Browsing Institutt for materialteknologi by Title
Now showing items 2468-2487 of 2559
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Tribology Mechanisms in Low-Friction Hardbanding Coatings.
(Master thesis, 2013)As the shallow and easily accessible oil and gas reservoirs are becoming depleted, the oil and gas industry has turned its attention towards the deeper and more remote reservoirs. The increased drilling depth, more complex ... -
Triple-phase ceramic 2D nanocomposite with enhanced thermoelectric properties
(Journal article; Peer reviewed, 2019)A thermoelectric triple-phase p-type Ca3Co4O9-NaxCoO2-Bi2Ca2Co2O9 (CCO–NCO–BCCO) 2D nanocomposite was obtained from pressureless sintering in air. The anisotropic thermoelectric properties of the nanocomposite exhibit a ... -
Tuning Ni–MoO2 Catalyst–Ionomer and Electrolyte Interaction for Water Electrolyzers with Anion Exchange Membranes
(Peer reviewed; Journal article, 2021)Tailoring catalyst–ionomer and electrolyte interaction is crucial for the development of anion exchange membrane (AEM) water electrolysis. In this work, the interaction of Ni–MoO2 nanosheets with ionomers and electrolyte ... -
Tuning the Thermoelectric Performance of CaMnO3-Based Ceramics by Controlled Exsolution and Microstructuring
(Peer reviewed; Journal article, 2022)The thermoelectric properties of CaMnO3−δ/CaMn2O4 composites were tuned via microstructuring and compositional adjustment. Single-phase rock-salt-structured CaO–MnO materials with Ca:Mn ratios larger than unity were produced ... -
Twinnability of Al–Mg alloys: A first-principles interpretation
(Journal article; Peer reviewed, 2017)Al–Mg alloys are considered to have potentials to form twins during deformation because Mg can reduce the intrinsic stacking fault energy γISFE of Al. Nevertheless, twinning has rarely been found in Al–Mg alloys even ... -
Two routes for sonochemical synthesis of platinum nanoparticles with narrow size distribution
(Journal article; Peer reviewed, 2021)A novel sonochemical approach to synthesize platinum (Pt) nanoparticles has been developed to produce smaller, and more monodisperse particles than traditional chemical reduction methods such as the sodium borohydride ... -
Two-Phase Equilibrium Conditions in Nanopores
(Peer reviewed; Journal article, 2020)It is known that thermodynamic properties of a system change upon confinement. To know how, is important for modelling of porous media. We propose to use Hill’s systematic thermodynamic analysis of confined systems to ... -
An ultra-low field SQUID magnetometer for measuring antiferromagnetic and weakly remanent magnetic materials at low temperatures
(Journal article, 2023)A novel setup for measuring magnetic fields of antiferromagnets (i.e., quadrupolar or higher-order magnetic fields) and generally weakly remanent magnetic materials is presented. The setup features a highly sensitive ... -
Ultrahigh thermoelectric performance in Cu2−ySe0.5S0.5 liquid-like materials
(Journal article, 2017)Liquid-like thermoelectric materials have recently received heightened attentions due to their exceptional thermal and electrical transport properties. As a typical example, Cu2−ySe has good electrical transport properties ... -
Unconventional Continuous Structural Disorder at the Order-Disorder Phase Transition in the Hexagonal Manganites
(Journal article; Peer reviewed, 2019)The improper ferroelectricity in YMnO3 and other related multiferroic hexagonal manganites is known to cause topologically protected ferroelectric domains that give rise to rich and diverse physical phenomena. The local ... -
Understanding Anode Overpotential
(Journal article, 2014)In aluminium electrolysis cells the anodic process is associated with a substantial overpotential. Industrial carbon anodes are produced from a blend of coke materials, but the effect of coke type on anodic overpotential ... -
Understanding reaction mechanisms using dynamic electrochemical impedance spectroscopy: Methanol oxidation on Pt
(Journal article; Peer reviewed, 2019)Data from a combined cyclic voltammetry and dynamic electrochemical impedance spectroscopy (dEIS) study of the methanol oxidation reaction (MOR) at high temperatures was revisited using a new method for mechanistic modeling. ... -
Understanding reaction mechanisms using dynamic electrochemical impedance spectroscopy: Methanol oxidation on Pt
(Journal article; Peer reviewed, 2019)Data from a combined cyclic voltammetry and dynamic electrochemical impedance spectroscopy (dEIS) study of the methanol oxidation reaction (MOR) at high temperatures was revisited using a new method for mechanistic modeling. ... -
Understanding the Hydrothermal Formation of NaNbO3: Its Full Reaction Scheme and Kinetics
(Peer reviewed; Journal article, 2021)Sodium niobate (NaNbO3) attracts attention for its great potential in a variety of applications, for instance, due to its unique optical properties. Still, optimization of its synthetic procedures is hard due to the lack ... -
Understanding the inoculation of aluminium grains during welding under the influences of high cooling rate and high temperature gradient
(Peer reviewed; Journal article, 2023)Inoculation is an important method to generate fine equiaxed grain structures in alloys during solidification, which is widely used in shape casting and direct chill casting processes of aluminium alloys. Different from ... -
Undersøkelse av metoder for elektrodemontering og -materialer i Hoopes-prosessen
(Bachelor thesis, 2021)Aluminium fra Hall-Héroult-prosessen kan raffineres videre til superrent aluminium i en trelags elektrolyseprosess kalt Hoopes-prosessen. Elektrodene i prosessen består av grafitt, en beskyttende keramklokke, og de er ... -
Undersøkelse av urenheter i elektrolytt for produksjon av kobber
(Master thesis, 2023)Tellur-ioner (Te4+ og Te6+), vismut-ioner (Bi3+), antimon-ioner (Sb3+) og klor-ioner (Cl– ) er typiske urenheter i en kobberelektrolytt. Det var ønskelig˚a undersøke disse urenhetene da det er relativt ukjent hva slags ... -
Uniaxial Néel vector control in perovskite oxide thin films by anisotropic strain engineering
(Peer reviewed; Journal article, 2021)Antiferromagnetic (AF) thin films typically exhibit a multidomain state, and control of the AF Néel vector is challenging, as AF materials are robust to magnetic perturbations. In this paper, uniaxial Néel vector control ... -
A unified approach for the calculation of in-plane dielectric constant of films with interdigitated electrodes
(Peer reviewed; Journal article, 2020)Interdigitated electrodes (IDEs) on dielectric films is an important electrode design in electrical components such as transducers and sensors. Further development and use of IDEs for characterization of the in-plane ... -
Unraveling the enhanced stability and strength of Al Σ9 (221)[ 1 1 ¯ 0 ] symmetric tilt grain boundary with Mg segregation
(Journal article; Peer reviewed, 2022)