Browsing Institutt for materialteknologi by Issue Date
Now showing items 141-160 of 2534
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Case Hardening of Hardox 450 Steel for Increased Ballistic Strength
(Master thesis, 2011)AbstractSteel alloys are the material that is most used in protective constructions today. The reason is the overall good properties of steels, with its high strength and hardness, high ductility, high formability and ... -
B diffusion in slag during slag refining for solar grade silicon
(Master thesis, 2011)Mass transfer rate of B during slag refining has been investigated in the resistance tube furnace at temperature 1600 ºC and the mass transfer coefficients of B have been determined. The values of mass transfer coefficients ... -
Particulate emissions from electrolysis cells
(Journal article; Peer reviewed, 2011)In the dry cleaning of the exhaust gas from the aluminium cells impurities are accumulated in the finer fractions of secondary alumina from the dry scrubbers. The present work describes new methods for the determination ... -
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 ... -
In situ strekkforsøk med EBSD karakterisering av HSLA-stål ved romtemperatur og -60 °C
(Master thesis, 2011)Denne oppgaven har tatt for seg et 420 MPa HSLA stål. Stålet ble sveisesimulertfor å oppnå mikrostruktur tilsvarende grovkornet og interkritisk grovkornetHAZ. Interkritisk grovkornet HAZ ble oppnådd ved en tosyklus ... -
High Temperature Cathodic Disbondin of Organic Coatings on Submerged Steel Structures
(Master thesis, 2011)There are currently no standard test methods for testing the cathodic disbonding properties of organic coatings at temperatures above 100 C. There are several subsea oil and gas reservoirs with high temperatures, some as ... -
Recycling of Aluminum Scrap by Severe Plastic Deformation
(Journal article; Peer reviewed, 2011)The production of primary aluminum is an energy costly process. With the global warming being of concern, the secondary aluminum stream is becoming an even more important component of aluminum production and is attractive ... -
Characterization of precipitates at maximum hardness and overaged conditions in Al-Mg-Si alloys
(Master thesis, 2011)A study of the influence of artificial ageing temperature on the precipitation behaviour in three distinct direct chill casted and extruded Al-Mg-Si alloys has been carried out. The total amount of alloying elements is ... -
Experimental Studies of Cold Roll Bonded Aluminum Alloys
(Master thesis, 2011)This master s thesis is based on experimental studies of the parameters influencing cold roll bonding (CRB) of the aluminum alloys AA1200 and AA3103,in the work hardened and annealed condition. The effect on the bond ... -
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. ... -
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 ... -
Optimization and Modeling of electrode structure and composition for novel PEM water electrolyser MEAs
(Master thesis, 2011)Lack of commercial electrocatalysts and membrane electrode assemblies (MEA) which are efficient, durable and reasonably priced for proton exchange membrane water electrolysis was the inspiration of the current project.A ... -
Depolarized gas anodes for electrowinning in molten salts
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:130, Doctoral thesis, 2011) -
Oxidation of silicon in aqueous media
(Master thesis, 2011)Silicon is used in the production of various ceramic products. As the solar industry is advancing, the need for reusable crucibles for the casting of solar grade silicon has arisen. One idea is to produce silicon nitride ... -
Multiferroic, Magnetoelectric Nanoparticles: Lanthanum-substituted Bismuth Ferrite
(Master thesis, 2011)In this report, 10 at% lanthanum was introduced to the perovskite structure of bismuth ferrite at the expense of bismuth through a modified Pechini wet chemical method. Green body powders were calcined at several temperatures, ... -
The susceptibility of grade 70 anchor chain steel to HISC
(Master thesis, 2011)Due to recent fractures in grade 70 anchor chains in the fish farming industry, chain supplier Erling Haug AS has initiated an examination of a sandblasted anchor they sell today. The sandblasted anchor chain is of the ... -
Grain Refinement of High Alloyed Steel With Cerium Addition
(Master thesis, 2011)This master thesis has the objective to improve the mechanical properties of Super Duplex steel by adding Elkem Grain Refiner (EGR). EGR is commercial grain refiner where the active element is cerium. Cerium is a strong ... -
Electrical Characterization of Amorphous Silicon Nitride Passivation Layers for Crystalline Silicon Solar Cells
(Master thesis, 2011)High quality surface passivation is important for the reduction of recombination losses in solar cells. In this work, the passivation properties of amorphous hydrogenated silicon nitride for crystalline silicon solar cells ... -
Experimental Investigations and Phase Relations in the Liquid FeTiO3-Ti2O3-TiO2 Slag System
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:105, Doctoral thesis, 2011) -
A Finite-Size Study on Samarium-Substituted Bismuth Ferrite: Multiferroic and Lead-Free Piezoelectric Materials
(Master thesis, 2011)Multiferroic materials combine two or more ferroic orders such as ferroelectricity, ferromagnetism and ferroelasticity. They have a great interest for the development of the next generations of digital electronic memory ...