Dynamic Behavior of Arc Voltage and Electro-thermal Efficiency in Atmospheric Pressure Non-transferred Arc Plasma Torches under Different Degrees of Anode Cooling

2019 ◽  
Vol 28 (7) ◽  
pp. 1606-1626
Author(s):  
N. Tiwari ◽  
S. Nath ◽  
G. D. Dhamale ◽  
S. Ghorui
Keyword(s):  
Dynamic Behavior ◽  
Thermal Efficiency ◽  
Atmospheric Pressure ◽  
Arc Plasma ◽  
Arc Voltage ◽  
Plasma Torches ◽  
Transferred Arc

N2/H2 Non-thermal Transferred arc Plasma Nitriding Treatment of Stainless Steel at Atmospheric Pressure

2020 ◽  
Vol 40 (6) ◽  
pp. 1525-1537
Author(s):  
Q. J. Guo ◽  
Y. J. Zhao ◽  
G. H. Ni ◽  
L. Li ◽  
Q. F. Lin ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Atmospheric Pressure ◽  
Plasma Nitriding ◽  
Arc Plasma ◽  
Transferred Arc

Theory of Dynamic Behavior in Atmospheric Pressure Arc Plasma Devices: Part-II: Validation of Theory With Experimental Data

2004 ◽  
Vol 32 (1) ◽  
pp. 308-315 ◽  
Author(s):  
S. Ghorui ◽  
S.N. Sahasrabudhe ◽  
P.S.S. Murty ◽  
A.K. Das
Keyword(s):  
Experimental Data ◽  
Dynamic Behavior ◽  
Atmospheric Pressure ◽  
Arc Plasma

Current transfer in dc non-transferred arc plasma torches

2010 ◽  
Vol 43 (24) ◽  
pp. 245201 ◽  
Author(s):  
S Ghorui ◽  
S N Sahasrabudhe ◽  
A K Das
Keyword(s):  
Current Transfer ◽  
Arc Plasma ◽  
Plasma Torches ◽  
Transferred Arc

Stability and structures in atmospheric pressure DC non-transferred arc plasma jets of argon, nitrogen, and air

2018 ◽  
Vol 25 (7) ◽  
pp. 072103 ◽  
Author(s):  
N. Tiwari ◽  
S. Bhandari ◽  
S. Ghorui
Keyword(s):  
Atmospheric Pressure ◽  
Plasma Jets ◽  
Arc Plasma ◽  
Transferred Arc

Synthesis of ultrafine silicon carbide nanoparticles using non‐thermal arc plasma at atmospheric pressure

2021 ◽  
Author(s):  
Cheng Wang ◽  
Jiawen Zhou ◽  
Ming Song ◽  
Zhongshan Lu ◽  
Xianhui Chen ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Atmospheric Pressure ◽  
Arc Plasma ◽  
Silicon Carbide Nanoparticles

Predictions of Current Attachment at Thermionic Cathode for TIG Arcs

2008 ◽  
Vol 580-582 ◽  
pp. 319-322 ◽  
Author(s):  
Manabu Tanaka ◽  
Kentaro Yamamoto ◽  
Tashiro Shinichi ◽  
John J. Lowke
Keyword(s):  
Melting Point ◽  
Work Function ◽  
Atmospheric Pressure ◽  
The Other ◽  
Numerical Calculations ◽  
Maximum Temperature ◽  
Arc Plasma ◽  
Melting Points ◽  
Thermionic Cathode ◽  
Uniform Current

Study of current attachment at thermionic cathode for TIG arc at atmospheric pressure is attempted from numerical calculations of arc-electrodes unified model. The calculations show that the maximum temperature of arc plasma close to the cathode tip for W-2% ThO2 reaches 19,000 K and it is the highest value in comparison with the other temperatures for W-2% La2O3 and W-2% CeO2, because the current attachment at the cathode tip is constricted by a centralized limitation of liquid area of ThO2 due to its higher melting point. The calculations also show that, in cases of W- 2% La2O3 and W-2% CeO2, the liquid areas of La2O3 and Ce2O3 are widely expanded at the cathode tip due to their lower melting points and then produce uniform current attachments at the cathode. It is concluded that the current attachment at thermionic cathode is strongly dependent on work function, melting point and Richardson constant of emitter materials.

Study on Fast-Convert Ultrasonic Frequency Pulse TIG Welding Arc Characteristic

2011 ◽  
Vol 704-705 ◽  
pp. 745-751 ◽  
Author(s):  
Bo Jin Qi ◽  
Ming Xuan Yang ◽  
Bao Qiang Cong ◽  
Wei Li
Keyword(s):  
Pulse Current ◽  
Current Level ◽  
Tig Welding ◽  
Ultrasonic Frequency ◽  
Arc Plasma ◽  
Arc Voltage ◽  
Welding Arc ◽  
Huge Impact ◽  
Pulse Peak ◽  
Frequency Pulse

Based on ultrasonic frequency pulse tungsten inert-gas (TIG) welding for 0Cr18Ni9Ti austenitic stainless steel, the influence of pulse level parameters was investigated on the field of arc characteristic and arc force. The experimental results show that the pulse level parameters could have huge impact to arc characteristic and arc force. With the increased frequency of pulse level, arc plasma has a more obvious pinch effect, which causes the enhance of arc voltage. Similarly, the arc force can be improved obviously compared with that during conventional direct current (DC) TIG welding. By contrast, the sensitivity of welding characteristic to pulse current level frequency would reduce while the duty of pulse peak current increased.

Synthesis of aluminum nitride in transferred arc plasma furnaces

1993 ◽  
Vol 13 (4) ◽  
pp. 613-632 ◽  
Author(s):  
H. Ageorges ◽  
S. Megy ◽  
K. Chang ◽  
J. -M. Baronnet ◽  
J. K. Williams ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Arc Plasma ◽  
Transferred Arc
Sign in / Sign up

Export Citation Format

Share Document