Blar i Institutt for materialteknologi på utgivelsesdato
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Fabrication of lead-free ferroelectric thin films based on Bi0.5Na0.5TiO3 by aqueous chemical solution deposition
(Doctoral theses at NTNU;2017:326, Doctoral thesis, 2017)Since the discovery of piezoelectric ceramic materials in the mid-20th century, piezoelectric materials have become an important research field and is currently used in a whole range of applications such as sensors and ... -
Structural and chemical stability of the hexagonal manganites
(Doctoral theses at NTNU;2017:252, Doctoral thesis, 2017)The link between atomic interactions and functional properties in the fascinating material system called hexagonal manganites is investigated in this thesis. By using both neutron scattering measurements and first principles ... -
The role of silicon nitride crucible materials on silicon ingots contamination
(Master thesis, 2017)This work focuses on the characterisation of the solid diffusion mechanism of iron and titanium impurities in a silicon nitride crucible, as a substitute for silica crucibles currently used for solar cells production. This ... -
Effect of microstructure on the corrosion resistance of duplex stainless steels: Materials performance maps
(Journal article; Peer reviewed, 2017)Although super duplex stainless steels (25Cr SDSS) are extensively used in oil and gas production due to their excellent combination of mechanical properties and corrosion resistance they are susceptible to the precipitation ... -
Cristobalite formation on quartz crucibles inner surface for CZ solar cell ingot production
(Master thesis, 2017)Cristobalite, the stable high temperature polymorph of quartz, is formed on the surface of fused quartz crucibles used for the growth of monocrystalline silicon ingots by the Czochralski process. When not controlled and ... -
Comparison of C14- and C15-Predomiated AB2 Metal Hydride Alloys for Electrochemical Applications
(Journal article, 2017)Herein, we present a comparison of the electrochemical hydrogen-storage characteristics of two state-of-art Laves phase-based metal hydride alloys (Zr21.5Ti12.0V10.0Cr7.5Mn8.1Co8.0Ni32.2Sn0.3Al0.4 vs. Zr25.0Ti6.5V3.9Mn22 ... -
Fabrication of Lead-Free Bi0.5Na0.5TiO3 Thin Films by Aqueous Chemical Solution Deposition
(Journal article; Peer reviewed, 2017)Piezoelectric ceramics are widely used in actuator applications, and currently the vast majority of these devices are based on Pb(Zr,Ti)O3 , which constitutes environmental and health hazards due to the toxicity of lead. ... -
Characterization of a Commercial Anti-Icing Coating - An effort to further the understanding of the relationship between surface treatment, hydrophobicity and the ability to prevent formation of ice on structures.
(Master thesis, 2017)Icing on structures such as wind turbines, ships and overhead powerline is a major problem in regions prone to sub-zero temperatures. The removal of ice on a surface is both costly and requires constant surveillance. In ... -
Proteinadsorption auf Edelstahl in der Lebensmittelindustrie - Gibt es Wege zu foulingresistenten Oberflächen?
(Journal article; Peer reviewed, 2017)Kann die Oberfläche von Edelstahl dazu beitragen, Fouling zu verhindern? Fouling, d.h. Proteinadsorption, in vielen Fällen gefolgt von Mineralablagerung, hat hohe Kosten u.a. in der Lebensmittelindustrie zur Folge. Ansätze ... -
Influence of Electrode Gas Flow Rate and Solid Oxide Ratio in Electrolyte on the Seebeck Coefficient of Molten Carbonate Thermocell
(Journal article; Peer reviewed, 2017)Thermocells represent a promising way to utilize heat as a power source. The aim of this work is to develop a thermocell with identical gas electrodes using molten carbonate-based electrolytes. The cell can generate power ... -
Shock Heating Test of Quartz for Si and FeSi Production
(Research report, 2017)Six different quartz types used as raw material for Si and FeSi production, were shock heated to 1500 °C in an induction furnace. The amounts of fines produced were measured and compared. The method has been used before ... -
The Effect of Varying Mixing Temperatures and Baking Level on the Quality of Pilot Scale Anodes - A Factorial Design Analysis
(Journal article; Peer reviewed, 2017)Identifying optimum anode baking level and mixing temperature are important when producing high quality anodes. The effect of varying mixing temperature and baking level were investigated in terms of the resulting apparent ... -
Temporal stability of a-Si:H and a-SiNx:H on crystalline silicon wafers
(Journal article; Peer reviewed, 2017)The temporal stability of single layer thin films of hydrogenated amorphous silicon (a-Si:H) and silicon nitride (a-SiNx:H) passivated crystalline silicon wafers have been investigated over 18 months. The thin films were ... -
Effekt av sigma fase i super duplex rustfritt stål (SDSS) studert ved in situ kaldstrekning i SEM
(Master thesis, 2017)Denne masteroppgaven har tatt for seg undersøkelser av super duplex rustfritt stål ved bruk av elektronmikroskopi i kombinasjon med diffraksjon av tilbakespredte elektroner (Electron Backscatter Diffraction EBSD). Målet ... -
Effect of carbonization conditions on CO2 gasification reactivity of biocarbon
(Journal article; Peer reviewed, 2017)Substituting fossil reductants with biocarbon is a promising way for reducing greenhouse gas emissions and increase sustainability of the metallurgical industry. Biocarbon can be produced from a wide range of raw biomass ... -
The role of vacancy condensation for the formation of voids in rutile TiO2 nanowires
(Journal article; Peer reviewed, 2017)Titanium dioxide nanowire (NW) arrays are incorporated in many devices for energy conversion, energy storage, and catalysis. A common approach to fabricate these NWs is based on hydrothermal synthesis strategies. A drawback ... -
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 ... -
Soft particles assisted grain refinement and strengthening of an Al-Bi-Zn alloy subjected to ECAP
(Journal article; Peer reviewed, 2017)With the aim to improve the strength of potential Pb-free Al-Bi based bearing alloys, an Al-6Bi-8Zn alloy was subjected to equal channel angular pressing (ECAP). To reveal the roles played by the soft Bi particles, an ... -
Cell Performance Comparison between C14- and C15-Predomiated AB2 Metal Hydride Alloys
(Journal article, 2017)The performance of cylindrical cells made from negative electrode active materials of two selected AB2 metal hydride chemistries with different dominating Laves phases (C14 vs. C15) were compared. Cells made from Alloy C15 ... -
Thermoelectrochemical Cell with Molten Carbonate Electrolyte
(Journal article, 2017)Industrial processes for production of metals and alloys by metallurgical and electrochemical methods generate a lot of heat due to irreversible losses. The waste heat should be used to generate electricity. Commercial ...