Browsing Institutt for materialteknologi by Author "Arnberg, Lars"
Now showing items 1-20 of 43
-
Achieving high-strength metallurgical bonding between A356 aluminum and copper through compound casting
Bakke, Aina Opsal; Arnberg, Lars; Li, Yanjun (Peer reviewed; Journal article, 2021)Due to stable surface oxides on the solid copper surface and the ease of forming Al2O3 films at the aluminum melt surface, it is difficult to achieve high-strength metallurgical bonding between the two materials through ... -
Bulk Metallic Glasses: Deformation and Design
Brennhaugen, David Dominikus Eide (Doctoral theses at NTNU;2019:43, Doctoral thesis, 2019)Bulk metallic glasses are a group of alloys with amorphous atomic structure. When these alloys cool sufficiently fast, the atoms will “freeze” in the chaotic structure of the melt, rather than form crystals like most metals. ... -
Ceramic Foam Filters (CFFs) for Aluminium Melt Filtration - Stability, Compression, and Performance
Bergin, Are (Doctoral theses at NTNU;2022:260, Doctoral thesis, 2022)During aluminium production, the molten aluminium will necessarily include a certain amount of impurities, including non-metallic inclusions, i.e., solid objects immersed in the melt. These inclusions are known to be ... -
Comparison of the electrochemical behavior of amorphous Zr55Cu30Ni5Al10, stainless steel (316LVM), and CoCrMo (F75) in simulated body fluid with and without addition of protein
Tabeshian, Ali; Persson, Dan; Arnberg, Lars; Aune, Ragnhild Elizabeth (Journal article; Peer reviewed, 2018)Electrochemical behavior of, and metal ion release from the bulk amorphous (glassy) Zr55Cu30Ni5Al10 alloy (Zr‐MG) was evaluated in simulated body fluid (phosphate buffer saline [PBS]), with and without additions of protein ... -
Compression Testing of Ceramic Foam Filters (CFFs) Submerged in Aluminium at Operating Temperature
Bergin, Are; Fritzsch, Robert; Akhtar, Shahid; Arnberg, Lars; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2021)Particles and inclusions are commonly removed from molten aluminium with the use of Ceramic Foam Filters (CFF). The mechanical properties of CFFs are of great importance not only during transportation, storage, and mounting, ... -
Copper in compensated p- and n-type Czochralski silicon: Diffusivity, influence on the majority charge carrier density and mobility
Gaspar, Guilherme Manuel Morais; Modanese, Chiara; Bernardis, Sarah; Enjalbert, N.; Arnberg, Lars; Dubois, S.; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2022)Copper contamination risks are present throughout the whole crystalline silicon solar cell process flow, namely during ingot growth processes using recycled feedstock, wafer sawing and metallisation. Copper is a fast-diffusing ... -
Effect of gas atmospheres on the interactions between liquid silicon and coated graphite substrates
Hendawi, Rania; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2022)Interactions between the gas atmosphere, liquid silicon, Si3N4 coating, and graphite are of great interest for photovoltaic silicon applications. However, previous studies focus more on the wetting of silicon on coated ... -
The effect of preliminary heat treatment on the durability of reaction bonded silicon nitride crucibles for solar cells applications
Hendawi, Rania Tayseer Atieh; Ciftja, Arjan; Stokkan, Gaute; Arnberg, Lars; Di Sabatino Lundberg, Marisa (Peer reviewed; Journal article, 2020)Silicon nitride crucibles have the potential to replace silica crucibles and reduce the cost of silicon crystallization because of their reusability potential. Till date, crucibles’ heat treatment before each use is a ... -
Effect of Vanadium on Grain Refinement of Aluminium
Johanson, Audun (Master thesis, 2013)Today, grain refinement of aluminium is effectively achieved by inoculation. The performance of the inoculants, as well as further growth restriction in the liquid metal, can be affected by alloy- elements and impurities. ... -
Evaluating the tensile properties of aluminum foundry alloys through reference castings - A review
Anilchandra, AR; Arnberg, Lars; Bonollo, Franco; Fiorese, Elena; Timelli, Giulio (Journal article; Peer reviewed, 2017)The tensile properties of an alloy can be exploited if detrimental defects and imperfections of the casting are minimized and the microstructural characteristics are optimized through several strategies that involve die ... -
