Blar i Institutt for materialteknologi på utgivelsesdato
Viser treff 301-320 av 2534
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Long Term Degradation of Polymers: Molecular and Macroscopic Effects
(Master thesis, 2013)Hydrolytic degradation in water at elevated temperatures is one of the most important reasons for failure in polymeric materials in offshore flexible risers. In this thesis the ageing of polyamide 11 (PA11) in deoxygenated ... -
Degradation mechanisms due to wear and corrosion interaction of cutter tools used in Tunnel Boring Mahines.
(Master thesis, 2013)A better understanding of the wear and corrosion mechanisms at work on the steel cutters during tunnel boring is needed to further improve the use of tunnel boring machines in tunnel excavation.In this master thesis several ... -
Stål i beskyttelseskonstruksjoner: Settherdet NVE36 konstruksjonsstål til beskyttelsesformål
(Master thesis, 2013)Tidligere forskning på 12 mm tykke settherdede plater av kvaliteten NVE36 har vist at settherding kan gi en markant forbedring av de ballistiske egenskapene til ferritt-perlittiske stålplater[1]. De ballistiske egenskapene ... -
Fatigue of Welded AA6082 Alloys - Effects of PWHT and Shot Peening
(Master thesis, 2013)Aluminum is a metal widely used in areas such as a construction material in buildings, transportation,oil and gas industry, in packaging for preserving food and drink, electric cables, heatexchangers and many other areas. ... -
Supported Iridium-Ruthenium Mixed Oxide Catalysts for Oxygen Evolution: Synthesis of Mixed Oxides by the Microwave Polyol Method. Composition Dependency of the Catalytic Activities of Mixed Oxides for the OER in PEM Water Electrolysis
(Master thesis, 2013)In this work the microwave polyol synthesis method have been shown as an advantageous method for producing ATO supported IrO2, RuO2 and iridium-ruthenium mixed oxides, allowing for faster synthesis than the normal polyol ... -
The Significance of Gas-Phase Mass Transport in Assessment of k(chem) and D-chem
(Journal article; Peer reviewed, 2013)In this work, the validity of electrical conductivity relaxation (ECR) as a method for the assessment of chemical surface exchange, kchem, and bulk diffusion, Dchem, coefficients is investigated with respect to mass transport ... -
Development of hexagonal manganites for use in oxygen permeable membranes
(Master thesis, 2013)Mixed ionic-electronic conducting membranes can provide a cheaper and more environmental friendly alternative to cryogenic distillation for production of 100 % pure oxygen. However, most of today's state-of-the-art materials ... -
Modelling work hardening of aluminium alloys containing dispersoids
(Journal article; Peer reviewed, 2013)The influence of dispersoids on tensile deformation behaviour has been studied by comparison of aluminium alloys containing different dispersoid densities. It was found that a fine dispersion of non-shearable particles led ... -
A New Nano Insulation Material for Applications in Zero Emission Buildings
(Master thesis, 2013)New materials with extremely low thermal conductivities are interesting because they can have architectonic, technical and possibly economic benefits in buildings. A new nano insulation material (NIM) is under development ... -
Development of high performance lightweight aggregates
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:223, Doctoral thesis, 2013) -
Spraypyrolyse av keramiske oksidmaterialer
(Master thesis, 2013)Denne oppgaven er et studium av effekten av prosessparametere og kjemiske parametere i produksjon av keramiske oksider ved spraypyrolyse. Undersøkelsene har blitt utført ved fremstilling av europiumdopet og ikke-dopet ... -
Lead-free piezoelectric Materials based on Silver Niobate
(Master thesis, 2013)Studies done on base material AgNbO3 reveals that a large polarization, which is comparable to values reported for PZT, occurs under application of a high electric field. Density functional calculations show that solid ... -
Studying light-induced degradation by lifetime decay analysis: Excellent fit to solution of simple second-order rate equation
(Journal article; Peer reviewed, 2013)Twenty different boron-doped Czochralski silicon materials have been analyzed for light-induced degradation. The carrier lifetime degradation was monitored by an automated quasi-steady-state photoconductance setup with an ... -
Sintering behaviour and mechanical properties of porous alumina ceramics
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:316, Doctoral thesis, 2013)Alumina is a commercial ceramic material with high strength, good chemical durability and excellent electrical insulating properties. Porous alumina has been identied as the prime candidate as a porous bipolar membrane in ... -
Influence of dispersoids on microstructure evolution and work hardening of aluminium alloys during tension and cold rolling
(Journal article; Peer reviewed, 2013)The influence of dispersoids on work hardening of aluminium during tension and cold rolling has been studied by comparing Al–Mn alloys containing similar amounts of solutes but various dispersoid densities. The microstructure ... -
Recovery Kinetics in High Purity and Commercial Purity Aluminium Alloys
(Journal article, 2013)Motivated by improving current softening models for recycle friendly alloys, softening was investigated in high purity and commercial purity aluminium alloys. Utilizing the electron backscatter diffraction (EBSD) technique, ... -
In situ X-ray diffraction and electrochemical impedance spectroscopy of a nanoporous Li2FeSiO4/C cathode during the initial charge/discharge cycle of a Li-ion battery
(Journal article; Peer reviewed, 2013)Understanding of the structural evolution of the cathode during the charge/discharge processes is crucial to describe the Li insertion/de-insertion mechanisms in a Li-ion battery. An in situ XRD cell has been specially ... -
Structures of CaO-SiO2 , CaOMgO- SiO2 and CaO-Al2O3-SiO2 slags and with the addition of B2O3: A Raman Spectroscopic Study
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:129, Doctoral thesis, 2013) -
Dislocations in directionally solidified crystalline silicon: Generation mechanisms and interactions
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:193, Doctoral thesis, 2013)The growth of crystalline silicon from crucibles by directional solidification will invariably cause structural defects in the material. In addition, the casting process leads to the incorporation of impurities, and the ... -
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 ...