Blar i NTNU Open på forfatter "Arnberg, Lars"
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Interfacial Microstructure Formation in Al7SiMg/Cu Compound Castings
Bakke, Aina Opsal; Løland, Jan-Ove; Jørgensen, Svein; Kvinge, Jan; Arnberg, Lars; Li, Yanjun (Peer reviewed; Journal article, 2020)Compound casting is an attractive approach to create multi-material components and thus reduce the overall weight, while maintaining both the functional and mechanical properties. In this work, Al7SiMg alloy/copper compound ... -
Investigating thermal donors in n-type Cz silicon with carrier density imaging
Hu, Yu; Schøn, Hendrik; Øvrelid, Eivind Johannes; Nielsen, Øyvind; Arnberg, Lars (Journal article; Peer reviewed, 2012)A new method to map the thermal donor concentration in silicon wafers using carrier density imaging is presented. A map of the thermal donor concentration is extracted with high resolution from free carrier density images ... -
Kinetics of silicon nitride coatings degradation and its influence on liquid infiltration in PV silicon crystallization processes
Hendawi, Rania Tayseer; Ciftja, Arjan; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2021)Safe implementation of reusable crucibles in the silicon PV industry requires a thorough understanding of the reactions in the system to avoid liquid infiltration and crucible failure at high temperatures. Typically, an ... -
Methodology to analyse small silicon samples by glow discharge mass spectroscopy using thin wafer mask
Modanese, Chiara; Arnberg, Lars; Di Sabatino, Marisa (Peer reviewed; Journal article, 2015)Glow discharge mass spectrometry (GDMS) is widely used for trace element analysis of bulk solid samples. Thegeometry of the GD source limits the minimum size of the sample, which for the instrument used in this ... -
Microstructure and electrical properties of multi- crystalline silicon ingots made in silicon nitride crucibles
Hendawi, Rania; Søndenå, Rune; Ciftja, Arjan; Stokkan, Gaute; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2022)Silicon nitride is a more sustainable crucible material than silica, due to the larger potential for re-use. In this work, two directionally solidified high-performance multi-crystalline silicon (HPMC-Si) ingots have been ... -
Microstructure in A356/AA6xxx after bimetallic casting with flux coating
Bakke, Aina Opsal; Arnberg, Lars; Li, Yanjun (Journal article; Peer reviewed, 2019)This work focuses on bimetallic casting between A356 alloy melt and profiles of AA6xxx wrought aluminum alloys through a gravity casting process, with the aim to improve the component's mechanical properties. However, ... -
Nanostructured magnesium silicide Mg2Si and its electrochemical performance as an anode of a lithium ion battery
Sainudeen Nazer, Nazia; Denys, Roman Volodymyrovich; Andersen, Hanne Flåten; Arnberg, Lars; Yartys, Volodymyr (Journal article, 2017)Nano-crystalline Mg2Si (Mg67Si33) and its Si-rich eutectic (Mg47Si53) composition were synthesized by hydrogen desorption-recombination process, casting and rapid solidification techniques. The synthesis of Mg2Si meets ... -
Novel coatings for graphite materials in PV silicon applications: A study of the surface wettability and interface interactions
Hendawi, Rania Tayseer Atieh; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2021)Coatings are one of the promising techniques that can be applied to modify the surface properties and tailor the surface interactions with the surrounding. The development of conformable coatings for graphite materials can ... -
Nucleation and growth of multicrystalline silicon
Undheim, Espen (Doctoral theses at NTNU;2018:42, Doctoral thesis, 2018)This work has focused on the nucleation process of multicrystalline silicon (mc-Si) for photovoltaic (PV) applications during solidification in α-Si3N4 coated crucibles, the typical crucible coating used commercially. ... -
Nucleation of Primary Mg2Si in Al-Mg-Si Alloys
Grøstad, Torstein (Master thesis, 2014)Al-Mg2Si Metal Matrix Composites have the potential to replace the frequently used near- and hyper-eutectic Al-Si alloys. In the as-cast condition, these alloys can contain coarse dendritic primary Mg2Si particles which ... -
Orientation relationship between b-Si3N4 and Si in multicrystalline silicon ingots for PV applications
Undheim, Espen; Vullum, Per Erik; Holmestad, Randi; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Journal article; Peer reviewed, 2018)β-Si3N4 particles are thought to be nucleation sites for silicon in multicrystalline silicon (mc-Si) ingots for PV applications. The orientation relationship (OR) between Si and β-Si3N4 has been investigated by transmission ... -
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 ... -
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 ... -
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 ... -
Retrieval of three-dimensional spatial information from fast in situ two-dimensional synchrotron radiography of solidification microstructure evolution
Mirihanage, Wajira; Falch, Ken Vidar; Snigireva, Irina; Snigirev, A; Li, Yanjun; Arnberg, Lars; Mathiesen, Ragnvald (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. ... -
Severe reflux, sleep disturbances, and health-related quality of life after esophageal cancer surgery
Lagergren, Pernilla; Johar, Asif; Rosenlund, Helen; Arnberg, Lars; Haglund, Lena; Ness-Jensen, Eivind; Schandl, Anna (Journal article; Peer reviewed, 2021) -
Sn-Aided Joining of Cast Aluminum and Steel Through a Compound Casting Process
Bakke, Aina Opsal; Nordmark, Arne; Arnberg, Lars; Li, Yanjun (Peer reviewed; Journal article, 2021)Obtaining a strong bond between aluminum and steel is challenging due to poor wettability between aluminum melt and steel and brittle intermetallic phases forming in the interface. In this research, a novel coating method, ... -
Structure Control of Multicrystalline Silicon
Ekstrøm, Kai Erik (Doctoral thesis at NTNU;2016:65, Doctoral thesis, 2016)This work targets multiple approaches for controlling the initial growth conditions of directional solidification, and their effect on the final material microstructure and performance. Challenges related to both seeded ... -
Studying light-induced degradation by lifetime decay analysis: Excellent fit to solution of simple second-order rate equation
Nærland, Tine Uberg; Haug, Halvard; Angelskår, Hallvard; Søndenå, Rune; Marstein, Erik Stensrud; Arnberg, Lars (Journal article; Peer reviewed, 2013)Twenty different boron-doped Czochralski silicon materials have been analyzed for light-induced degradation. The carrier lifetime degradation was monitored by an automated quasi-steady-state photoconductance setup with an ... -
Tensile properties of Zr70Ni16Cu6Al8 BMG at room and cryogenic temperatures
Brennhaugen, David Dominikus Eide; Georgarakis, Konstantinos; Yokoyama, Yoshihiko; Nakayama, Koji S.; Arnberg, Lars; Aune, Ragnhild Elizabeth (Journal article; Peer reviewed, 2018)The mechanical behaviour in tension of a hypoeutectic Zr70Ni16Cu6Al8 Bulk Metallic Glass (BMG) was studied at room (295 K) and cryogenic temperatures (150 K and 77 K) using various strain rates between 10−4 and 10−1 s−1. ...