Synchrotron Radiation Applications in the Siberian Synchrotron and Terahertz Radiation Center
Publication date: 2016 Source:Physics Procedia, Volume 84 Author(s): K. Zolotarev, G. Kulipanov, E. Levichev, N. Mezentsev, V. Pindyurin, P. Piminov, B. Tolochko The Siberian Synchrotron and Terahertz Radiation Center (SSTRC, Budker Institute of Nuclear Physics (INP), Novosibirsk, Russian Federation) is one of the oldest and main Russian centers for synchrotron radiation applications. The center combines research efforts of numerous scientific groups, mostly from institutes and universities of the Novosibirsk Scientific Center (Siberian Branch of the Russian Academy of Sciences) as well as researchers from all ove...
Source: Physics Procedia - December 12, 2016 Category: Physics Source Type: research
In Situ Analysis of Discharge Sound and I-V Characteristic on Gliding Arc Discharge for Nano Particle Preparation
Publication date: 2016 Source:Physics Procedia, Volume 85 Author(s): Shin-ichi Aoqui, Fumiaki Mitsugi, Yoshito Sonoda, Toshiyuki Nakamiya, Hiroharu Kawasaki Electrical and sound characteristics of gliding arc have been taken to analyze and discuss the discharge mechanism, which is very complex due to the plasma non-uniformity in space and time. This work focuses on the relationship between discharge current and sound during gliding arc discharge. Measurement and analysis of waveforms of applied voltage, discharge current and discharge sound were carried out. New technique of optical wave microphone was introduced to...
Source: Physics Procedia - December 10, 2016 Category: Physics Source Type: research
Thermal Behavior of Self-assembled Stearic Acid Monolayers on Sapphire Surface
Publication date: 2016 Source:Physics Procedia, Volume 85 Author(s): Shaowei Li, Yanjun Zheng, Zhiyuan Qi, Xinghui Li, Changfeng Chen A stearic acid self-assembled monolayer was fabricated by solution deposition on single-crystal C-plane (0001) aluminum oxide (sapphire). Thermal stability was investigated by atomic force microscopy (AFM), X-ray photoelectron spectroscopy(XPS), and contact angle(CA) measurements. The AFM results revealed that the surface coverage remains unchanged in air until the temperature reached ∼80°C, then decreases with further increasing of temperature and finally becomes zero at 220°C. I...
Source: Physics Procedia - December 10, 2016 Category: Physics Source Type: research
Precipitation Behavior of Plastically Deformed CuAgZr Alloy
In this study, the nature of Ag precipitate in Cu–7wt%Ag–0.05wt%Zr during thermal processing is characterized to understand the alloy microstructures and thus improve its mechanical strength and electrical conductivity. The solution treated CuAgZr alloy samples were cold rolled with logarithmic strain of 2.3 and subsequently aged at various times. The complementary small angle X-ray scattering (SAXS) and X-ray diffraction (XRD) techniques indicate the evolution of precipitate size during different thermal routines. The radius of gyration of precipitate estimated from SAXS measurement agrees with the measured size from ...
Source: Physics Procedia - December 10, 2016 Category: Physics Source Type: research
Effect of Pressure and Temperature on the Local Structure and Lattice Dynamics of Copper(II) Oxide
Publication date: 2016 Source:Physics Procedia, Volume 85 Author(s): A. Kuzmin, A. Anspoks, A. Kalinko, A. Rumjancevs, J. Timoshenko, L. Nataf, F. Baudelet, T. Irifune Microcrystalline and nanocrystalline (6 nm) CuO were studied in situ by the Cu K-edge X-ray absorption spectroscopy as a function of pressure (0-20 GPa) and temperature (10-300 K). Pressure dependence of X-ray absorption near edge structure (XANES) was interpreted within the full-multiple-scattering formalism based on the relaxed atomic structure determined by ab initio linear combination of atomic orbital (LCAO) calculations. Temperature dependenc...
Source: Physics Procedia - December 10, 2016 Category: Physics Source Type: research
Graphitization of Activated Carbons: A Molecular-level Investigation by INS, DRIFT, XRD and Raman Techniques
Publication date: 2016 Source:Physics Procedia, Volume 85 Author(s): Andrea Lazzarini, Andrea Piovano, Riccardo Pellegrini, Giovanni Agostini, Svemir Rudić, Carlo Lamberti, Elena Groppo The effect of a graphitization treatment on the phyisico-chemical properties of an activated carbon have been studied by means of multi-technical approach. Inelastic neutron scattering and DRIFT spectroscopy revealed the modifications occurring at the material borders, involving H-containing species and O-containing functional groups. Information on the structural modifications were obtained by means of Raman spectroscopy and X-Ra...
Source: Physics Procedia - December 10, 2016 Category: Physics Source Type: research
Initial Stages of the Growth of Mixed Iron-cobalt Oxides on Ru(0001)
Publication date: 2016 Source:Physics Procedia, Volume 85 Author(s): Laura Martín-García, Adrian Quesada, Lucas Pérez, Michael Foerster, Lucía Aballe, Juan de la Figuera Mixed iron-cobalt oxides have been grown on a Ru(0001) single crystal substrate by reactive molecular beam epitaxy. The growth has been followed by low-energy electron microscopy and diffraction. Chemical characterization has been performed by selected area x-ray absorption spectroscopy. As previously known, iron grows into a wetting layer of FeO. In contrast, cobalt grows into three-dimensional islands of CoO, of either with a (111) -most comm...
