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Floating potential and plasma sheath in vacuum arc plasma
Journal of Applied Physics, 1993Variation of the electric field across the plasma sheath and floating-potential magnitude are calculated at vacuum arc plasma-plane floating surface contact. Due to the nonequilibrium conditions in the cathode-governed vacuum arc plasma, the floating-potential magnitude is smaller and the effective plasma sheath thickness is larger, compared to the ...
Radić, Nikola +2 more
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2013
The development of the plasma transferred arc coating process was directed towards reducing the cost of corrosion and wear resistant parts. Regular steel parts with an appropriate PTA coating can exhibit superior corrosion and wear behavior even compared to specialty alloys. The process is significantly different from the other coating processes as the
Pierre L. Fauchais +2 more
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The development of the plasma transferred arc coating process was directed towards reducing the cost of corrosion and wear resistant parts. Regular steel parts with an appropriate PTA coating can exhibit superior corrosion and wear behavior even compared to specialty alloys. The process is significantly different from the other coating processes as the
Pierre L. Fauchais +2 more
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FROM TRANSFERRED ARC TO PLASMA TORCHES
High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes), 2005Thermal plasma generated either by transferred arc or by plasma torches are involved in many industrial processes including, for example, cutting, welding, powder synthesis or coating elaboration by plasma spray techniques. The common feature is that electrical energy is converted into thermal energy, which must be transferred differently following the
Coudert, Jean-François +3 more
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Journal of Nuclear Materials, 1978
Abstract In a plasma an arc discharge may operate sustained by electromotive forces produced by special structures of the system e.g. sheaths and density gradients. The current flow of such an arc discharge may be quite complicated using besides the plasma all kinds of conducting walls with which it is in contact.
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Abstract In a plasma an arc discharge may operate sustained by electromotive forces produced by special structures of the system e.g. sheaths and density gradients. The current flow of such an arc discharge may be quite complicated using besides the plasma all kinds of conducting walls with which it is in contact.
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1993
Abstract Plasma arc welding (PAW) can be defined as a gas-shielded arc welding process where the coalescence of metals is achieved via the heat transferred by an arc that is created between a tungsten electrode and a workpiece. This article discusses the melt-in mode and the keyhole mode of the PAW process, as well as the advantages and ...
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Abstract Plasma arc welding (PAW) can be defined as a gas-shielded arc welding process where the coalescence of metals is achieved via the heat transferred by an arc that is created between a tungsten electrode and a workpiece. This article discusses the melt-in mode and the keyhole mode of the PAW process, as well as the advantages and ...
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Initiation of Arcing at a Plasma-Wall Contact
IEEE Transactions on Plasma Science, 1982Conditions for the initiation of arcing in a plasma-wall contact were studied experimentally. Arcing could only be initiated by applying a bias voltage producing a net ion current to the wall. Results obtained show that crucial parameters for the initiation of arcing are the wall material, surface contaminations, the voltage across the plasma-wall ...
H. Ehrich, J. Karlau, K.G. Müller
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Robotic ARC Welding and Plasma ARC Cutting
SAE Technical Paper Series, 1987<div class="htmlview paragraph">Robotic arc welding and plasma arc cutting, in general, require precise positioning of the torch relative to the workpiece. To this end, a 1-dimensional non-contact sensor was applied to two assembly plant tasks and found to perform to requirements while maintaining the system's cost effectiveness.</div> < ...
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2016
This chapter focuses on the theoretical description of the physical processes in the Arc plasma torches with different technological applications. The features of electric Arcs and their models for the study of Arc plasma torches are presented. The need to determine the two-dimensional electromagnetic field, especially in the case of an open free Arc ...
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This chapter focuses on the theoretical description of the physical processes in the Arc plasma torches with different technological applications. The features of electric Arcs and their models for the study of Arc plasma torches are presented. The need to determine the two-dimensional electromagnetic field, especially in the case of an open free Arc ...
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Arc plasma jets of a nontransferred plasma torch
IEEE Transactions on Plasma Science, 1996The plasma flow of a nontransferred plasma torch used for thermal plasma processings is produced by the arc-gas interactions between a cathode tip and an anode nozzle and expands as a jet through the nozzle. In this work, numerically calculated images of the are plasma characteristics are found over the entire plasma region, including both an arc-gas ...
null Kyoung Doo Kang, null Sang Hee Hong
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Arc welding, plasma cutting and plasma spraying
Journal of Physics D: Applied Physics, 2013Thermal plasmas are of immense and increasing industrial importance. Their many applications can be divided into those that require relatively low power such as arc welding, plasma cutting, plasma spraying and arc lighting, and those that typically operate at much high powers, including mineral processing, waste treatment and nanoparticle production ...
A. B. Murphy +2 more
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