Browsing Institutt for materialteknologi by Document Types "Doctoral thesis"
Now showing items 41-60 of 318
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Characteristics of particulate emissions from aluminium electrolysis cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:314, Doctoral thesis, 2013)Modern sampling and analysis techniques were applied to study the morphology and composition of pot exhaust particles from aluminium smelters. In this study the total spectrum of pot exhaust particles from prebake electrolysis ... -
Characterization of Defects in N-type Cz Silicon for Solar Cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:269, Doctoral thesis, 2012)With increasing attention to high efficiency solar cells in the photovoltaic industry, ntype Cz silicon has become increasingly popular due to its potential for high-end devices. As the metal content in Cz silicon is reduced ... -
Characterization of light induced degradation in crystalline silicon
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:, Doctoral thesis, 2013)Light induced degradation is an unfortunate characteristic of a very commonly used silicon material for solar cells: boron-doped Czochralski silicon. The degradation is attributed to a recombination center that is activated ... -
Characterization of recycle-like Al-Si alloys processed by severe plastic deformation
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:277, Doctoral thesis, 2008)Three aluminium alloys from the Al-Si-Fe system were selected as an object of the present study. The chemistry of the investigated materials, with relatively large additions of iron and silicon, was selected to obtain large ... -
Chromate-free Pre-treatment of Aluminium for Adhesive Bonding
(Dr. ingeniøravhandling; 2003:59, Doctoral thesis, 2003)The increasing use of aluminium in automotive and transport applications is primarily driven by its high strength to weight ratio, enabling substantially improved fuel economy and reduced CO2 emissions when substituted for ... -
Coke Impurity Characterisation and Electrochemical Performance of Carbon Anodes for Aluminium Production
(Doctoral theses at NTNU;2019:352, Doctoral thesis, 2019)The aluminium production process uses consumable carbon anodes made from calcined petroleum cokes, recycled anode butts and coal tar pitch. The main ingredient is the coke, a side product from the petroleum refining industry. ... -
Cold welding of steel and aluminum alloys - Joining processes, intermetallic phases and bond strength
(Doctoral theses at NTNU;2020:16, Doctoral thesis, 2020)Steel and aluminum are two of the most commonly used metals in today’s society and can be found everywhere, in vehicles, buildings, ships, and in most new electronic devices to name a few. Both metals have desirable ... -
Colloidal Synthesis of Ni-based Nanoparticles as Catalysts for Alkaline Water Electrolysis
(Doctoral theses at NTNU;2021:146, Doctoral thesis, 2021) -
A Computational Investigation of Rechargeable Magnesium Batteries and MXenes
(Doctoral theses at NTNU;2021:396, Doctoral thesis, 2021)Rechargeable batteries are playing an ever important role in the transition to a renewable energy based society. As of today, it is the Li-ion battery which dominates the market for high performance batteries in almost all ... -
Condensation of SiO and CO in silicon and ferrosilicon production
(Doctoral theses at NTNU;2021:93, Doctoral thesis, 2021)Kondensasjon av SiO(g) er kombinasjon av to reaksjoner i silisiumprosessen. Den første er interaksjonen mellom SiO(g) og CO(g). Den andre er reaksjonen mellom to SiO(g) molekyler. Disse to reaksjonene foregår i lavtemperatursonen ... -
Continuous glass fibre-polypropylene composites made by melt impregnation
(Doktoravhandlinger ved NTNU, 1503-8181; 2001:55, Doctoral thesis, 2001)In order to obtain best possible continuous glass fibre – polypropylene composites the following requisites should be fulfilled; wetting of the fibres by the melt, good adhesive strength between the fibres and the solid ... -
Cost-effective electrodes for alkaline water electrolysis
(Doctoral theses at NTNU;2022:16, Doctoral thesis, 2022)Green hydrogen production using water electrolysis has potential to be the key component in storing and coupling renewable energy to the transportation and chemical sectors. Alkaline water electrolysis offers a relatively ... -
Coupled Transport in Li-ion Battery Electrolytes
(Doctoral theses at NTNU;2024:187, Doctoral thesis, 2024)Electrolytes are materials that contain mobile charge carriers – ions. The electrolyte in lithium-ion batteries enables the transport of positive Li+ ions in between the electrodes during battery operation. The transport ... -
Cryogenic temperature deformation behaviour of two Al-Mg-Si alloys
(Doctoral theses at NTNU;2017:11, Doctoral thesis, 2017)A comprehensive study was carried out to clarify the effects of cryogenic temperature on mechanical properties and microstructure of two peak-aged Al-Mg-Si profiles, i.e., fully recrystallized AA6060 and fibrous AA6082. ... -
Defect chemistry and ferroelectric domain walls in hexagonal manganites
(Doctoral theses at NTNU;2018:263, Doctoral thesis, 2018)The hexagonal manganites h-RMnO3 (R=Y, In, Sc, Ho-Lu) have been studied the last two decades for their exotic and diverse functional properties. Their large chemical flexibility makes this material class an ideal chemical ... -
Defect-impurity interactions in high performance multicrystalline silicon
(Doctoral theses at NTNU;2018:339, Doctoral thesis, 2018)Defect-impurity interactions in high performance multicrystalline silicon The global average and combined land and ocean surface temperature is steadily rising for the last several decades. About 97% of climate scientists ... -
Deformation and Softening behaviour of commercial AlMn-alloys: Experiments and Modelling
(Dr. ingeniøravhandling, 0809-103X; 2003:82, Doctoral thesis, 2003)A comprehensive study of the softening behaviour of two different non-heat treatable AlMn-alloys has been carried out. These alloys were a laboratory processed and an industrially processed AA3103-alloy. The primary objective ... -
Degradation mechanisms of AA 1350 aluminium alloy conductor strands in air and chloride solution
(Doctoral theses at NTNU;2020:170, Doctoral thesis, 2020)The primary aim of this doctoral thesis is to investigate the degradation mechanisms contributing to the failure of the aluminium strand material (AA 1350) used in steel reinforced aluminium conductors. These conductors ... -
Degradation of Cathode Lining in Hall-Héroult Cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:241, Doctoral thesis, 2010)The aluminium industry is continually facing the problem to lower the energy consumption and to increase the productivity by improving the current high amperage cell technology. Another challenge is to eliminate cell ... -
Degradation of Refractory Lining in Carbon Anode Baking Furnaces
(Doctoral theses at NTNU;2019:340, Doctoral thesis, 2019)Primary aluminium metal is produced by electrochemical reduction of Al2O3 at ~960 ºC, during which large amounts of carbon anodes are consumed. The anodes are thus constituting an important part of the production process. ...