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Arc Plasma Propagation and Arc Current Profiles [PDF]
IEEE Transactions on Plasma Science, 2019 When electrical arcs occur in space, a plasma expands away from the arc-site, neutralizing adjacent surfaces (a current), and causing a current to be produced at the arc-site (source of neutralization current). The speed of this plasma expansion depends on the plasma species, which in turn depend on the ionizable materials near the initial ...
Dale C. Ferguson +3 more
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Advances in inductively-coupled-plasma heaters for aerothermal testing of thermal-protection systems
Kongqi donglixue xuebaoInductively coupled plasma (ICP) heaters generate high-enthalpy and ultra-clean plasma flows through electromagnetic coupling discharge, showing significant value in the research of thermal protection materials (TPMs) for hypersonic vehicles.
Xingying Zhu +4 more
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Measurement of velocity and diameter of tungsten particles produced by arcing using high-speed video
Nuclear Materials and EnergyArcing is a mechanism of dust production and erosion in fusion devices. The masses and velocities of tungsten (W) particles produced by arcing is of special interest given that W is used as wall material in current experimental devices and is planned for
Alberto Castillo Castillo +7 more
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Chemical Engineering Transactions, 2015 An experimental cleaning system for surface modification was developed. It consisted of a plasma torch with a DC power supply to generate an atmospheric pressure plasma arc, two field coils with an AC power supply to generate an external transverse ...
X.J. Dong, J.B. Meng, X.T. Wei, W.H. Liu
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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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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
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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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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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Arc Shape Characteristics with Ultra-High-Frequency Pulsed Arc Welding
Applied Sciences, 2017 Arc plasma possesses a constriction phenomenon with a pulsed current. The constriction is created by the Lorentz force, the radial electromagnetic force during arc welding, which determines the energy distribution of the arc plasma.
Mingxuan Yang, Hao Zheng, Ling Li
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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
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