Blar i NTNU Open på forfatter "Aune, Ragnhild Elizabeth"
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Investigation on scale formation in aluminium industry by means of a cold-finger
Clos, Daniel Perez; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth (Journal article; Peer reviewed, 2019)A cylindrical fouling probe or “cold-finger” has been used to investigate fouling from aluminium production off-gas. The probe was located upstream from the off-gas cleaning system. Surface deposits have been collected for ... -
Leaching and Modelling of LIB Black Mass (BM) for Metal Recovery
Olsen, Amalie My (Master thesis, 2022)På grunn av el-bilmarkedets eksponentielle vekst blir et stort antall Li-Ion-batterier (LIB-er) introdusert i samfunnet. Både essensielle råvarer og potensielt skadelige kjemikalier finnes i disse batteriene, og de etablerte ... -
Material Sustainability and Patient’s Experiences of Silver Tracheostomy Tubes-An In-Vitro and In-Vivo Case Study
Björling, Gunilla; Blomgren, Minoo; Frostell, Claes; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2021)Introduction: Tracheostomy tubes are used for enabling a free airway for patients with respiratory failures. In trachea, tracheostomy tubes are exposed to the alkaline tracheal secretion and lining fluid containing proteins, ... -
Optimization of Hemocompatible Thin Film Coatings for Biomedical Applications
Kjørholt, Kari Ravnestad (Master thesis, 2021)Bruken av biomedisinsk utstyr har gitt store fordeler til den menneskelige befolkningen i tiårene siden det vitenskapelige feltet først ble utviklet. Bio- og hemokompatibiliteten til eksisterende utstyr burde derimot ... -
Overview of the Possibilities and Limitations of the Characterization of Ceramic Foam Filters for Metal Melt Filtration
Voigt, Claudia; Hubálková, Jana; Bergin, Are; Fritzsch, Robert; Aune, Ragnhild Elizabeth; Aneziris, Christos G. (Journal article; Peer reviewed, 2021)The filtration of molten metal using ceramic foam filters (CFF) is a purification method often used by the aluminum industry to meet the increasing demands the melt quality. CFFs are in most cases produced by the replica ... -
PARAMETRIC OPTIMISATION OF FRICTION STIR WELDING ON ALUMINIUM ALLOY (EN AW-1100) PLATES
Awan, Muhammad Umer Farooq; Khan, Mahmud Tareq Hassan; Waheed, Khalid; Iqbal, Zafar; Rehman, Abdul; Ali, Fahad; Shahzad, Muhammad; Saim, Muhammad Abdul Basit; Akhtar, Shahid; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2023)Friction stir welding is a solid-state welding process used extensively for aluminium alloys. EN AW-1100 alloy is mostly used for its exceptional corrosion resistance, high ductility, high thermal and electrical conductivities, ... -
Particle deposition characteristics in the formation of Hard Grey Scale (HGS) on cold surfaces exposed to aluminium production off-gas
Clos, Daniel Perez; Zedel, Hannes; Johnsen, Sverre Gullikstad; Nekså, Petter; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2021)Hard Grey Scale (HGS) is a hard and strongly adhering fouling material that forms on solid surfaces impinged by the off-gas generated in the pot cells of aluminium production plants. Different theories on HGS formation ... -
Performance of Regular and Modified Ceramic Foam Filters (CFFs) during Aluminium Melt Filtration in a Pilot-Scale Setup
Bergin, Are; Voigt, Claudia; Fritzsch, Robert; Akhtar, Shahid; Arnberg, Lars; Aneziris, Christos G; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2022)Liquid metal filtration through a ceramic medium has proven to be an efficient way to secure the removal of inclusions and bifilms from molten aluminium. With an increasing focus on recycling of metal values throughout the ... -
Physical and Mechanical Properties of Graphene Nanoplatelets Reinforced Al6061-T6 Composites processed by Spark Plasma Sintering
Khan, Mahmood; Ud-Din, Rafi; Wadood, Abdul; Husain, Syed Wilayat; Akhtar, Shahid; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2020)Aluminium matrix composites with high specific strength are attracting attention for use in automobile and aerospace applications. Graphene nanoplatelets (GNPs) were added in 0.1, 0.5, and 1 weight fractions to an Al6061 ... -
Predictive modeling of glass forming ability in the Fe-Nb-B system using the CALPHAD approach
Brennhaugen, David Dominikus Eide; Mao, Huahai; Louzguine-Luzgin, Dmitri V.; Arnberg, Lars; Aune, Ragnhild Elizabeth (Journal article, 2017)Accurate values needed for the most commonly used indicators of good Glass Forming Ability (GFA) in alloys, i.e. the liquidus (Tl), crystallization (Tx) and glass transition (Tg) temperatures, are only available after ... -