Experimental and numerical modelling study on the nucleation and grain growth of inoculated aluminium alloys
Xu, Yijiang (Doctoral theses at NTNU;2017:343, Doctoral thesis, 2017)With the aim to achieve an in-depth understanding on the heterogeneous nucleation and grain growth behavior during solidification of inoculated aluminum alloys, an integrated study by in-situ X-radiography, numerical ... -
Experimental Study on the Chemical Stability of Phosphate Bonded Al2O3-based Ceramic Foam Filters (CFFs)
Bergin, Are; Voigt, Claudia; Fritzsch, Robert; Akhtar, Shahid; Arnberg, Lars; Aneziris, Christos G; Aune, Ragnhild Elizabeth (Peer reviewed; Journal article, 2021)Production of high-quality aluminum products requires an extensive melt treatment process, even more so with the increasing focus on recycling and sustainability. Filtration is a commonly used process segment for removal ... -
Formation and evolution of the interfacial structure in Al/steel compound castings during solidification and heat treatment
Bakke, Aina Opsal; Arnberg, Lars; Løland, Jan-Ove; Jørgensen, Svein; Kvinge, Jan; Li, Yanjun (Peer reviewed; Journal article, 2020)In this work, Al7SiMg/steel compound castings were produced through a low-pressure die casting process. All steel inserts were galvanized, where half of them were flux-coated to further improve the wettability and remove ... -
Grain Refinement of Commercial EC Grade 1370 Aluminium Alloy for Electrical Applications
Hassanabadi, Massoud; Akhtar, Shahid; Arnberg, Lars; Aune, Ragnhild E. (Journal article; Peer reviewed, 2018)The purpose of the present study was to investigate the effect of different grain refiners’ additions on structure and electrical conductivity of commercially electrically conductive (EC) grade 1370 aluminium alloy. A ... -
Heterogeneous nucleation and grain growth of inoculated aluminium alloys: An integrated study by in-situ X-radiography and numerical modelling
Xu, Yijiang; Casari, Daniele; Du, Qiang; Mathiesen, Ragnvald; Arnberg, Lars; Li, Yanjun (Journal article; Peer reviewed, 2017)A comprehensive study on the heterogeneous nucleation and grain growth of Al-10 wt.%Cu alloys inoculated with Al-5Ti-1B was carried out. To further reveal the solute segregation stifling mechanism, in-situ near-isothermal ... -
In operando neutron diffraction study of LaNdMgNi9H13 as a metal hydride battery anode
Nazer, N.S.; Denys, Roman Volodymyrovich; Yartys, Volodymyr; Hu, Weikang; Latroche, M.; Cuevas, F; Hauback, Bjørn; Henry, P.F.; Arnberg, Lars (Journal article; Peer reviewed, 2017-03-01)La2MgNi9-related alloys are superior metal hydride battery anodes as compared to the commercial AB5 alloys. Nd-substituted La2-yNdyMgNi9 intermetallics are of particular interest because of increased diffusion rate of ... -
In situ investigation of spinodal decomposition in hypermonotectic Al–Bi and Al–Bi–Zn alloys
Schaffer, Paul; Mathiesen, Ragnvald; Arnberg, Lars; Di Sabatino, Marisa; Snigirev, Anatoly (Journal article; Peer reviewed, 2008)Spinodal decomposition of hypermonotectic Al–6 wt.%Bi, Al–8 wt.%Bi and Al–6 wt.%Bi–8 wt.%Zn alloys has been investigated using synchrotron radiography. In the case of the 6 and 8 wt.%Bi binary alloys undercoolings of ... -
In-situ studies of multicrystalline silicon nucleation and growth on alpha- and beta-Si3N4 coated substrates
Undheim, Espen; Maeda, Kensaku; Arnberg, Lars; Holmestad, Randi; Fujiwara, Kozo; Di Sabatino Lundberg, Marisa (Journal article; Peer reviewed, 2018)The growth of silicon on various nitride coated quartz substrates were studied using in-situ observation of the solidification process. Three different coating types were used: One consisting entirely of α-Si3N4 particles, ... -
Interfacial microstructure formation in A356/steel compound castings using metal coating
Bakke, Aina Opsal; Nordmark, Arne; Arnberg, Lars; Li, Yanjun (Peer reviewed; Journal article, 2020)Compound castings between aluminum and steel have great potential for applications in the automotive industry. However, due to large differences in thermal and mechanical properties between steel and aluminum, and the ... -
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 ...