Surface Treatment of Aluminum Sheets by Pulsed Microwave Plasma Discharge at Atmospheric Pressure

2007 ◽  
Vol 46 (6A) ◽  
pp. 3583-3588 ◽  
Author(s):  
Soon Cheon Cho ◽  
Yong Cheol Hong ◽  
Han Sup Uhm
Keyword(s):  
Surface Treatment ◽  
Atmospheric Pressure ◽  
Microwave Plasma ◽  
Plasma Discharge ◽  
Aluminum Sheets

scholarly journals Atmospheric Pressure Linear Microwave Plasma for Surface Treatment of Materials

2017 ◽  
Vol 60 (3) ◽  
pp. 105-111 ◽  
Author(s):  
Haruo SHINDO ◽  
Hiroshi KUWAHATA ◽  
Masao ISOMURA
Keyword(s):  
Surface Treatment ◽  
Atmospheric Pressure ◽  
Microwave Plasma

Obtaining Hydrogen and Carbon Materials from Hydrocarbonic Gas in Microwave Plasma Discharge at Amospheric Pressure

2015 ◽  
Vol 1084 ◽  
pp. 50-53
Author(s):  
Alekxey G. Zherlitsyn ◽  
Vladimir P. Shiyan ◽  
Nataliya N. Zyablova
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Material ◽  
Atmospheric Pressure ◽  
Microwave Plasma ◽  
Plasma Source ◽  
Plasma Discharge ◽  
Active System ◽  
Waveguide Type ◽  
Gas Conversion ◽  
Plasmochemical Reaction

This paper presents the results of a pilot study of the process of hydrocarbonic gas conversion in microwave plasma discharge at atmospheric pressure. A microwave plasmatron of the waveguide type with the power of up to 3 kW was developed and used as a plasma source. Hydrocarbonic gas is both a chemical reagent and a plasma-forming environment in this plasmatron. A peculiarity of the developed microwave plasmatron is the presence of an active system for initiating and maintaining microwave discharge in its structure. It has been demonstrated that a high (up to 70%) degree of conversion of hydrocarbonic gases can be attained in microwave plasma discharge. The products of plasmochemical reaction are hydrogen and a carbon material. The carbon material contains up to 60% of carbon nanotubes. The phase structure of the material and the cross sizes of carbon nanotubes are provided herein.

scholarly journals Enhanced Wetting and Adhesive Properties by Atmospheric Pressure Plasma Surface Treatment Methods and Investigation Processes on the Influencing Parameters on HIPS Polymer

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 901
Author(s):  
Miklós Berczeli ◽  
Zoltán Weltsch
Keyword(s):  
Surface Treatment ◽  
Plasma Treatment ◽  
Atmospheric Pressure ◽  
High Impact ◽  
Plasma Parameters ◽  
Plasma Surface ◽  
Wetting Properties ◽  
High Impact Polystyrene ◽  
Process Modification ◽  
Plasma Surface Treatment

The development of bonding technology and coating technologies require the use of modern materials and topologies for the demanding effect and modification of their wetting properties. For the industry, a process modification process that can be integrated into a process is the atmospheric pressure of air operation plasma surface treatment. This can be classified and evaluated based on the wettability, which has a significant impact on the adhesive force. The aim is to improve the wetting properties and to find the relationship between plasma treatment parameters, wetting, and adhesion. High Impact PolyStyrene (HIPS) was used as an experimental material, and then the plasma treatment can be treated with various adjustable parameters. The effect of plasma parameters on surface roughness, wetting contact angle, and using Fowkes theory of the surface energy have been investigated. Seven different plasma jet treatment distances were tested, combined with 5 scan speeds. Samples with the best plasma parameters were prepared from 25 mm × 25 mm overlapping adhesive joints using acrylic/cyanoacrylate. The possibility of creating a completely hydrophilic surface was achieved, where the untreated wetting edge angle decreased from 88.2° to 0° for distilled water and from 62.7° to 0° in the case of ethylene glycol. The bonding strength of High Impact PolyStyrene was increased by plasma treatment by 297%.

Assessment of two atmospheric-pressure microwave plasma sources for H2 production from ethanol decomposition

2021 ◽  
Vol 294 ◽  
pp. 116948
Author(s):  
R. Rincón ◽  
J. Muñoz ◽  
F.J. Morales-Calero ◽  
J. Orejas ◽  
M.D. Calzada
Keyword(s):  
Atmospheric Pressure ◽  
Microwave Plasma ◽  
H2 Production ◽  
Plasma Sources ◽  
Ethanol Decomposition

scholarly journals Influence of gas flow on argon microwave plasma jet at atmospheric pressure

2011 ◽  
Vol 206 (6) ◽  
pp. 1449-1453 ◽  
Author(s):  
Shouichiro Iio ◽  
Kosuke Yanagisawa ◽  
Chizuru Uchiyama ◽  
Katsuya Teshima ◽  
Naomichi Ezumi ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Gas Flow ◽  
Microwave Plasma ◽  
Plasma Jet

Nitriding of yttria-stabilized zirconia in atmospheric pressure microwave plasma

2009 ◽  
Vol 24 (6) ◽  
pp. 2021-2028 ◽  
Author(s):  
R. Milani ◽  
R.P. Cardoso ◽  
T. Belmonte ◽  
C.A. Figueroa ◽  
C.A. Perottoni ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Microwave Plasma ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
Zirconium Nitride ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
X Ray ◽  
Yttria Partially Stabilized Zirconia

High temperature plasma nitriding of yttria-partially-stabilized zirconia in atmospheric pressure microwave plasma was investigated. The morphological, mechanical, and physicochemical characteristics of the resulting nitrided layer were characterized by different methods, such as optical and scanning electron microscopy, microindentation, x-ray diffraction, narrow resonant nuclear reaction profiling, secondary neutral mass spectrometry, and x-ray photoelectron spectroscopy, aiming at investigating the applicability of this highly efficient process for nitriding of ceramics. The structure of the plasma nitrided layer was found to be complex, composed of tetragonal and cubic zirconia, as well as zirconium nitride and oxynitride. The growth rate of the nitrided layer, 4 µm/min, is much higher than that obtained by any other previous nitriding process, whereas a typical 50% increase in Vickers hardness over that of yttria-partially-stabilized zirconia was observed.

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