Results 31 to 40 of about 58,048 (311)
Ionization in the plasma of a copper arc
Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry, 1962 From the relative intensities of arc and spark lines observed in a d-c arc in air between copper electrodes, the degree of ionization of eleven elements added to the copper has been determined. With the aid of Saha’s ionization equation, the electron density in the arc was calculated to be 2.4×10(14) cm(−3). Partition functions for atoms and ions of 29
openaire +1 more source
Dental Research Journal, 2012 Background: Reduced time and appropriate bond strength of brackets is one of the most important aspects of orthodontic treatments. Prolonged halogen light curing for bonding of brackets is undesirable, so the purpose of this study was to compare the ...
Mohammad Hossein IndianJPsychiatry +4 more
doaj +1 more source
Comparison of Different Unconventional Thermal Energies for Steel Cutting Process
Diyala Journal of Engineering Sciences, 2013 different unconventional heat sources for material processing were discussed . The heat sources such as plasma arc, electron beam and Co2 laser were employed previously by other researchers, while " Co2laser– gas mixture" system was studied during the ...
Jasim Hassan Rasheed
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Metals, 2022 Herein, a 2D unified model coupling a plasma arc–molten bath–cavity in a direct current electric arc furnace was developed for a characteristic analysis of the fluid flow and heating rate of the molten bath. The ‘local thermodynamic equilibrium–diffusion
Conglin Yao +3 more
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A langmuir multi-probe system for the characterization of atmospheric pressure arc plasmas [PDF]
, 2003 The 'high-pressure' atmospheric (TIG) arc plasma is studied by means of a multi-Langmuir probe system. In order to determine the appropriate regime of operation, definitions of the plasma parameters for the description of the argon arc are considered and
Fanara, C.
core
Advanced Engineering Materials, EarlyView.This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira +4 more
wiley +1 more source
MetalsIn the keyhole variable polarity plasma arc weldng (VPPAW) process at horizontal position, the metal driven by gravity gathered on one side of the molten pool, and the weld formation is difficult, especially for thick workpiece welding.
Hongxing Zhao, Chunli Yang, Chenglei Fan
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AIP Advances, 2020 Plasma–solid interaction represents a major concern in many applications such as power-interruption and plasma–metal processing. Characterized by high-current density and voltage drop, the arc roots dissipate intensive heat to electrode vaporization ...
Jindong Huo +6 more
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Desenvolvimentos no processo híbrido Plasma-Mig para operações de soldagem e brasagem [PDF]
, 2006 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Mecânica.Avanços no desenvolvimento da tecnologia da soldagem têm ocorrido pela associação de dois processos, formando uma nova ...
Oliveira, Moisés Alves de
core
Advanced Engineering Materials, EarlyView.Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios +5 more
wiley +1 more source