Blar i Institutt for materialteknologi på tittel
Viser treff 2342-2361 av 2563
-
The effects of impurities on the properties of Cz-grown silicon for solar cells
(Doctoral thesis at NTNU;2015:61, Doctoral thesis, 2015)The crystalline silicon solar cell has been dominating the PV market since it was introduced in the 1950´s. About 90% of solar modules currently installed are based on crystalline silicon, with cost-effective and high ... -
The effects of press cooling and artificial aging on fatigue and ductility of an aluminium alloy
(Master thesis, 2020)Den moderne bilindustrien krever nye løsninger når det gjelder å produsere lette kjøretøyer for å redusere utslipp og øke drivstoffeffektiviteten. Utherdbare aluminiumslegeringer er attraktive erstatninger for stål for å ... -
The effects of quench rate and pre-deformation on precipitation hardening in Al–Mg–Si alloys with different Cu amounts
(Journal article, 2014)The effects of quench rate after solution heat treatment in combination with 1% pre-deformation on precipitation hardening in three Al–Mg–Si alloys have been investigated by transmission electron microscopy and hardness ... -
The Future of Aluminium Recycling: Behaviour of Cu, Zr , Ga and Ag in Liquid Aluminium Solution During Recycling
(Bachelor thesis, 2022)Akkumuleringen av legeringselementer i aluminium kan føre til store utfordringer for resirkuleringen av metallet etter bruk, grunnet at renheten til aluminium minker med introduksjonen av fremmede elementer. Noen elementer ... -
The influence of Ag+, Zn2+ and Cu2+ exchanged zeolite on antimicrobial and long term in vitro stability of medical grade polyether polyurethane
(Journal article; Peer reviewed, 2011)This study aims to investigate the limitations and applicability of different ion exchanged zeolites as antimicrobial additive in thermoplastic polyether type polyurethanes. These composites were designed to improve the ... -
The Influence of Catalyst Layer Thickness on the Performance and Degradation of PEM Fuel Cell Cathodes with Constant Catalyst Loading
(Journal article, 2017)Three catalytic layers containing Pt nanoparticles supported on high surface area carbon of different Pt loading but with the same total amount of platinum and therefore of different thickness were employed as cathode ... -
The Influence of Constituent Particles on Compression Properties and Fracture Initiation in Al Alloys
(Master thesis, 2013)In the present work an AlMgSi alloy, with a small amount of Fe has been investigated. The objective was to study how the thermomechanical processing influences the mechanical properties in compression, dependent on grain ... -
The influence of graphitization on the thermal conductivity of catalyst layers and temperature gradients in proton exchange membrane fuel cells
(Journal article; Peer reviewed, 2018)As the proton exchange membrane fuel cell (PEMFC) has improved its performance and power density, the efficiency has remained unchanged. With around half the reaction enthalpy released as heat, thermal gradients grow. To ... -
The influence of microchemistry on the softening behaviour of two cold-rolled Al-Mn-Fe-Si alloys
(Journal article, 2014)The influence of microchemistry on the softening behaviour of two cold-rolled Al–Mn–Fe–Si alloys with different initial amounts of Mn (0.4 and 1.0 wt%) is studied. In addition to their as-cast conditions, the supersaturated ... -
The influence of Mn, Fe and Si on the work hardening of aluminum alloys
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:16, Doctoral thesis, 2013)The relationship between the processing, the structure and the properties is a key issue of materials science research. The improvement of the properties and optimization of the process always requires a better understanding ... -
The Influence of Ni and V Trace Elements on the High Temperature Tensile Properties of A356 Aluminium Foundry Alloy
(Master thesis, 2014)The Objective of the present study is to evaluate the effect of Ni and V trace elements on the High Temperature Tensile properties of A356 unmodified foudry alloy.Hot Tensile Tests were performed. Further microstructural ... -
The Influence of Polarization on the Wetting of Anodes in the Hall-Héroult Process
(Master thesis, 2016)Improvements in the Hall Héroult process for aluminium electrolysis has lead to a reduction in energy consumption from 20-25 kWh/kg Al 70 years ago, down to around 13-14 kWh/kg Al on average today. In order to further ... -
The influence of processing conditions on microchemistry and the softening behavior of cold rolled Al-Mn-Fe-Si alloys
(Journal article; Peer reviewed, 2016)Using different homogenization treatments, different initial microchemistry conditions in terms of solid solution levels of Mn, and number densities and sizes of constituents and dispersoids were achieved in an Al-Mn-Fe-Si ... -
The influence of silicon in EN AW 6082 alloys on the bond strength in cold pressure welding
(Journal article; Peer reviewed, 2019)Metallurgical joining of steel and aluminum has become a field of interest in research in the last years, as it will allow the production of load adapted lightweight components in the future. The production process of cold ... -
The Influence of Sulfur Content on the Carbothermal Reduction of SiMn Slag
(Journal article; Peer reviewed, 2018)This article examines the influence of sulfur content on the carbothermal reduction of MnO and SiO2 in SiMn slag by carbon black. The sulfur content in the synthetic slag is varied from 0 to 1.0 wt pct. Reduction experiments ... -
The Influence of Transient Change in Strain Rate on Subgrain Size During Deformation by Torsion of AA6063
(Master thesis, 2016)During hot extrusion a extrusion billet s cross section is reduced, altering the metals micro- structure. As the billet is passing through the extrusion die the strain rate and temperature increases, resulting in a with a ... -
The interaction between vacancies and twin walls, junctions, and kinks, and their mechanical properties in ferroelastic materials
(Journal article; Peer reviewed, 2019)Vacancies strongly interact with twin boundaries and often change dramatically the properties of the ferroelastic material. However, the understanding of this behavior at an atomic-level is still deficient. Here we study ... -
The IrO2-Ta2O5 Coated Titanium Anode for Oxygen Evolution Reaction in Sulfate Solution
(Doctoral theses at NTNU;2018:320, Doctoral thesis, 2018)Titanium substrates coated with a conductive layer of metal oxides are well known gas evolving electrodes in the metal electrowinning industry, so-called dimensionally stable anodes (DSAs). DSA electrodes display better ... -
The Kinetic Gas Theory of Mie Fluids
(Master thesis, 2022)Termisk diffusjon er et facinerende fenomen med mange mulige, fremtidige anvendelsesområder. Fenomenet observeres i blandinger som utsettes for en termisk gradient, hvor denne gradienten kan drive en massefluks. Det ble ... -
The Kinetics of Boron Transfer in Slag Refining of Silicon
(Journal article; Peer reviewed, 2012)Slag refining is one of the few metallurgical methods for efficient removal of boron from silicon. In industrial slag refining for production of silicon for photovoltaic applications, the relationship between the slag ...