Blar i Institutt for materialteknologi på tittel
Viser treff 1716-1735 av 2519
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Performance Study of MXene/Carbon Nanotube Composites for Current Collector- and Binder-Free Mg-S Batteries
(Peer reviewed; Journal article, 2021)The realization of sustainable and cheap Mg-S batteries depends on significant improvements in cycling stability. Building on the immense research on cathode optimization from Li-S batteries, for the first time a beneficial ... -
Permanent Effect of a Cryogenic Spill on Fracture Properties of Carbon Steel
(Master thesis, 2015)In this work, the permanent effect of a cryogenic spill on the fracture properties of carbon steel was investigated. The experimental work consisted of two main parts. The first part was the examination of a plate of ... -
Permanent effect of a cryogenic spill on fracture properties of structural steels
(Journal article; Peer reviewed, 2015)Fracture analysis of a standard construction steel platform deck, which had been exposed to a liquid nitrogen spill, showed that the brittle fracture started at a flaw in the weld as a consequence of low-temperature ... -
Permeation and Stability Properties of Asymmetric and Disk Shaped Oxygen Permeable Membranes Intended for Syn-Gas Production
(Master thesis, 2012)In this study, the oxygen permeation and stability properties of disk shaped and asymmetric membranes, both of the composition La0.2Sr0.8Fe0.8Al0.2O3-δ were investigated. Strontium doped Lanthanum ferrite is an oxygen ... -
PFC evolution characteristics during aluminium and rare earth electrolysis
(Journal article; Peer reviewed, 2018)In addition to aluminium electrolysis, the electrolysis of rare earth (RE) metals from fluoride melts is a significant source of perfluorocarbon (PFC) emissions to the atmosphere. These processes have many similarities, ... -
PFC Evolution in the Aluminium Production Process
(Doctoral theses at NTNU;2017:137, Doctoral thesis, 2017)Improvements in the Hall-Héroult process for electrowinning of aluminium have drastically reduced the anode effect duration, frequency and its associated perfluorocarbon (PFC) evolution, especially over the past 50 years. ... -
pH-dependence of chloride binding in ordinary Portland cement
(Master thesis, 2018)A new method for artificially leaching hydrated cement paste and studying how lowered pH in the pore solution affects chloride binding has been developed. Hydrated cement paste was exposed to a NaCl-solution before being ... -
Phase composition, microstructure and resistance to attrition of alumina-based supports for Fischer-Tropsch catalysts
(Doktoravhandlinger ved NTNU, 1503-8181; 2012:43, Doctoral thesis, 2012)The key element in gas-to-liquid technology is the Fischer-Tropsch (FT) synthesis in which liquid hydrocarbons are produced from syngas (CO and H2). During FT synthesis the catalyst and the catalyst support are subjected ... -
Phase Distribution During Slag Formation in Mn Ferroalloy Production
(Peer reviewed; Journal article, 2022)Phase development during slag formation and reduction of Comilog and Assmang ores in a setup that simulates the conditions in an industrial SAF process under different coke bed temperatures, 1473 K (1200 °C), 1673 K (1400 ... -
Phase relations and thermomechanical properties of (Gd2Zr2O7)1-x(YbSZ)x based thermal barrier coatings (0 ≤x≤ 0.98)
(Peer reviewed; Journal article, 2021)Doped Gd2Zr2O7 materials have interesting properties as thermal barrier coatings (TBC) to replace the YSZ topcoats traditionally used. Here we investigate the thermomechanical properties and phase relations of Gd2Zr2O7 ... -
Phase Relations in Ferromanganese Production During Prereduction: South African Ores
(Peer reviewed; Journal article, 2019)In the steel industry, ferromanganese is an important additive. During the production of ferromanganese the ore goes through prereduction and reduction. The prereduction step is very important, as the degree of reduction ... -
Phase Stability and Point Defects in InMnO3
(Master thesis, 2014)During the last decade hexagonal manganites (h-RMNO3) have been a widely researched topic. This is mainly due to their multiferroic property that makes them a potential material for use in future electronics, data storage ... -
Phase transformation in quartz at elevated temperatures
(Peer reviewed; Journal article, 2021)Natural quartz is a raw material in Si production. During heating, it will go through a series of phase transformations before melting in the furnace, from quartz to an intermediate amorphous phase and further to cristobalite. ... -
Phase Transformation Study of X70 Steel by EBSD during In Situ Heating and Quenching
(Master thesis, 2012)Arctic steels, like the API X70 steel explored in this master thesis, are developed to withstand very low temperatures, with a ductile/brittle transition temperature below −60◦C. However, during welding, brittle phases ... -
Phase transformations and thermal degradation in industrial quartz
(Doctoral theses at NTNU;2020:205, Doctoral thesis, 2020)Quartz is used as the silicon source for silicon and ferrosilicon production. Together with various carbon materials, the quartz is added to a submerged arc furnace. Energy is supplied through three carbon electrodes, which ... -
Phase Transformations from Quartz to Cristobalite
(The Minerals, Metals & Materials Series;, Chapter, 2018)Two quartz types used in the silicon and ferrosilicon industry were heated to temperatures of 1600 and 1700 °C. The parameters varied were the temperature and the holding time at maximum temperature. The amount of quartz, ... -
Phase transformations in quartz used in silicon and ferrosilicon
(Peer reviewed; Journal article, 2021)Different quartz types are used as raw material for silicon and ferrosilicon production. Upon heating, the quartz will experience phase transformations to other silica polymorphs. In this study the phase transformation ... -
Phase Transitions and Microstructural Changes During Oxidation and Reduction of a Weathered Ilmenite Concentrate
(Peer reviewed; Journal article, 2021)The present work aims to investigate the link between the oxidation and reduction of a weathered ilmenite concentrate in terms of phase transitions, microstructural changes, and element distribution. An ilmenite concentrate ... -
Phases and Zones in the Silicon Process
(Master thesis, 2016)Different zones and materials formed during the production of silicon in a silicon furnace has been examined in this thesis. Samples from two industrial scale silicon furnaces have been have been studied. The excavations ... -
Phosphorus modification in Al-Si hypereutectic alloys
(Master thesis, 2016)We wanted to know how the primary silicon is influeced by the modification with phoshorus. Some analysis with light microscope were done in order to see how the particles change with the phosphorus modification. Also the ...