Blar i Institutt for materialteknologi på tittel
Viser treff 1840-1859 av 2562
-
Prereduction Behavior of Manganese Ores With Solid Carbon and in CO/CO<inf>2</inf> Gas Atmosphere
(Peer reviewed; Journal article, 2022)The prereduction reactions in the submerged arc furnace (SAF) are highly decisive of the total carbon, and energy consumption of the ferromanganese process. Therefore, understanding the dependency of prereduction behavior ... -
Prereduction of Comilog- and Nchwaning ore
(Doctoral theses at NTNU;2020:415, Doctoral thesis, 2020)Manganese ferroalloys are mainly used as an alloying element in steel production and are normally produced in submerged arc furnaces. Raw materials such as manganese ore, metallurgical coke and fluxes (and quartz for SiMn) ... -
Prereduction of Nchwaning Ore in CO/CO2/H2 Gas Mixtures
(Peer reviewed; Journal article, 2021)Prereduction of Nchwaning manganese ore was investigated by isothermal reduction between 600 and 800 °C to optimize the conditions for industrial pretreatment of manganese ores. Experiments were conducted in CO/CO2 gas ... -
Press Form Hardening of Aluminium - The influence of hot forming, quench interruption and direct artificial aging on the mechanical properties of AA6082
(Master thesis, 2018)The automotive industry is in need of new lightweight solutions to meet stricter regulations regarding reduction in greenhouse gas emissions. Replacing steel components with age-hardenable high-strength aluminium alloys ... -
Press Form Hardening of Aluminium Alloys 7021 and 6082. A Feasibility Study.
(Master thesis, 2016)Aluminium alloys 6082.25 and 7021.50 were evaluated and compared as potential base materials for processing by press form hardening. Both extruded profiles and rolled sheets were assessed, however the rolled 7021 material ... -
Pressure Control of Nonferroelastic Ferroelectric Domains in ErMnO<inf>3</inf>
(Journal article; Peer reviewed, 2023)Mechanical pressure controls the structural, electric, and magnetic order in solid-state systems, allowing tailoring of their physical properties. A well-established example is ferroelastic ferroelectrics, where the coupling ... -
Pressure drop in charge mixture in silicon production
(Master thesis, 2020)Lavere energiforbruk, en mer miljøvennlig produksjon og høyere silisium utbytte er viktige mål i silisium industrien. For å oppnå disse målene kreves det at prosessene i ovnen er stabile. Flere operasjonelle problemer har ... -
Pretreatment of manganese ores in CO/CO2/H2 atmospheres
(Doctoral theses at NTNU;2022:401, Doctoral thesis, 2022)During industrial production of manganese ferroalloys, the manganese raw materials are prereduced in the low temperature zone of the submerged arc furnace (SAF). The endothermic Boudouard reaction (CO2 + C = 2CO) consumes ... -
Pretreatment with a β-cyclodextrin - corrosion inhibitor complex stops an initiated corrosion process on zinc
(Journal article; Peer reviewed, 2018)Metal pretreatment is typically the first step in a reliable corrosion protection system. This work explores the incorporation of complexes between the cyclic oligosaccharide β-cyclodextrin (β-CD) and the molecular organic ... -
Primary Production of Aluminium and Its Alloys in Molten Salts with Oxygen Evolving Anodes: Overview
(Peer reviewed; Journal article, 2022)Due to environmental and economic concerns, carbon-free aluminium production has been an ultimate target for aluminium industries. For the last few decades, a considerable amount of research has been conducted to find a ... -
Probing heat generation during tensile plastic deformation of a bulk metallic glass at cryogenic temperature
(Journal article; Peer reviewed, 2018)Despite significant research efforts, the deformation and failure mechanisms of metallic glasses remain not well understood. In the absence of periodic structure, these materials typically deform in highly localized, thin ... -
Probing the electronic properties of p-doped gallium arsenide nanowires
(Master thesis, 2014)Probing the electronic properties of nm-scaled object is a challenge but is required for doping optimalization and using the nm-scaled objects as building blocks in future devices. In the present study, electron beam induced ... -
Process Phenomena in Furnaces Producing Ferrosilicon Alloys
(Doctoral theses at NTNU;2024:199, Doctoral thesis, 2024)The production of ferrosilicon alloys is carried out in electric arc furnaces through carbothermic reduction. The reduction process involves the use of quartz, iron containing raw materials, and carbon reductants which are ... -
Process- and Alloy Development of Recyclable Aluminium Alloys: Recovery and Recrystallization Behavior of a Selection of AlMn-model Alloys
(Master thesis, 2011)A study of the effect of various amounts of manganese in solid solution on the recovery and recrystallization behavior of an AlMn-alloy, for different annealing conditions after different degrees of deformation (cold ... -
Processing and Characterisation of Diatoms for Light Harvesting Materials in Solar Cells
(Master thesis, 2011)By applying a texture to the front surface of solar cells, less light may be reflected and the incoming light may be given a longer path length inside the solar cell causing a better light absorbance for the solar cell. ... -
Processing and indexing of electron backscatter patterns using open-source software
(Peer reviewed; Journal article, 2020)A new method to increase the signal-to-noise ratio S/N of electron backscatter patterns (EBSPs) based upon principal component analysis (PCA) is presented. The PCA denoising method is applied to ten scans of EBSPs from the ... -
Processing and Properties of Direct Reduced Iron Pellets Containing Material for Control of Steel Structure
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:42, Doctoral thesis, 2010)The thesis work was carried out at the Department of Materials Science and Engineering in Norwegian University of Science and Technology (NTNU) and in SINTEF. It is a part of a SINTEF /NTNU project called Dispersoids in ... -
Processing of high performing composite cathodes for protonic ceramic fuel cells by exsolution
(Journal article; Peer reviewed, 2019)La0.5Ba0.5CoO3-δ-BaZrO3 (LB-BZ)-based composite materials were prepared by a modified Pechini sol-gel method combined with exsolution. Two different LB-BZ composites were prepared through two alternative thermal treatments ... -
Processing of thin film ceramic membranes for oxygen separation
(Journal article; Peer reviewed, 2012)Processing of dense and thin ceramic membrane layers for high temperature selective oxygen separation is addressed in this study. Mixed oxygen-ionic and electronic conducting perovskite oxide system based on La0.2Sr0.8Fe ... -
Product formation during discharge: a combined modelling and experimental study for Li–O2 cathodes in LiTFSI/DMSO and LiTFSI/TEGDME electrolytes
(Peer reviewed; Journal article, 2021)Li–air or Li–O2 batteries are a promising energy storage technology due to the potentially high energy density. However, significant challenges related to reversible charge/discharge of these cells need to be solved. The ...