Blar i Institutt for materialteknologi på tittel
Viser treff 1096-1115 av 2496
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Impurity distribution and reduction behaviour of quartz in the production of high purity silicon
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:182, Doctoral thesis, 2012)The production of solar grade silicon is based on the use of expensive high purity carbon and quartz feedstock as well as various silicon refining techniques. Impurities in the feedstock materials enter the silicon during ... -
Impurity effect of Mg on the generalized planar fault energy of Al
(Journal article; Peer reviewed, 2016)Generalized planar fault energy (GPFE) curves are widely used to evaluate the deformation behavior of metals and alloys. In the present work, a systematic analysis of the microscopic plastic deformation mechanism of ... -
Impurity Elements in Raw Gas Ultra-Fines from Aluminium Electrolysis Cells
(Journal article; Peer reviewed, 2012)The effect of alumina feeding and pot suction rate on the amount and composition of fine particles in raw gases has been investigated. Particle size distribution of ultra-fines (Di < 10 μm) were measured in real time and ... -
Impurity removal from Si by Si-Ca-Mg ternary alloying-leaching system
(Peer reviewed; Journal article, 2020)In this work, Si-Ca-Mg alloys were made with different compositions and solidification conditions to investigate the impurity segregation and separation performance from Si, especially for the crucial P impurity at several ... -
Impurity segregation at defects in Al and Si -A theoretical DFT based study
(Doctoral theses at NTNU;2017:273, Doctoral thesis, 2017)Alien impurity elements favor to stay at the defects, e.g. stacking fault, grain boundary (GB) in host materials and thus influence many material properties. On basis of atomistic simulations, the present thesis puts a ... -
In operando neutron diffraction study of LaNdMgNi9H13 as a metal hydride battery anode
(Journal article; Peer reviewed, 2017-03-01)La2MgNi9-related alloys are superior metal hydride battery anodes as compared to the commercial AB5 alloys. Nd-substituted La2-yNdyMgNi9 intermetallics are of particular interest because of increased diffusion rate of ... -
In situ and operando observation of surface oxides during oxygen evolution reaction on copper
(Journal article; Peer reviewed, 2017)Formation and dissolution of oxide on copper under transpassive conditions, i.e. during OER and transpassive dissolution, in alkaline electrolyte was investigated by a combination of electrochemical techniques and in situ ... -
In situ characterisation for studying nucleation and growth of nanostructured materials and thin films during liquid-based synthesis
(Peer reviewed; Journal article, 2022)Knowledge about the nucleation, growth, and formation mechanisms during materials synthesis using sol-gel and solution-based methods is important to design a material with desired properties. We used aqueous chemical ... -
In situ characterization during hydrothermal synthesis of alkali niobates
(Doctoral theses at NTNU;2018:318, Doctoral thesis, 2018) -
In situ Characterization of Ferroelectric Oxide Thin Films during Aqueous Chemical Solution Deposition
(Doctoral theses at NTNU;2020:144, Doctoral thesis, 2020)Ferroelectric materials are used in a wide range of applications, including capacitors and non-linear optical devices. Utilization of ferroelectric thin films is especially desirable due to the possibility to tailor the ... -
In situ EBSD Investigations of the Nucleation and Growth of Intermetallic Phases in a SDSS
(Master thesis, 2019)Super dupleks rustfritt stål (SDSS) blir brukt i brønnar med høg temperatur og høgt trykk i olje- og gassindustrien på grunn av den gode kombinasjonen av høg korrosjonsmotstand og gode mekaniske eigenskapar. Men SDSS er ... -
In situ exsolution synthesis of composite cathodes for protonic ceramic fuel cells
(Doctoral theses at NTNU;2018:127, Doctoral thesis, 2018)Protonic ceramic fuel cells (PCFCs) have the potential to operate with hydrogen as a fuel in an environmentally friendly manner with no emissions and high electrical efficiency. The lower operation temperature of PCFCs due ... -
In situ formation of a polypyrrole-coating on a carbon-coated LiNi0.5Mn1.5O4 cathode in Li-ion batteries as a strategy for enhanced cycling stability.
(Master thesis, 2023)Li-ion batterier (LiBs) er den ledende batteriteknologien for bærbare enheter og forbrukerelektronikk i dagens marked. Konvensjonelle katodematerialer anvendt i disse batteriene inneholder ofte kobolt, som er giftig, dyrt, ... -
In situ high temperature spectroscopic study of liquid inclusions and hydroxyl groups in high purity natural quartz
(Peer reviewed; Journal article, 2021)High purity natural based quartz is used as raw material for production of crucibles for solar-grade silicon production. The crucible properties are strongly related to presence of water and hydroxyl groups in the raw ... -
In situ investigation of spinodal decomposition in hypermonotectic Al–Bi and Al–Bi–Zn alloys
(Journal article; Peer reviewed, 2008)Spinodal decomposition of hypermonotectic Al–6 wt.%Bi, Al–8 wt.%Bi and Al–6 wt.%Bi–8 wt.%Zn alloys has been investigated using synchrotron radiography. In the case of the 6 and 8 wt.%Bi binary alloys undercoolings of ... -
In Situ Measurements of the Chemical Stability of a Cast Aluminum Alloy Embedded in a Cement Paste with a High Amount of Supplementary Cementitious Material
(Peer reviewed; Journal article, 2021)In traditional reinforced concrete, the alkaline pore solution which passivates the steel rebars will get neutralized with time in an exposed environment. Therefore, to prevent corrosion initiation, the permeability of the ... -
In situ monitoring of pit gas composition during baking of anodes for aluminum electrolysis
(Journal article; Peer reviewed, 2019)Carbon anodes, which are consumed in aluminum electrolysis, are fabricated in separate anode plants where coke and pitch are mixed and vibrocompacted to green anode blocks before being baked in anode baking furnaces. The ... -
In situ nanocomposites for high voltage insulation
(Doctoral theses at NTNU;2022:36, Doctoral thesis, 2021)Rapid technological developments and the expanding scope of human activity has significantly increased energy demands. This has resulted in increasing requirements for insulation systems with improved dielectric, mechanical, ... -
In situ observation of the carbothermic reduction and foaming of slags in silicomanganese production
(Journal article; Peer reviewed, 2021)The carbothermic reduction of slag in silicomanganese production is accompanied by the release of carbon monoxide. This gas can accumulate as bubbles within the slag, leading to foaming and, potentially, disturbances to ... -
In situ strekkforsøk med EBSD karakterisering av HSLA-stål ved romtemperatur og -60 °C
(Master thesis, 2011)Denne oppgaven har tatt for seg et 420 MPa HSLA stål. Stålet ble sveisesimulertfor å oppnå mikrostruktur tilsvarende grovkornet og interkritisk grovkornetHAZ. Interkritisk grovkornet HAZ ble oppnådd ved en tosyklus ...