM/EBSD Tensile Testing
(Journal article; Peer reviewed, 2018)An in situ scanning electron microscope (SEM) study was conducted on a super duplex stainless steel (SDSS) containing 0%, 5% and 10% σ-phase. The material was heat treated at 850 °C for 12 min and 15 min, respectively, to ... -
Experimental characterization and modeling of aluminum alloy AA3103 for complex single and double strain-path changes
(Journal article; Peer reviewed, 2018)The stress-strain behavior of the aluminum alloy AA3103 subjected to single and double strain-path changes (SPCs) is studied experimentally. The experimental program includes compression-tension, tension-tension, rolling-tension ...