Browsing Institutt for materialteknologi by Title
Now showing items 1-20 of 1545
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10 nm deep, sub-nanoliter fluidic nanochannels on germanium for attenuated total reflection infrared (ATR-IR) spectroscopy
(Journal article; Peer reviewed, 2017)The fabrication of sub-nanoliter fluidic channels is demonstrated, with merely 10 nm depth on germanium, using conventional semiconductor device fabrication methods and a polymer assisted room-temperature sealing method. ... -
134Ba diffusion in polycrystalline BaMO3 (M = Ti, Zr, Ce)
(Journal article; Peer reviewed, 2017)Cation diffusion in functional oxide materials is of fundamental interest, particularly in relation to interdiffusion of cations in thin film heterostructures and chemical stability of materials in high temperature ... -
1D oxide nanostructures from chemical solutions
(Journal article; Peer reviewed, 2014)Nanotechnology has motivated a tremendous effort to grow free standing or hierarchical nanomaterials such as nanowires and nanorods. Bottom-up approaches based on chemistry are an important approach to nanomaterials, and ... -
3D aligned-carbon-nanotubes@Li2FeSiO4 arrays as high rate capability cathodes for Li-ion batteries
(Journal article; Peer reviewed, 2013-09-27)3D aligned-carbon-nanotubes (ACNTs)@Li2FeSiO4 nanocomposite arrays on Al foil were developed as cathode materials for Li-ion batteries. The ACNTs were grown directly on an Al foil by a chemical vapor deposition method to ... -
3D non-isothermal phase-field simulation of microstructure evolution during selective laser sintering
(Journal article; Peer reviewed, 2019)During selective laser sintering (SLS), the microstructure evolution and local temperature variation interact mutually. Application of conventional isothermal sintering model is thereby insufficient to describe SLS. In ... -
4d/5d Transition Metals in Perovskite Cathode Materials
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:131, Doctoral thesis, 2013)Solid oxide fuel cells (SOFCs) have the potential to convert chemical energy to electrical energy in an efficient and environmentally friendly manner. The high operational temperatures of the first generation of SOFCs ... -
96Zr Tracer Diffusion in AZro3 (A = Ca, Sr, Ba)
(Journal article; Peer reviewed, 2018)Cation tracer diffusion in polycrystalline AZrO3 (A = Ca, Sr, Ba) perovskites was studied at 1300–1500 °C in air using the stable isotope 96Zr. Thin films of 96ZrO2 were deposited on polished ceramic pellets by drop casting ... -
A 2D sediment bed morphodynamics model for turbulent, non-Newtonian, particle-loaded flows
(Chapter, 2017)In petroleum drilling, cuttings transport problems, i.e. an accumulation of drilled of solids in the wellbore, are a major contributor to well downtime and have therefore been extensively researched over the years, both ... -
A combined isotropic, kinematic and distortional hardening model for aluminum and steels under complex strain-path changes
(Journal article; Peer reviewed, 2018)In this work, a new model is proposed for predicting stress transients caused by strain path changes. The model is formulated in stress space, where a second order tensor, i.e., the microstructure stress deviator, is used ... -
A comprehensive study on improved power materials for high-temperature thermoelectric generators
(Journal article; Peer reviewed, 2019)Dense Ca3Co4O9-NaxCoO2-Bi2Ca2Co2O9 (CCO-NCO-BCCO) nanocomposites were produced from sol-gel derived Ca2.25Na0.3Bi0.35Tb0.1Co4O9 powder by four methods: Hot-pressing (HP), spark plasma sintering (SPS) and pressureless ... -
A computational study of recrystallisation and grain growth using a 3D Potts Monte Carlo model
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:34, Doctoral thesis, 2009)The ever increasing capability of computer systems and the advances in theoretical understanding of the underlying physics and chemistry of materials have, over the last couple of decades, provided the basis for mathematical ... -
A concept for electrowinning of aluminium using depolarized gas anodes
(Journal article; Peer reviewed, 2014)Aluminium is today commercially produced by the Hall-Héroult process using consumable carbon anodes. Consumable anodes have some concerns such as CO2 emission, continuous anodecathode distance adjustments and replacements ... -
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 ... -
A first-principles Study of epitaxial Interfaces between Graphene and GaAs
(Master thesis, 2014)Epitaxial interfaces between graphene and GaAs(111) have been investigated through a first-principles study using density functional theory (DFT). The GaAs(111) surface at the interface is assumed to be 2x2 reconstructed ... -
A First-Principles Study of the Al (001)/Fe(0-11) Interface
(Journal article; Peer reviewed, 2018)Two phase Stefan problem was solved using analytical method in cylindrical domain. To solve governing equations Eigen conditions were formulated by using separation of variable technique. Eigenvalues of the eigencondition ... -
A Method for Assessment of Recyclability of Aluminum from Incinerated Household Waste
(Journal article; Peer reviewed, 2019)Aluminum is widely used in daily household consumable goods such as food and drink packaging materials, storage containers, etc. The disposal of such goods into household waste means that this waste stream contains a ... -
A method for comparing the HF formation potential of aluminas with different water contents
(Chapter, 2012)In the aluminium industry today, smelters often have to rely on more than one alumina supplier. This creates diversity in the properties of smelter grade alumina (SGA). A method has been developed to compare the HF formation ... -
A Method for Controlled Oxide and Carbon Coating of Silicon Nanoparticles as Anode in Lithium-Ion Batteries
(Master thesis, 2017)Silicon has emerged as a promising alternative to graphite in lithium-ion batteries. Silicon can, theoretically, provide up to ten times higher capacity due to its high alloying capabilities with lithium. This improvement ... -
A methodology to assess the spatial distribution of dispersoids in AL-MG-Si alloys
(Chapter, 2018)Al-Mg-Si alloys often add small additions of e.g. Mn or Cr, to form dispersoids, which may act as nucleation sites for Mg2Si particles after homogenization. The purpose is to ensure a high density of uniformly distributed ... -
A methodology to assess the spatial distribution of dispersoids in Al-Mg-Si alloys
(Chapter, 2018)Al-Mg-Si alloys often add small additions of e.g. Mn or Cr, to form dispersoids, which may act as nucleation sites for Mg2Si particles after homogenization. The purpose is to ensure a high density of uniformly distributed ...