Laser initiation of an electrical discharge channel in cesium contained gas

1986 ◽  
Vol 59 (11) ◽  
pp. 3722-3727 ◽  
Author(s):  
H. Tamura ◽  
K. Horioka ◽  
K. Kasuya
Keyword(s):  
Electrical Discharge ◽  
Discharge Channel ◽  
Laser Initiation

A Discharge Separation Model for Powder Mixed Electrical Discharge Machining

2016 ◽  
Vol 138 (8) ◽  
Author(s):  
Bülent Ekmekci ◽  
Hamidullah Yaşar ◽  
Nihal Ekmekci
Keyword(s):  
Electrical Discharge ◽  
Discharge Channel ◽  
Electrical Discharge Machining ◽  
Complete Separation ◽  
Dielectric Liquid ◽  
Material Transfer ◽  
Machined Surface ◽  
Machining Conditions ◽  
Main Discharge ◽  
Pulse On Time

Added powders in a dielectric medium substantially influence the features of electrical discharges due to altered interelectrode conditions during the electrical discharge machining (EDM) process. The main discharge channel is disturbed due to the added powders in dielectric liquid and leads formations of secondary discharges. Such altered discharge conditions generate a unique topography on the machined surface and consequent subsurface microstructure beneath it. Ti6Al4V work material machined using SiC powder mixing in de-ionized water for an extensive set of pulse-on duration and pulse currents. Then, different forms of secondary discharges were identified from the resultant surface features and corresponding subsurface microstructures. The results pointed out that generation of unevenly separated secondary discharges increased the material transfer rate from the powder mixed dielectric liquid to the machined surface by means of the decomposed ions in the plasma channel. Complete separation of the main discharge channel into evenly distributed secondary discharges is possible under specific machining conditions that suggested minimal deformation of the machined surface regarding microcracks, roughness, and heat affected layer thickness. Under such machining conditions, another means of material transfer mechanism is activated that lead a powder particle build-up process on the machined surface. Consequently, five different discharge forms were proposed to describe the resultant surface topographies and subsurface microstructures. The material migration phenomena and the mechanisms are discussed in relation to the pulse-on time and pulse current.

scholarly journals Evolution of electrical discharge channel in isopropyl alcohol solution

2015 ◽  
Vol 653 ◽  
pp. 012157 ◽  
Author(s):  
V A Panov ◽  
L M Vasilyak ◽  
V Ya Pecherkin ◽  
S P Vetchinin ◽  
Yu M Kulikov ◽  
...  
Keyword(s):  
Electrical Discharge ◽  
Discharge Channel ◽  
Isopropyl Alcohol ◽  
Alcohol Solution ◽  
Isopropyl Alcohol Solution

Electrical discharge channel in cesium vapor initiated by a XeCl laser

1984 ◽  
Vol 45 (3) ◽  
pp. 234-236 ◽  
Author(s):  
M. Hijikawa ◽  
H. Tamura ◽  
H. Arishima ◽  
K. Horioka ◽  
K. Kasuya
Keyword(s):  
Electrical Discharge ◽  
Discharge Channel ◽  
Cesium Vapor ◽  
Xecl Laser

Electrical Discharge Channel in Sodium Vapor Initiated by Resonant Laser Light

1983 ◽  
Vol 22 (Part 2, No. 7) ◽  
pp. L417-L419 ◽  
Author(s):  
Hideki Tamura ◽  
Jun-ichi Mogi ◽  
Kazuhiko Horioka ◽  
Koichi Kasuya
Keyword(s):  
Electrical Discharge ◽  
Discharge Channel ◽  
Laser Light ◽  
Sodium Vapor ◽  
Resonant Laser

Effects of Electrical Discharges in Low Pressure Gases on the Morphology of Polyethylene Crystals

1974 ◽  
Vol 32 ◽  
pp. 544-545
Author(s):  
L.H. Bolz ◽  
D.H. Reneker
Keyword(s):  
Power Distribution ◽  
Electrical Discharge ◽  
Dielectric Breakdown ◽  
Ionic Species ◽  
Low Pressure ◽  
Polymer Surfaces ◽  
Electrical Discharges ◽  
Adhesive Bonds ◽  
Power Distribution Lines ◽  
Modification Of The Surface

The attack, on the surface of a polymer, by the atomic, molecular and ionic species that are created in a low pressure electrical discharge in a gas is interesting because: 1) significant interior morphological features may be revealed, 2) dielectric breakdown of polymeric insulation on high voltage power distribution lines involves the attack on the polymer of such species created in a corona discharge, 3) adhesive bonds formed between polymer surfaces subjected to such SDecies are much stronger than bonds between untreated surfaces, 4) the chemical modification of the surface creates a reactive surface to which a thin layer of another polymer may be bonded by glow discharge polymerization.

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