Preliminary Experimental Study of the Thermal Stability and Chemical Reactivity of the Phosphate-Based Binder used in Al2O3-Based Ceramic Foam Filters (CFFs)
Solem, Cathrine Kyung Won; Fritzsch, Robert; Aune, Ragnhild Elizabeth (Journal article; Peer reviewed, 2018)Filtration of liquid aluminium is widely used in the industry for the removal of inclusions, and Ceramic Foam Filters (CFFs) are often the filtration media of choice. It is known that PH3 (phosphine) can be released from ... -
Preparation and Characterization of Spherical Nickel Silicide Powder by Inductively Coupled Plasma Spheroidization for Additive Manufacturing
Tareq, Foysal Kabir; Aune, Ragnhild Elizabeth; Grasmo, Geir; Akhtar, Naureen; Sætre, Tor Oskar (Chapter, 2022)Metal alloy powder with spherical-shaped morphology, high flowability, and packing density is the main requirements for metal-based additive manufacturing (AM). Among metal alloys, nickel silicide is considered as a potential ... -
Probing heat generation during tensile plastic deformation of a bulk metallic glass at cryogenic temperature
Brennhaugen, David Dominikus Eide; Georgarakis, Konstantinos; Yokoyama, Yoshihiko; Nakayama, Koji S.; Arnberg, Lars; Aune, Ragnhild Elizabeth (Journal article; Peer reviewed, 2018)Despite significant research efforts, the deformation and failure mechanisms of metallic glasses remain not well understood. In the absence of periodic structure, these materials typically deform in highly localized, thin ... -
Pyrometallurgical Treatment of Apatite Concentrate with the Objective of Rare Earth Element Extraction: Part I
Tianming, Sun; Kennedy, Mark William; Yurramendi, Lourdes; Aldana, Jose; Del Rio, Carmen; Arnout, Sander; Tranell, Gabriella; Aune, Ragnhild Elizabeth (Journal article, 2017)Apatite, Ca5(PO4)3F, concentrate from LKAB in Kiruna, Sweden, has been characterized and pyrometallurgically treated using (i) silicon metal and fluxes to extract phosphorus and transition metals at 1600 °C (Part I ... -
Pyrometallurgical Treatment of Apatite Concentrate with the Objective of Rare Earth Element Recovery: Part II
Kennedy, Mark William; Tianming, Sun; Yurramendi, Lourdes; Arnout, Sander; Aune, Ragnhild Elizabeth; Tranell, Gabriella (Journal article, 2017)Apatite, Ca5(PO4)3F, is a useful raw material for the production of both elemental phosphorus and phosphoric acid, and the mine tailings present at Luossavaara-Kiirunavaara AB (LKAB) in Kiruna, Sweden, represent a significant ... -
Quality of Cancer Care in Tanzania as Experienced by Patients: A Qualitative Study
Kidayi, Paulo L.; Manhica, Hélio; Mtuya, Christina C.; Mahande, Michael Johnson; Furaha, Serventi; Aune, Ragnhild Elizabeth; Björling, Gunilla (Peer reviewed; Journal article, 2023)Introduction Cancer is a disease of public importance in Tanzania. Considering a limited health care system with few cancer centers and low health literacy in general, people are diagnosed at late stage and face difficulties ... -
Quality Of Life in Children With Home Mechanical Ventilation – A Scoping Review
Mattson, Janet; Lunnelie, Johan; Löfholm, Tim; Andersson, Elina Scheers; Aune, Ragnhild Elizabeth; Björling, Gunilla (Peer reviewed; Journal article, 2022)Introduction Home mechanical ventilation is an established method to support children suffering from chronic respiratory insufficiency, still more research is needed regarding mechanically ventilated children's and ... -
Reduction of commercial hematite pellet in isothermal fixed bed-experiments and numerical modelling
Beheshti, Reza; Moosberg-Bustnes, John Are; Kennedy, Mark William; Aune, Ragnhild Elizabeth (Journal article; Peer reviewed, 2016)In the present work, fixed bed reduction experiments were conducted at 1173 K over a range of H2/CO ratios from 0.8 to 2.0 and subsequently modelled numerically. The model consists of two one-dimensional, isothermal and ... -
Sampling Procedure, Characterization, and Quantitative Analyses of Industrial Aluminum White Dross
Solem, Cathrine Kyung Won; Deledda, Stefano; Tranell, Gabriella; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2022)Up to 10% of all metallic aluminum (Al) produced is lost due to dross generation during production. It also causes an environmental problem due to hazardous waste generation following treatment, as well as toxic gas ... -
Short- and Long-Term Aluminum Filtration Trials with Carbon-Bonded Alumina Filters
Voigt, Claudia; Hubálková, Jana; Bergin, Are; Fritzsch, Robert; Akhtar, Shahid; Aune, Ragnhild Elizabeth; Aneziris, Christos G (Peer reviewed; Journal article, 2022)In the present study, carbon-bonded alumina filters, normally used for the filtration of steel melts, have been investigated as a potential filter material for the filtration of aluminum. Short- and long-term pilot-scale ...