Comparative measurements on thermal plasma jet characteristics in atmospheric and low pressure plasma sprayings

1995 ◽  
Vol 23 (5) ◽  
pp. 852-859 ◽  
Author(s):  
Hyung Jin Kim ◽  
Sang Hee Hong
Keyword(s):  
Thermal Plasma ◽  
Plasma Jet ◽  
Low Pressure ◽  
Pressure Plasma ◽  
Thermal Plasma Jet ◽  
Low Pressure Plasma ◽  
Jet Characteristics ◽  
Plasma Jet Characteristics

scholarly journals Studying the non-thermal plasma jet characteristics and application on bacterial decontamination

2018 ◽  
Vol 12 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Ali F. Al-rawaf ◽  
Fadhil Khaddam Fuliful ◽  
Mohammed K. Khalaf ◽  
Husham. K. Oudah
Keyword(s):  
Thermal Plasma ◽  
Plasma Jet ◽  
Thermal Plasma Jet ◽  
Non Thermal Plasma ◽  
Jet Characteristics ◽  
Plasma Jet Characteristics

scholarly journals Fundamentals and application of an expanding hydrogen low-pressure plasma jet

Vacuum ◽  
1996 ◽  
Vol 47 (9) ◽  
pp. 1123-1127 ◽  
Author(s):  
DK Otorbaev ◽  
GJH Brussaard ◽  
Zhou Qing ◽  
MCM van de Sanden ◽  
DC Schram
Keyword(s):  
Plasma Jet ◽  
Low Pressure ◽  
Pressure Plasma ◽  
Low Pressure Plasma

scholarly journals How Hydrogen Admixture Changes Plasma Jet Characteristics in Spray Processes at Low Pressure

2020 ◽  
Author(s):  
Georg Mauer
Keyword(s):  
Thermal Conductivity ◽  
Plasma Jet ◽  
Low Pressure ◽  
Atmospheric Conditions ◽  
Hydrogen Atoms ◽  
Electron Densities ◽  
Radial Temperature ◽  
Jet Characteristics ◽  
Plasma Enthalpy ◽  
Plasma Jet Characteristics

AbstractIn plasma spraying, hydrogen is widely used as a secondary working gas besides argon. In particular under low pressure, there are strong effects on the plasma jet characteristics even by small hydrogen percentages. Under such conditions, fundamental mechanisms like diffusion and recombination are affected while this is less relevant under atmospheric conditions. This was investigated for argon–hydrogen mixtures by optical emission spectroscopy (OES). The small electron densities under the investigated low pressure conditions implied specific difficulties in the application of several OES-based methods which are discussed in detail. Adding hydrogen to the plasma gas effected an increased plasma enthalpy. Moreover, the jet expanded radially as the reactive part of the thermal conductivity was enhanced by recombination of atomic hydrogen so that the shock waves were less reflected at the cold jet rims. In the jet cores, the lowest temperatures were found for the highest hydrogen admixture because the energy consumption due to the dissociation of molecular hydrogen outbalanced the increase of the plasma enthalpy. Variations in the radial temperature profiles were related to the jet structure and radial thermal conductivity. The local hydrogen–argon concentration ratios revealed an accumulation of hydrogen atoms at the jet rims. Clear indications were found, that higher hydrogen contents promoted the fast recombination of electrons and ions. However, it is assumed that the transport properties of the plasma were hardly affected by this, since the electron densities and thus the ionization degrees were generally small due to the low pressure conditions.

Experimental Study of the Discharge in the Low Pressure Plasma Jet Sputtering System

2013 ◽  
Vol 53 (1) ◽  
pp. 10-15 ◽  
Author(s):  
J. Klusoiň ◽  
P. Kudrna ◽  
A. Kolpaková ◽  
I. Picková ◽  
Z. Hubička ◽  
...  
Keyword(s):  
Experimental Study ◽  
Plasma Jet ◽  
Low Pressure ◽  
Pressure Plasma ◽  
Low Pressure Plasma ◽  
Sputtering System
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