Laser and Radiofrequency Air Plasma Sources

2003 ◽  
Author(s):  
J. E. Scharer
Keyword(s):  
Air Plasma ◽  
Plasma Sources

scholarly journals Changes in Surface Characteristics of BOPP Foil after Treatment by Ambient Air Plasma Generated by Coplanar and Volume Dielectric Barrier Discharge

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4173
Author(s):  
Petra Šrámková ◽  
Zlata Kelar Tučeková ◽  
Michal Fleischer ◽  
Jakub Kelar ◽  
Dušan Kováčik
Keyword(s):  
Dielectric Barrier Discharge ◽  
Food Packaging ◽  
Barrier Discharge ◽  
Surface Characteristics ◽  
Ambient Air ◽  
Surface Wettability ◽  
Surface Barrier ◽  
Air Plasma ◽  
Dielectric Barrier ◽  
Plasma Sources

Biaxially oriented polypropylene (BOPP) is a highly transparent polymer defined by excellent mechanical and barrier properties applicable in the food packaging industry. However, its low surface free energy restricts its use in many industrial processes and needs to be improved. The presented study modifies a BOPP surface using two different atmospheric-pressure plasma sources operating in ambient air and capable of inline processing. The volume dielectric barrier discharge (VDBD) and diffuse coplanar surface barrier discharge (DCSBD) were applied to improve the wettability and adhesion of the 1–10 s treated surface. The changes in morphology and surface chemistry were analyzed by SEM, AFM, WCA/SFE, and XPS, and adhesion was evaluated by a peel force test. Comparing both plasma sources revealed their similar effect on surface wettability and incorporation of polar functional groups. Additionally, higher surface roughness in the case of VDBD treatment contributed to slightly more efficient adhesion in comparison to DCSBD. Although we achieved comparable results for both plasma sources in the term of enhanced surface wettability, degree of oxidation, and stability of induced changes, DCSBD had less effect on the surface deterioration than VDBD, where surface structuring caused an undesirable haze.

H- production in pure hydrogen discharges of surface-plasma sources

1988 ◽  
Vol 23 (12) ◽  
pp. 1889-1892 ◽  
Author(s):  
Yu. I. Belchenko ◽  
A.S. Kupriyanov
Keyword(s):  
Pure Hydrogen ◽  
Surface Plasma ◽  
Plasma Sources

HOT CORROSION OF CERIA-YTTRIA STABILIZED ZIRCONIA PLASMA SPRAYED THERMAL BARRIER COATING BY EUTECTIC VANDIUM PENTAOXIDE-SODIUM SULFATE

2018 ◽  
Vol 18 (1) ◽  
pp. 182-192 ◽  
Author(s):  
Mohammed J Kadhim ◽  
Mohammed H Hafiz ◽  
Maryam A Ali Bash
Keyword(s):  
Thermal Barrier Coating ◽  
Hot Corrosion ◽  
Monoclinic Phase ◽  
Volume Fraction ◽  
High Volume ◽  
Thermal Barrier ◽  
Air Plasma ◽  
Plan View ◽  
Barrier Coating ◽  
Plasma Sprayed

The high temperature corrosion behavior of thermal barrier coating (TBC) systemconsisting of IN-738 LC superalloy substrate, air plasma sprayed Ni24.5Cr6Al0.4Y (wt%)bond coat and air plasma sprayed ZrO2-20 wt% ceria-3.6 wt% yttria (CYSZ) ceramic coatwere characterized. The upper surfaces of CYSZ covered with 30 mg/cm2 , mixed 45 wt%Na2SO4-55 wt% V2O5 salt were exposed at different temperatures from 800 to 1000 oC andinteraction times from 1 up to 8 h. The upper surface plan view of the coatings wereidentified for topography, roughness, chemical composition, phases and reaction productsusing scanning electron microscopy, energy dispersive spectroscopy, talysurf, and X-raydiffraction. XRD analyses of the plasma sprayed coatings after hot corrosion confirmed thephase transformation of nontransformable tetragonal (t') into monoclinic phase, presence ofYVO4 and CeVO4 products. Analysis of the hot corrosion CYSZ coating confirmed theformation of high volume fraction of YVO4, with low volume fractions of CeOV4 and CeO2.The formation of these compounds were combined with formation of monoclinic phase (m)from transformation of nontransformable tetragonal phase (t').

Trace Elemental Analysis Technologies using Atmospheric Plasma Sources

2010 ◽  
Vol 130 (10) ◽  
pp. 955-962 ◽  
Author(s):  
Kaori Shigeta ◽  
Yoichi Nagata ◽  
Takahiro Iwai ◽  
Hidekazu Miyahara ◽  
Akitoshi Okino
Keyword(s):  
Elemental Analysis ◽  
Atmospheric Plasma ◽  
Trace Elemental Analysis ◽  
Plasma Sources ◽  
Trace Elemental

SPECTRAL AND OPTICAL RESEARCHES OF A TORCH OF STEAM-AIR PLASMA GENERATOR OF ALTERNATING CURRENT

2009 ◽  
Vol 13 (2) ◽  
pp. 189-193
Author(s):  
A. V. Surov ◽  
A. V. Pavlov ◽  
A. V. Nikonov ◽  
R. V. Ovchinnikov ◽  
V. A. Spodobin ◽  
...  
Keyword(s):  
Plasma Generator ◽  
Alternating Current ◽  
Air Plasma

Targeted Cancer Treatment Using Anti-EGFR and -TFR Antibody-Conjugated Gold Nanoparticles Stimulated by Nonthermal Air Plasma

2011 ◽  
Vol 1 (2) ◽  
pp. 179-188
Author(s):  
GonJun Kim ◽  
S. R. Park ◽  
G. C. Kim ◽  
Jae Koo (J. K.) Lee
Keyword(s):  
Gold Nanoparticles ◽  
Cancer Treatment ◽  
Air Plasma
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