Results 61 to 70 of about 409,231 (284)

Reduction of Oxide Inclusions During the High‐Frequency Welding of Steel via a Nonthermal Ar/H2 Plasma Jet

Advanced Engineering Materials, EarlyView.
High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin, Lienhard Wegewitz, René Gustus, Henning Wiche, Wolfgang Maus‐Friedrichs   +4 more
wiley   +1 more source

Structure and photoluminescence of magnesium germanate containing tetravalent manganese as activating cation

Vetor
The aim of the current study is to present the acetate method synthesis of magnesium germanate (Mg2GeO4) compound containing Mn4+ as activating cation for optical transitions.
Larissa Nolding Nicolau, Ada López, Lilian Pantoja Sosman, Sandra da Silva Pedro   +3 more
doaj   +1 more source

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Spectroscopy and 3D imaging of the Crab nebula

, 2004
Spectroscopy of the Crab nebula along different slit directions reveals the 3 dimensional structure of the optical nebula. On the basis of the linear radial expansion result first discovered by Trimble (1968), we make a 3D model of the optical emission ...
Alberto Carraminana, Andrej Čadež, Caraveo P. A., Clark D. H., Simon Vidrih, Velusamy T., Veron-Cetty M. P., Wyckoff S.   +7 more
core   +1 more source

Electrical Conductivities of Conductors, Semiconductors, and Their Mixtures at Elevated Temperatures

Advanced Engineering Materials, EarlyView.
This article presents a comprehensive review of temperature‐dependent electrical conductivity data for multiple material classes at elevated temperatures, highlighting a persistent conductivity gap between metals and semiconductors in the range of 102$\left(10\right)^{2}$– 107$\left(10\right)^{7}$ S/m. Metal–ceramic irregular metamaterials are proposed
Valentina Torres Nieto, Marcia A. Cooper
wiley   +1 more source

Multi-frequency Study of the LMC Supernova Remnant (SNR) B0513-692 and New SNR Candidate J051327-6911

, 2007
We present a new multi-wavelength study of supernova remnant (SNR) B0513-692 in the Large Magellanic Cloud (LMC). The remnant also has a strong, superposed, essentially unresolved, but unrelated radio source at its north-western edge, J051324-691049 ...
A. Kawamura, Bisnovatyi-Kogan, Bock, Clarke, Davies, Dickel, Egan, Egan, Elmegreen, Feast, Fesen, Filipović, Fukui, Fukui, Gaensler, Gaensler, Gurwell, Haberl, Henize, Ho, I. S. Bojičić, Inglis, J. L. Payne, Kaler, Kesteven, Long, M. D. Filipović, Mathewson, Mathewson, Mathewson, Mathewson, Mathewson, Mills, Nelson, P. A. Jones, Q. A. Parker, Reid, Reid, Sault, Sault, Udalski, Van Der Marel, Voges, W. Reid, Weiler, Williams, Y. Fukui, Yamaguchi, Ye   +48 more
core   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth, Tomáš Babinský, Jan Lars Riedel, Wen Hao Kan, Aijun Huang, Martin Heilmaier, Ivo Šulák   +6 more
wiley   +1 more source

Comprehensive characterization of nitrogen-related defect states in β-Ga2O3 using quantitative optical and thermal defect spectroscopy methods

APL Materials
This study provides a comprehensive analysis of the dominant deep acceptor level in nitrogen-doped beta-phase gallium oxide (β-Ga2O3), elucidating and reconciling the hole emission features observed in deep-level optical spectroscopy (DLOS).
Hemant Ghadi, Evan Cornuelle, Joe F. Mcglone, Alexander Senckowski, Shivam Sharma, Man Hoi Wong, Uttam Singisetti, Steven A. Ringel   +7 more
doaj   +1 more source

Spatial confinement of laser-induced plasma by laser-induced and obstacle-reflected shock wave and its effect on optical emission of laser-induced plasma

AIP Advances, 2019
The laser-induced plasma (LIP) and the shock wave generated by pulsed laser ablation of a graphite target in air and reflected by a flat obstacle were examined by optical emission spectroscopy and probe beam deflection measurements.
Yining Qiu, Chujun Yao, Chengbao Yao, Jie Gan, Wu Zhang, Ning Xu, Jian Sun, Jiada Wu   +7 more
doaj   +1 more source

Radioluminescence and photoluminescence of Th:CaF$_2$ crystals

, 2015
We study thorium-doped CaF$_2$ crystals as a possible platform for optical spectroscopy of the Th-229 nuclear isomer transition. We anticipate two major sources of background signal that might cover the nuclear spectroscopy signal: VUV-photoluminescence,
Schreitl, Matthias, Schumm, Thorsten, Stellmer, Simon   +2 more
core   +1 more source