Blar i Institutt for materialteknologi på utgivelsesdato
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Deformation of an Al-7Mg alloy with extensive structural micro-segregations during dynamic plastic deformation
(Journal article; Peer reviewed, 2015)The microstructure evolution and deformation behavior of an as-cast Al–7Mg alloy with severe Mg segregation zones distributed on grain boundaries and in interdendrite regions subjected to dynamic plastic deformation (DPD) ... -
High temperature corrosion and corrosion protection of metallic interconnects for SOFC
(Doctoral thesis at NTNU;2015:155, Doctoral thesis, 2015)Reducing solid oxide fuel cells (SOFCs) operation temperature from 900-100 °C to 700-800 °C, has made the substitution of traditional lanthanum chromate (LaCrO3) ceramic interconnect with metallic interconnect possible. ... -
Spatial methods for characterising carbon anodes for aluminium production
(Journal article, 2015)Pilot test anodes were designed by Hydro Aluminium for laboratory studies using controlled blends of <2 mm aggregate from two single source cokes. Spa- tial and imaging methods were used to characterise anode surfaces with ... -
Fabrication and Characterization of an Intermediate Band Material based on Ion Implantation and Pulsed Laser Melting of Ag in Fz-Si
(Master thesis, 2015)Intermediate band solar cells (IBSCs) are an innovative field of material engineering and their prospect of high efficiency may contribute to meet the demand for new energy alternatives. IBCSs are based on absorption of ... -
Recrystallisation Behaviour in Extruded Profiles of Non-Dispersoid Containing Al-Mg-Si Alloys
(Master thesis, 2015)Hot extrusion of non-dispersoid containing aluminium alloys commonly ends with a fully or partially recrystallised grain structure. However, the recrystallisation mechanisms, whether static or dynamic (taking place during ... -
Experimental Investigations and Modelling of Solid-State Ilmenite Reduction with Hydrogen and Carbon Monoxide
(Doctoral thesis at NTNU;2015:309, Doctoral thesis, 2015)Ilmenite is an important raw material for titanium-containing products. Currently, it is processed using large amounts of coal but this could be substituted with natural gas. This could potentially increase the efficiency ... -
Strain-path change induced transients in flow stress, work hardening and r-values in aluminum
(Journal article, 2015)Commercially pure aluminum with random texture was prestrained either by rolling or by uniaxial compression, and then tested in uniaxial tension to study the transients in flow stress, work hardening and r-value induced ... -
Carbon-Supported Nanostructured Core-Shell Catalysts for Low Temperature Fuel Cells
(Master thesis, 2015)The direct methanol fuel cell needs a catalyst with low overpotential and high current density for methanol oxidation to be commerically viable. The catalyst with highest performance at the moment is the PtRu-alloy catalyst, ... -
Precipitation, strength and work hardening of age hardened aluminium alloys
(Journal article; Peer reviewed, 2015)The strength and work hardening of age hardened AA6063 and AA6082 alloys have been investigated in terms of a detailed characterization of precipitate and dislocation structures obtained by TEM and SEM. Tensile and compression ... -
Self-Poling and Ageing in PZT Thin Films With Interdigitated Electrodes - Work done at Laboratoire de Céramique (LC), EPFL
(Master thesis, 2015)This work details advances in thin-film lead zirconate titanate (PZT) devices with interdigitated electrodes (IDEs). They are interesting for energy harvesting applications, as they can provide small amounts of electrical ... -
Dispersoid Structures and Properties of Cr and Zr-containing 6xxx Extrusion Alloys
(Master thesis, 2015)The overall objective of this work has been to study the dispersoid structures introduced by adding Cr and Zr to an AA6082 alloy and other features which may influence and improve the mechanical properties of the alloy. ... -
The performance of aluminium electrolysis in cryolite based electrolytes containing LiF, KF and MgF2 in a laboratory-scale cell
(Doctoral thesis at NTNU;2015:254, Doctoral thesis, 2015)The electrolyte composition plays a very important role in aluminium electrolysis. Higher current efficiency and lower energy consumption can be obtained through modifying the composition of the electrolyte. The important ... -
Formation of incoherent deformation twin boundaries in a coarse-grained Al-7Mg alloy
(Journal article; Peer reviewed, 2015)Deformation twinning has rarely been observed in coarse grained Al and its alloys except under some extreme conditions such as ultrahigh deformation strain or strain rates. Here, we report that a significant amount of Σ3 ... -
Optical properties of single diatom frustules revealed by confocal microspectroscopy
(Journal article; Peer reviewed, 2015)Optical properties of single diatom frustule valves from two different Coscinodiscus species (C. wailesii and C. centralis) are studied by transmission confocal hyperspectral imaging and numerical calculations. Light ... -
Interactions between the process and the lining in a silicon furnace - Modelling placments of thermocouples
(Master thesis, 2015)The aim of this thesis is to investigate the interactions between the process and the lining in a silicon furnace. During operation of a silicon furnace incidents may occur that leads to the bottom of the furnace lining ... -
A semianalytical method for simulating mass transport at channel electrodes
(Journal article; Peer reviewed, 2015)A method for simulating electrode reactions in channel flow is developed and efficiently implemented in the symbolic algebra program Maple™. The steady-state convective diffusion equation for fully developed 2-D laminar ... -
CHARACTERISATION OF IRIDIUM OXIDE BY SCANNING PROBE, ELECTROCHEMICAL, AND PHOTOELECTROCHEMICAL METHODS
(Doctoral thesis at NTNU;2015:215, Doctoral thesis, 2015) -
Microscopic Study of Carbon Surfaces Interacting with High Carbon Ferromanganese Slag
(Journal article; Peer reviewed, 2015)The interaction of carbon materials with molten slags occurs in many pyro-metallurgical processes. In the production of high carbon ferromanganese in submerged arc furnace, the carbothermic reduction of MnO-containing ... -
Seebeck coefficients of cells with molten carbonates relevant for the metallurgical industry
(Journal article; Peer reviewed, 2015)We report Seebeck coefficients of electrochemical cells with molten carbonate mixtures as electrolytes and carbon dioxide|oxygen electrodes. The system is relevant for use of waste heat and off-gases with concentration of ... -
Strength contributions from precipitates
(Journal article; Peer reviewed, 2015)A theory for the strength contribution from precipitates is developed based on the statistical particle-size and shape distributions and the corresponding obstacle strengths. The generic case of spherical precipitates and ...