Blar i Institutt for materialteknologi på utgivelsesdato
Viser treff 421-440 av 2540
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The effect of heat treatment and cooling rate on the properties of lightweight aggregates
(Journal article; Peer reviewed, 2014)Lightweight aggregates (LWA) were produced from clay in the laboratory. After firing different heat treatments and cooling rates were applied andthe resulting material was investigated with respect to strength and ... -
Tribological Performance of Polymers and Lubricants Used in Offshore Compensating Hydraulic Cylinders
(Master thesis, 2014)The direct-acting (N-line) riser tensioning system is a commonly selected option for riser tensioning on offshore deepwater drilling vessels. As the system operates in the splash zone, it is exposed to a corrosive environment ... -
Octoxy capped Si nanoparticles synthesized by homogeneous reduction of SiCl4 with crown ether alkalide
(Journal article; Peer reviewed, 2014)Blue-green luminescent octoxy capped Si nanoparticles were synthesized via homogeneous reduction of SiCl4 with the crown ether alkalide K+(15-crown-5)2K− in tetrahydrofuran. The Si nanoparticles were characterized with ... -
The Aluminium Stock in Non-Residential Buildings in Trondheim: A Bottom-Up Study Based on Building Type-Cohorts
(Master thesis, 2014)Aluminium scrap is a valuable commodity in a monetary sense, but also in the sense that its utilization is an important step in reducing greenhouse gas emissions. It is both beneficial and necessary that an increasing share ... -
Online monitoring of aluminium primary production gas composition by use of Fourier-transform infrared spectroscopy
(Journal article; Peer reviewed, 2014)Online monitoring of aluminium primary production raw gas is challenging due to the high concentration of HF in the presence of water. Tunable Diode Laser (TDL) analyzers retrofitted with sapphire optical windows allow for ... -
Control of conductivity and electric field induced strain in bulk Bi0.5K0.5TiO3-BiFeO3 ceramics
(Journal article; Peer reviewed, 2014)High electrical conductivity is one of the main obstacles for advances of bulk BiFeO3 ceramics in piezoelectric applications. Here, we demonstrate that the electrical conductivity of BiFeO3 can be lowered by compositional ... -
Polymer failure modeled by Molecular Dynamics
(Master thesis, 2014)This thesis is written as a mandatory part of the master degree program Materials Science and Engineering at NTNU, spring 2014. This thesis has been done for the Departement of Engineering Design and Materials.Molecular ... -
Effect of crystallographic orientation in textured Baa0.92Ca0.08TiO3 piezoelectric materials
(Journal article; Peer reviewed, 2014)Strongly textured lead-free Ba0.92Ca0.08TiO3 piezoelectric ceramics were fabricated by tape casting and templated grain growth. Dense ceramics with both favorable and unfavorable texture were successfully prepared. Enhanced ... -
Retrieval of three-dimensional spatial information from fast in situ two-dimensional synchrotron radiography of solidification microstructure evolution
(Journal article; Peer reviewed, 2014)In situ synchrotron X-ray radiography of columnar dendritic growth in Al–15 wt.% Cu–9 wt.% Si–0.015 wt.% Sr alloy has been carried out with the temporal and spatial resolutions of 100 ms and 0.65 μm, respectively. ... -
Nanomaterialer for kjemisk oksygenlagring
(Master thesis, 2014)Faserene nanokrystalline pulvere av heksagonal RMnO3, hvor R er Y eller Dy, ble syntetisert med en våt-kjemisk syntesemetode , og prøvene ble varmebehandlet ved forskjellige temperaturer for å oppnå varierende krystallit ... -
Electrolytic Removal of Chloride from Acidic Nitrate Solutions
(Master thesis, 2014)Chloride containing ores are among other things often used as the raw material in metal electrowinning from aqueous solutions. The dissolution of this ore may cause problems as chlorine gas will be evolved either as a side ... -
Stability of Conductive Carbon Additives for High-voltage Li-ion Battery Cathodes
(Master thesis, 2014)Conductive carbon additives are important constituents of the current state-of-the-art Li-ion battery cathodes, as the traditional active cathode materials are characterized by too low electronic conductivities. In ... -
Thermal Dependence of Shear Banding in Zr70Ni16Cu6Al8 Bulk Metallic Glasses
(Master thesis, 2014)Zr70Ni16Cu6Al8 bulk metallic glass samples were cast and prepared for tensiletesting. Tensile tests were done at temperatures 77 K, 150 K and 295K, over a range of effective strain rates between 10−5 and 10−1/s in order ... -
QUANTITATIVE MINERALOGY OF HIGH PURITY QUARTZ, CASE OF SPRUCE PINE, NORTH CAROLINA
(Master thesis, 2014)High Purity Quartz is one of the important minerals in the electronic industry today, but production of extreme high purity quartz requires a detailed knowledge of the resource from mine to the processing plant. To achieve ... -
The effect of Zr and V on the structural and mechanical properties of the 2618 Al alloy
(Master thesis, 2014)During the last decades, the use of aluminium components for automotive applications has continuously increased. The main reason for this success is the high strength-to-weight ratio which characterizes these alloys, and ... -
Boron Removal from Silicon Melts by H2O/H2 Gas Blowing: Mass Transfer in Gas and Melt
(Journal article; Peer reviewed, 2014)Metallurgical routes for solar grade silicon production are being developed as alternatives to chemical processes for their potential to achieve cost reductions, increased production volume, and reduced environmental and ... -
The effect of additives on the properties of lightweight aggregates produced from clay
(Journal article; Peer reviewed, 2014)In an attempt to improve the properties, lightweight aggregates were produced from clay with the addition of Na2CO3, SiO2, Fe2O3, and Fe in quantities between 2 and 10 wt% and examined with respect to strength, density and ... -
The Susceptibility to Hydrogen Induced Stress Cracking for Alloy 718 and Alloy 725
(Master thesis, 2014)The Hydrogen Induced Stress Cracking (HISC) susceptibility of Alloy 718 and Alloy 725 where examined and compared. Pre-charged samples of each alloy where stepwise loaded during polarization in Cortest Proof rings. A safe ... -
Nano- porous proppants for shale oil and gas production
(Master thesis, 2014)Over the last decade a rapid increase in utilization of unconventional reservoirs ha occurred due to advances in horizontal drilling and multi-stage fracturing technology. Reservoirs that earlier were far beyond commercial ... -
Implementation and Testing of Numerical Models for Evolution of Microchemistry and Microstructure During Back-Annealing of Aluminium Alloys
(Master thesis, 2014)Precipal and Alsoft are two separate models for simulating the effects of back-annealing on microchemistry and microstructure, respectively, in AA3xxx-type aluminium alloys (i.e Mn containing alloys). The precipitation ...