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Browsing NTNU Open by Author "Torgersen, Jan"

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Now showing items 1-20 of 83

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    • 3D Printing and Carbonization of High Performing Polyimide Formulations 

      Cappelen, Fredrik (Master thesis, 2019)
      Stereolitografisk 3D-printing (SLA) er en moden form for additiv tilvirkning, og blir i økende grad brukt til produksjon av deler som inngår i et ferdig produkt. I denne oppgaven utforskes muligheten for å bruke SLA til ...
    • 40CrMoV13.9 notched specimens under multiaxial fatigue: An overview of recent results 

      Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo; Welo, Torgeir (Journal article; Peer reviewed, 2017)
      The multiaxial fatigue strength of circumferentially V-notched and semicircular notched specimens made of 40CrMoV13.9 has been investigated in this paper. The multiaxial load were applied using combined tension and torsion ...
    • A novel approach for assessing the fatigue behavior of PEEK in a physiologically relevant environment 

      Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2018)
      In recent years, the need of surgical procedures has continuously increased and, therefore, researchers and clinicians are broadly focusing on the development of new biocompatible materials. Among them, polyetheretherketone ...
    • Advancing Additive Manufacturing Technology for Production 

      Strømsnes, Stig (Master thesis, 2018)
      In this master s thesis we consider three different areas of research in the advancement of AM technology for production environments: In the first we assembled and made a case for the use of a SLA/ DLP 3D-printer at our ...
    • ALD Zn(O,S) Thin Films’ Interfacial Chemical and Structural Configuration Probed by XAS 

      Dadlani, Anup; Acharya, Shinjita; Trejo, Orlando; Fritz, Prinz; Torgersen, Jan (Journal article; Peer reviewed, 2016)
      The ability to precisely control interfaces of atomic layer deposited (ALD) zinc oxysulfide (Zn(O,S)) buffer layers to other layers allows precise tuning of solar cell performance. The O K- and S K-edge X-ray absorption ...
    • Assessment of tensile and fatigue behavior of PEEK specimens in a physiologically relevant environment 

      Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2019)
      In the last decades the necessity of implant devices is continuously increasing. The researchers have thus focused their attentions on the development of new biocompatible materials, in particular polymers. Among them, ...
    • Atomic layer deposition by reaction of molecular oxygen with tetrakisdimethylamido-metal precursors 

      Provine, J; Schindler, Peter; Torgersen, Jan; Hyo Jin, Kim; Karnthaler, Hans-Peter; Prinz, Fritz (Journal article; Peer reviewed, 2016)
      Tetrakisdimethylamido (TDMA) based precursors are commonly used to deposit metal oxides such as TiO2, ZrO2, and HfO2 by means of chemical vapor deposition and atomic layer deposition (ALD). Both thermal and plasma enhanced ...
    • Beyond the 2D limit: étendue-squeezing line-focus solar concentrators 

      Johnsen, Håkon Jarand Dugstad; Aksnes, Astrid; Torgersen, Jan (Peer reviewed; Journal article, 2020)
      Line-focus solar concentrators are commonly designed by extruding a two-dimensional concentrator in the third dimension. For concentration in air, these concentrators are, by the nature of their design, limited by the ...
    • Biocorrosion Resistance of Mg AZ31 alloy Nanocoated with ZrO2, HfO2 and TiO2 by Atomic Layer Deposition Method 

      Bjelland, Maria (Master thesis, 2019)
      Magnesiumlegeringer med sin utmerkede kombinasjon av mekaniske egenskaper og biokompatibilitet, gjør dem egnet for biomedisinske implantater. Imidlertid begrenser deres høye korrosjonsrate i menneskekroppsmiljøet deres ...
    • Bottom-Up Fabrication of Oxygen Reduction Electrodes with Atomic Layer Deposition for High-Power-Density PEMFCs 

      Dull, Sam; Xu, Shicheng; Goh, Timothy; Lee, Dong Un; Higgins, Drew; Orazov, Marat; Koshy, David; Vullum, Per Erik; Kirsch, Sebastian; Huebner, Gerold; Torgersen, Jan; Jaramillo, Thomas F; Prinz, Friedrich (Journal article, 2021)
      As the platinum (Pt) loading in proton exchange membrane fuel cell cathodes is driven down to reduce costs, catalyst utilization becomes increasingly important. Here, we report an atomic layer deposition-facilitated electrode ...
    • Brake Caliper Design for a Formula Student Race Car - On Behalf of Revolve NTNU 

