Blar i Institutt for materialteknologi på tittel
Viser treff 460-479 av 2562
-
Decrepitation of Comilog, Assmang and UMK manganese ores during prereduction
(Master thesis, 2020)Produksjon av manganlegeringer er en industri som forbruker mye elektrisk energi og karbonmaterialer. Prereduksjon av manganmalm er ønsket for å senke forbruket av elektrisk energi og karbonmaterialer. For at dette skal ... -
Deep hydration of an Li7-3xLa3Zr2MIIIxO12solid-state electrolyte material: A case study on Al- and Ga-stabilized LLZO
(Peer reviewed; Journal article, 2022)Single crystals of an Li-stuffed, Al- and Ga-stabilized garnet-type solid-state electrolyte material, Li7La3Zr2O12 (LLZO), have been analysed using single-crystal X-ray diffraction to determine the pristine structural state ... -
Defect chemistry and ferroelectric domain walls in hexagonal manganites
(Doctoral theses at NTNU;2018:263, Doctoral thesis, 2018)The hexagonal manganites h-RMnO3 (R=Y, In, Sc, Ho-Lu) have been studied the last two decades for their exotic and diverse functional properties. Their large chemical flexibility makes this material class an ideal chemical ... -
Defect Chemistry as a Crystal Structure Design Parameter: Intrinsic Point Defects and Ga Substitution in InMnO3
(Journal article, 2017)The effect of defect chemistry on the polar and nonpolar phases of hexagonal InMnO3 is investigated using first-principles density functional calculations. Our motivation is to show how point defects and substitutional ... -
Defect Engineering in Plasmonic Metal Oxide Nanocrystals
(Journal article; Peer reviewed, 2016)Defects may tend to make crystals interesting but they do not always improve performance. In doped metal oxide nanocrystals with localized surface plasmon resonance (LSPR), aliovalent dopants and oxygen vacancies act as ... -
Defect related radiative recombination in mono-like crystalline silicon wafers
(Journal article, 2017)We report on studies of sub-bandgap defect related photoluminescence (DRL) signals originating from radiative recombination through traps in the bandgap of cooled mono-like silicon wafers. Spectrally resolved photoluminescence ... -
Defect-Enhanced Polarization Switching in the Improper Ferroelectric LuFeO3
(Peer reviewed; Journal article, 2020)Results of switching behavior of the improper ferroelectric LuFeO3 are presented. Using a model set of films prepared under controlled chemical and growth‐rate conditions, it is shown that defects can reduce the quasi‐static ... -
Defect-impurity interactions in high performance multicrystalline silicon
(Doctoral theses at NTNU;2018:339, Doctoral thesis, 2018)Defect-impurity interactions in high performance multicrystalline silicon The global average and combined land and ocean surface temperature is steadily rising for the last several decades. About 97% of climate scientists ... -
Defects and ferroelectricity in LaWN3
(Master thesis, 2024)I jakten på bedre og mer pålitelige minneenheter, har det blitt lagt stor innsats i utviklingen av ferroelektriske enheter til non-volatile random-access memory (NVRAM). Fordelen ferroelektrisk random-access memory (FeRAM) ... -
Defects in multicrystalline Si wafers studied by spectral photoluminescence imaging, combined with EBSD and dislocation mapping
(Journal article; Peer reviewed, 2016)Defect related sub-band gap luminescence emissions due to Shockley-Read-Hall recombination in mc-Si wafers have been investigated with spectral photoluminescence imaging, combined with electron backscatter diffraction and ... -
Deflecting Dendrites by Introducing Compressive Stress in Li7La3Zr2O12 Using Ion Implantation
(Peer reviewed; Journal article, 2023)Lithium dendrites belong to the key challenges of solid-state battery research. They are unavoidable due to the imperfect nature of surfaces containing defects of a critical size that can be filled by lithium until fracturing ... -
Deformation and Softening behaviour of commercial AlMn-alloys: Experiments and Modelling
(Dr. ingeniøravhandling, 0809-103X; 2003:82, Doctoral thesis, 2003)A comprehensive study of the softening behaviour of two different non-heat treatable AlMn-alloys has been carried out. These alloys were a laboratory processed and an industrially processed AA3103-alloy. The primary objective ... -
Deformation behavior, microstructure evolution, and dynamic recrystallization mechanism of an AZ31 Mg alloy under high-throughput gradient thermal compression
(Peer reviewed; Journal article, 2022)A high-throughput gradient thermal compression process was adopted to investigate the effects of thermal deformation parameters on the deformation behavior and microstructure evolution of a rolled AZ31 Mg alloy. The results ... -
Deformation defects and electron irradiation effect in nanostructured Al-Mg alloy processed by severe plastic deformation
(Journal article; Peer reviewed, 2012)In order to explore the exact nature of deformation defects previously observed in nanostructured Al-Mg alloys subjected to severe plastic deformation, a more thorough examination of the radiation effect on the formation ... -
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) ... -
Deformation Texture Evolution in Flat Profile AlMgSi Extrusions: Experiments, FEM, and Crystal Plasticity Modeling
(Peer reviewed; Journal article, 2021)In the present work, the deformation textures during flat profile extrusion from round billets of an AA6063 and an AA6082 aluminium alloy have been numerically modeled by coupling FEM flow simulations and crystal plasticity ... -
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 ... -
Degradation mechanisms of AA 1350 aluminium alloy conductor strands in air and chloride solution
(Doctoral theses at NTNU;2020:170, Doctoral thesis, 2020)The primary aim of this doctoral thesis is to investigate the degradation mechanisms contributing to the failure of the aluminium strand material (AA 1350) used in steel reinforced aluminium conductors. These conductors ... -
Degradation of Cathode Lining in Hall-Héroult Cells
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:241, Doctoral thesis, 2010)The aluminium industry is continually facing the problem to lower the energy consumption and to increase the productivity by improving the current high amperage cell technology. Another challenge is to eliminate cell ... -
Degradation of Refractory Lining in Carbon Anode Baking Furnaces
(Doctoral theses at NTNU;2019:340, Doctoral thesis, 2019)Primary aluminium metal is produced by electrochemical reduction of Al2O3 at ~960 ºC, during which large amounts of carbon anodes are consumed. The anodes are thus constituting an important part of the production process. ...