Blar i Institutt for materialteknologi på tittel
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Using Surplus Heat to Pre-Heat Carbon Anodes for Aluminium Electrolysis
(Master thesis, 2019)Karbon anoder brukes opp i Hall-Héroult prosessen og må erstattes regelmessig. Når en ny anode blir plassert i aluminiumsovnen, vil badet umiddelbart fryse på undersiden av anoden og danne et fryst isolerende lag. Denne ... -
Utherdbare bimetall materialer fremstilt ved skrueekstrudering: AA 6060/ren magnesium
(Master thesis, 2013)Skruekstrudering er en ny, innovativ prosess for å fremstille metaller. Prosessens store fortrinn er et relativt lav energiforbruk sammenliknet med tradisjonell ekstrudering, noe som i dagens energisamfunn er meget aktuelt. ... -
The Utilization of Bauxite Residue with a Calcite-Rich Bauxite Ore in the Pedersen Process for Iron and Alumina Extraction
(Peer reviewed; Journal article, 2021)Metallurgical grade alumina is produced worldwide through the well-known Bayer process, which unavoidably generates bauxite residue (BR, also known as red mud) in almost equal amounts to alumina. This study aims the ... -
Utilization of Recycled Concrete Fines for Carbon Capture and Subsequent Use as Supplementary Cementitious Material
(Master thesis, 2022)Betong är det vanligaste byggmaterialet i världen, men cementproduktionen står för 5-7 % av det totala CO2-utsläppet. [26] För att minska mängden CO2 från tillverkningen blandas ofta cement med mineraliskt tillsatsmaterial ... -
Utilization of waste heat for pre-heating of anodes
(Peer reviewed; Journal article, 2020)Carbon anodes are replaced on a regular basis in Hall–Héroult cells as they are consumed by electrochemical reactions. Upon insertion of new anodes, bath will freeze locally as a result of low bath superheat and comparatively ... -
Utlekking av kjemikalier fra plastprodukter i vann
(Bachelor thesis, 2021)I dagens samfunn er marin plastforsøpling blitt et økende problem og det er mye usikkerhet rundt hva slags miljøkonsekvenser dette medfører. Et komplett plastprodukt blir tilført karakteristiske kjemikalier, med den hensikt ... -
Utmatting av AA6005 - Effekten av forskjellige tilstander
(Master thesis, 2016)The aim of this thesis is to investigate the effect of ageing, both natural and artificial, at room temperature on the fatigue properties of AA6005. Artificial ageing was done to reach a temper state of equal hardness on ... -
Utvikling av metode for bråkjøling i SEM og in situ EBSD-karakterisering av fasetransformasjoner i F 70 stål.
(Master thesis, 2012)Fasetransformasjoner som skjer ved sveising av F 70 arktisk stål fører til at ugunstige mikrostrukturer oppstår i den varmepåvirkede sonen av grunnmaterialet (HAZ). Ved gjentatt oppvarming av HAZ vil det kunne dannes områder ... -
Utvikling av metode for produksjon av cellulære mikrogranulater fra glassavfall
(Bachelor thesis, 2022)Formålet med oppgaven er å finne ett sett med prosessbetingelser for å ekspansjon av cellulære mikrogranulater i størrelsesområdet 20-90 μm i en vertikal ovn med en oppadgående gasstrøm. De cellulære mikrogranulatene skal ... -
Vacuum and Gas Refining of Silicon for Solar Cell Applications
(Doctoral theses at NTNU;2021:244, Doctoral thesis, 2021)In this research, the vacuum and gas refining for P and B removal from Si to reach solar grade silicon (SoG – Si) are studied. The vacuum refining process is modeled by applying the Hertz – Knudsen – Langmuir evaporation ... -
Vacuum evaporation of pure metals
(Journal article; Peer reviewed, 2013)Theories on the evaporation of pure substances are reviewed and applied to study vacuum evaporation of pure metals. It is shown that there is good agreement between different theories for weak evaporation, whereas there ... -
Vacuum refining of silicon at ultra-high temperatures
(Peer reviewed; Journal article, 2020)In the production of solar grade silicon (SoG-Si), Phosphorus (P) removal from Si is a challenge as it cannot be eliminated effectively by the final key directional solidification step in the value chain of the silicon ... -
Validation and comparison of irradiation models for bifacial solar systems in the Nordics
(Master thesis, 2022)Abstract will be available on 2024-06-08 -
Validation of an Agilent GC-MS System With a Polyarc-FID
(Bachelor thesis, 2021)Validering av en Agilent 8890 gasskromatograf (GC) med massespektrometer (MS), en polyarc-reaktor og flammeionisasjonsdetektor (FID) ble utført for oppdragsgiver, for å forsøke å oppnå en akkreditert metode for ... -
Valorization of aluminum dross with copper via high temperature melting to produce al-cu alloys
(Peer reviewed; Journal article, 2021)The valorization of aluminum dross for Al recovery was performed via its mixing with metallic copper to produce Al-Cu alloys. This approach was with the intention of establishing a new smelting process to treat the dross ... -
Valorization of SiMn Sludge for Production of Low-Phosphorus Ferroalloys
(Journal article; Peer reviewed, 2021)The sludge generated by wet scrubbing the off-gas from a silicomanganese plant in Norway represents a significant loss in silicon and manganese values. This work seeks to extract these values in the production of ferroalloys ... -
Van der Waals density functional study of the energetics of alkali metal intercalation in graphite
(Journal article; Peer reviewed, 2014)We report on the energetics of intercalation of lithium, sodium and potassium in graphite by density functional theory using recently developed van der Waals (vdW) density functionals. First stage intercalation compounds ... -
Vanadium Speciation in Petroleum Cokes for Anodes used in Aluminium Electrolysis
(Journal article, 2017)The expanding aluminium industry is facing challenges with availability in raw materials. A wider range of petroleum cokes are being taken into use, blurring the border between anode grade and fuel grade coke in anode ... -
Vapor–liquid equilibria data for 2-piperidineethanol and 1-(2-hydroxyethyl)pyrrolidine in aqueous solutions and a UNIQUAC model representation
(Peer reviewed; Journal article, 2022)This work reports equilibrium data for two amines, 2-piperidineethanol (2-PPE) and 1-(2-hydroxyethyl)pyrrolidine (1-(2HE)PRLD), and their aqueous solutions. The pressure, temperature, and composition data are used to ... -
Vapour Pressure of Bi above Bi-Ti Alloys by Transpiration Method
(Master thesis, 2017)Titanium is an attractive metal with wide-ranging applications due to its properties. Titanium is one of the most corrosion resistant metals with the highest strength-to-weight ratio. The only industrial production route ...