Source: Physics Procedia - December 10, 2016 Category: Physics Source Type: research
Resonant PhotoEmission Spectroscopy Investigation of Fe2O3 – TiO2 Heterojunctions for Solar Water Splitting
Publication date: 2016 Source:Physics Procedia, Volume 85 Author(s): Maxime Rioult, Dana Stanescu, Patrick Le Fèvre, Antoine Barbier, Hélène Magnan The implementation of semiconductor heterojunctions photo-anodes appears as a very promising way to improve the performances of devices for solar water splitting (sun light assisted hydrogen production from water). However, assembling different materials together results in the existence of interfaces which usually do not have the same electronic structure than the simply stacked individual layers. The electronic structure of the valence band being a key parameter for...
Source: Physics Procedia - December 10, 2016 Category: Physics Source Type: research
Sound Welding of Copper: Laser Beam Welding in Vacuum
Publication date: 2016 Source:Physics Procedia, Volume 83 Author(s): Uwe Reisgen, Simon Olschok, Stefan Jakobs, Christoph Turner Copper is one of the most important metals of modern times. The extensive usage from thin foils up to thick plates leads to a huge amount of welding applications. Basically the Laser Beam Welding is suited well for the welding of copper, because difficulties such as the high thermal conductivity can be overcome by high intensities. However in industrial applications, a sufficient process capability is currently only achieved at high welding speeds. This leads to low penetration depths and h...
Source: Physics Procedia - September 17, 2016 Category: Physics Source Type: research
Influence of Surface Coatings of Filler Wires on Weld Seam Properties of Laser Beam Welded Copper Connections
Publication date: 2016 Source:Physics Procedia, Volume 83 Author(s): Vincent Mann, Matthias Holzer, Konstantin Hofmann, Esra Özkaya, Florian Hugger, Stephan Roth, Michael Schmidt In laser beam welding of copper its material properties require high intensities of the laser beam for a stable process, which are often realized by small focal diameters. Thus conventional laser beam welding of copper is accompanied by small bridgeable gap widths. A way to increase tolerable gap widths is the use of filler wires, which leads to higher energy consumption per unit length of the process, as extra energy is necessary to mel...
Source: Physics Procedia - September 17, 2016 Category: Physics Source Type: research
Mechanical Properties and Fracture Behaviour of LMD Produced 2.4682 and Wrought 2.4630 Dissimilar Welds
Publication date: 2016 Source:Physics Procedia, Volume 83 Author(s): Martin Dahmen, Marco Göbel A bearing made of Stellite 31 (2.4682) has to be welded onto a housing of Nimonic 75 (2.4630) by autogenous laser beam welding. The bearing part is produced by laser metal deposition (LMD), the housing consists of wrought sheet metal. An investigation is undertaken in order to study the effect of the anisotropy of the LMD part on the weld quality. Tensile specimens were produced and tested under varying load directions and test temperatures, and application of different weld heat treatments. The fractured specimens were ana...
Source: Physics Procedia - September 17, 2016 Category: Physics Source Type: research
Yb-fibre Laser Welding of 6 mm Duplex Stainless Steel 2205
Publication date: 2016 Source:Physics Procedia, Volume 83 Author(s): M. Bolut, C.Y. Kong, J. Blackburn, K.A. Cashell, P.R. Hobson Duplex stainless steel (DSS) is one of the materials of choice for structural and nuclear applications, having high strength and good corrosion resistance when compared with other grades of stainless steel. The welding process used to join these materials is critical as transformation of the microstructure during welding directly affects the material properties. High power laser welding has recently seen an increase in research interest as it offers both speed and flexibility. This paper ...
Source: Physics Procedia - September 17, 2016 Category: Physics Source Type: research
Microstructure and Porosity of Laser-welded Dissimilar Material Joints of HR-2 and J75
Publication date: 2016 Source:Physics Procedia, Volume 83 Author(s): Xianfeng Shen, Wenhua Teng, Shuming Zhao, Wenpei He Dissimilar laser welding of HR-2 and J75 has a wide range of applications in high-and low-temperature hydrogen storage. The porosity distributions of the welded joints were investigated at different line energies, penetration status, and welding positions (1G, 2G, and 3G). The effect of the welding position on the welding appearance was evident only at high line energies because of the essential effect of gravity of the larger and longer dwelling molten pool. The porosity of the welded joints betwe...
Source: Physics Procedia - September 17, 2016 Category: Physics Source Type: research
High-power Laser Welding of Thick Steel-aluminum Dissimilar Joints
Publication date: 2016 Source:Physics Procedia, Volume 83 Author(s): Rabi Lahdo, André Springer, Ronny Pfeifer, Stefan Kaierle, Ludger Overmeyer According to the Intergovernmental Panel on Climate Change (IPCC), a worldwide reduction of CO2-emissions is indispensable to avoid global warming. Besides the automotive sector, lightweight construction is also of high interest for the maritime industry in order to minimize CO2-emissions. Using aluminum, the weight of ships can be reduced, ensuring lower fuel consumption. Therefore, hybrid joints of steel and aluminum are of great interest to the maritime industry. In ord...
Source: Physics Procedia - September 17, 2016 Category: Physics Source Type: research
Investigations on Laser Beam Welding of Different Dissimilar Joints of Steel and Aluminum Alloys for Automotive Lightweight Construction
Publication date: 2016 Source:Physics Procedia, Volume 83 Author(s): Oliver Seffer, Ronny Pfeifer, André Springer, Stefan Kaierle Due to the enormous potential of weight saving, and the consequential reduction of pollutant emissions, the use of hybrid components made of steel and aluminum alloys is increasing steadily, especially concerning automotive lightweight construction. However, thermal joining of steel and aluminum is still being researched, due to a limited solubility of the binary system of iron and aluminum causing the formation of hard and brittle intermetallic phases, which decrease the strength and the...
Source: Physics Procedia - September 17, 2016 Category: Physics Source Type: research
