Blar i Institutt for materialteknologi på utgivelsesdato
Viser treff 41-60 av 2496
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Electrochemical Oxidation of Methanol and Formic Acid in Fuel Cell Processes
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:204, Doctoral thesis, 2005)The main objectives of the thesis work were: (1), to study the oxidation of methanol and formic acid on platinum electrodes by employing conventional and advanced electrochemical methods, and (2), to develop membrane ... -
Determination of Oxygen Transport Coefficients in Perovskites and Perovskite related Materials with mixed Conductivity
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:191, Doctoral thesis, 2005)Perovskites and perovskite related materials are materials that are candidates for applications such as oxygen permeable membranes, cathodes for SOFC and high-temperature oxygen sensors. This arises from the potential high ... -
Effect of trace element lead on the electrochemistry and corrosion of aluminium alloys
(Doctoral thesis, 2005)Electrochemical activation of aluminium in chloride solution as a result of heat treatment at temperatures above 350°C is attributed to enrichment of trace element lead at the oxide-metal interface. Activation is manifested ... -
Silicon for Solar Cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:140, Doctoral thesis, 2005)This thesis work consists of two parts, each with a different motivation. Part II is the main part and was partly conducted in industry, at ScanWafer ASA’s plant no.2 in Glomfjord. The large growth in the Photo Voltaic ... -
Operational Experience and Control Strategies for a Stand-Alone Power System based on Renewable Energy and Hydrogen
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:28, Doctoral thesis, 2005)The topic of this thesis is investigation of a small-scale stand-alone power system, based on both experimental work and computer simulations. The power system in this study uses solar energy as energy input, lead-acid ... -
Intergranular corrosion of AA6000-series aluminium alloys
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:47, Doctoral thesis, 2005)Even though highly corrosion resistant in general, AlMgSi (6000-series) alloys may sometimes develop susceptibility to intergranular corrosion (IGC). In this work the effect of Cu content and various thermomechanical ... -
Precipitation behaviour and recrystallisation resistance in aluminum alloys with additions of hafnium, scandium and zirconium
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:145, Doctoral thesis, 2005)The overall objective of this work has been to develop aluminium alloys, which after hot and cold deformation are able to withstand high temperatures without recrystallising. This has been done by investigating aluminium ... -
Mechanical Properties and Phase Stability of Oxygen Permeable Membranes La0.5Sr0.5Fe1-xCoxO3-δ
(Doktoravhandlinger ved NTNU, 1503-8181; 2005:51, Doctoral thesis, 2005)Ceramic membranes made from mixed oxygen-ionic and electronic conducting perovskite oxides can selectively separate oxygen from air at elevated temperatures. These membranes have several potential applications that require ... -
Prediction of mineral scale formation in wet gas condensate pipelines and in meg (mono ethylene glycol) regeneration plants
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:137, Doctoral thesis, 2006)Gas hydrate formation is a serious problem in the oil and gas industry, since its formation can plug wells and prevent production. The gas hydrate is a crystalline solid with a natural gas molecule surrounded by a cage of ... -
Synthesis and Characterization of CeO2- and LaNbO4-based Ionic Conductors
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:181, Doctoral thesis, 2006)Ceramic electrolytes that conduct either oxygen ions or protons at intermediate temperatures are important materials for use in e.g. solid oxide fuel cells, the prime candidate to produce electricity by electrochemical ... -
Stress Induced Problems in Himalayan Tunnels with Special Reference to Squeezing
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:20, Doctoral thesis, 2006)There is a huge potential of underground constructions in the Himalayan region for hydropower, transport systems and conservation of environment. However, the tectonic activities have resulted with a fragile regional ... -
Dynamic behaviour of fuel cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2006:94, Doctoral thesis, 2006)This thesis addresses the dynamic behaviour of proton exchange membrane fuel cells (PEMFCs) and alkaline fuel cells (AFCs). For successful implementation in automotive vehicles and other applications with rapidly varying ... -
Cation diffusion in LaMnO3, LaCoO3 and LaFeO3 materials
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:173, Doctoral thesis, 2007) -
Characterisation and Plasticity in Extruded Al-Mg-Si Profiles engaging In-situ EBSD
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:154, Doctoral thesis, 2007)A comprehensive characterisation and study of plasticity in two extruded Al-Mg-Si profiles has been carried out. The primary objective of the experimental work has been directed towards obtaining an improved understanding ... -
Porosity development in composite carbon materials during heat treatment
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:101, Doctoral thesis, 2007) -
Experimental and theoretical investigations of metal dusting corrosion in plant exposed nickel-based alloys
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:50, Doctoral thesis, 2007)This doctoral thesis is concerned with experimental and theoretical studies of high temperature corrosion phenomena in plant exposed nickel-based alloys. Different complementary experimental techniques have been used to ... -
Modelling of Dynamic Arc Behaviour in a Plasma Reactor
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:38, Doctoral thesis, 2007) -
Development of carbon membranes for hydrogen recovery
(Doktoravhandlinger ved NTNU, 1503-8181; 2007:196, Doctoral thesis, 2007)The recovery of hydrogen from gas mixtures with hydrocarbons may provide a commercial niche for carbon molecular sieve membranes (CMSMs). Previous work has shown that carbon membranes achieve excellent performance, with ... -
Oxidation driven decomposition of CeNbO4 in pure oxygen
(Journal article; Peer reviewed, 2008)CeNbO4 possess oxygen hyper-stoichiometry at ambient and moderate temperature. At elevated temperature CeNbO4+δ is thermally reduced to near stoichiometric CeNbO4 accompanied by a structural phase transition. Above the ... -
The anode process on carbon in chloride-oxide melts
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:120, Doctoral thesis, 2008)