      Vasseljen, Brage (Master thesis, 2018)
      With the large amount of dynamic loads and heat the brake system of a Formula Student race car experiences, the system requires resistance to both heat and external loads in several of its components. The brake caliper, ...
    • Comparing physiologically relevant corrosion performances of Mg AZ31 alloy protected by ALD and sputter coated TiO2 

      Peron, Mirco; Bin Afif, Abdulla Shaikh Abdul Qader; Dadlani, Anup; Berto, Filippo; Torgersen, Jan (Peer reviewed; Journal article, 2020)
      The utilization of Mg alloys for biomedical applications is so far underexplored due to the accelerated corrosion hampering patient recovery post implantation. Here, we explore the effectiveness of corrosion reduction of ...
    • A Comparison Between Topology Optimized and Conventionally Designed Titanium Uprights - On Behalf of Revolve NTNU 

      Herstad, Thomas (Master thesis, 2018)
      This thesis covers the design and manufacturing of uprights for Revolve NTNU's 2018 Formula Student car, Atmos. Four titanium uprights have been designed using topology optimization, and produced using additive manufacturing ...
    • Conductivity control via minimally invasive anti-Frenkel defects in a functional oxide 

      Evans, Donald; Holstad, Theodor Secanell; Mosberg, Aleksander Buseth; Småbråten, Didrik Rene; Vullum, Per Erik; Dadlani, Anup; Shapovalov, Konstantin; Yan, Zewu; Bourret, Edith; Gao, David Zhe; Akola, Jaakko; Torgersen, Jan; Van Helvoort, Antonius; Selbach, Sverre Magnus; Meier, Dennis (Peer reviewed; Journal article, 2020)
      Utilizing quantum effects in complex oxides, such as magnetism, multiferroicity and superconductivity, requires atomic-level control of the material’s structure and composition. In contrast, the continuous conductivity ...
    • Creep behavior of v-notched components 

      Gallo, P; Razavi, Seyed Mohammed Javad; Peron, Mirco; Torgersen, Jan; Berto, Filippo (Journal article; Peer reviewed, 2017)
      Geometrical discontinues such as notches play a significant rule in structural integrity of the components, especially when the component is subjected to very severe conditions, such as the high temperature fatigue or ...
    • Designing next generation hydraulic manifolds with minimal material usage and competitive lead times 

      Hersleth, Henrik Hoen (Master thesis, 2020)
      Denne oppgaven kartlegger designprosessen til en hydraulisk manifold ved bruk av etmanifold design program utviklet av Thomas Røkke og Henrik Hoen Hersleth. Program-met bruker A-star algoritmen for ̊a designe ...
    • Development of Hybrid Aluminum Carbon Fiber Composite Wheels for a Formula Style Race Car 

      Oldeide, Christer Kobbevik (Master thesis, 2017)
      Modern short product life cycles and the necessity to rapidly manufacture components with minimal production needs poses stringent requirements on both time and sophistication of modern product design. Light weight components ...
    • Differentiation and Bone Deposition of Bone Marrow Derived Stem Cells on Additive Manufactured Porous Ti-6Al-4V Scaffolds 

      Jøraholmen, Timothy (Master thesis, 2017)
      The number of arthroplasty surgeries, or joint replacing surgeries, being performed each year is increasing worldwide. Younger patients are also being increasingly introduced to this kind of surgery, which means that the ...
    • Direct Integration of Strained-Pt Catalysts into Proton-Exchange-Membrane Fuel Cells with Atomic Layer Deposition 

      Xu, Shicheng; Wang, Zhaoxuan; Dull, Sam; Liu, Yunzhi; Lee, Dong Un; Pacheco, Lezama; Orazov, Marat; Vullum, Per Erik; Dadlani, Anup; Vinogradova, Olga; Schindler, Peter; Tam, Qizhan; Schladt, Thomas; Mueller, Jonathan E.; Kirsch, Sebastian; Huebner, Gerold; Higgins, Drew; Torgersen, Jan; Viswanathan, Venkatasubramanian; Jaramillo, Thomas F; Prinz, Friedrich (Peer reviewed; Journal article, 2021)
      The design and fabrication of lattice-strained platinum catalysts achieved by removing a soluble core from a platinum shell synthesized via atomic layer deposition, is reported. The remarkable catalytic performance for the ...
    • Dynamic and Process Dependent Integrity Investigations of a Topology Optimized Additive Manufactured AlSi10Mg Upright 

      Skoglund, Truls Mentzoni (Master thesis, 2019)
      Additiv tilvirkning muliggjør for tilvirkning av komponenter med organisk geometri. Kombinert med strukturell optimalisering, kan nye komponenter med lav vekt optimalisert for å takle spesifikke lastsitasjoner produseres. ...

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