Numerical Study on Plasma Jet and Particle Behavior in Multi-arc Plasma Spraying

2017 ◽  
Vol 26 (5) ◽  
pp. 811-830 ◽  
Author(s):  
K. Bobzin ◽  
M. Öte ◽  
J. Schein ◽  
S. Zimmermann
Keyword(s):  
Plasma Spraying ◽  
Numerical Study ◽  
Plasma Jet ◽  
Arc Plasma ◽  
Particle Behavior

D.C. Plasma Spraying: Effect of Arc root Fluctuations on Particle Behavior in the Plasma Jet

1999 ◽  
Vol 3 (2-3) ◽  
pp. 235-254 ◽  
Author(s):  
B. Dussoubs ◽  
G. Mariaux ◽  
Armelle Vardelle ◽  
Michel Vardelle ◽  
Pierre Fauchais
Keyword(s):  
Plasma Spraying ◽  
Plasma Jet ◽  
Particle Behavior ◽  
Arc Root

Modelling the Plasma Jet in Multi-Arc Plasma Spraying

2016 ◽  
Vol 25 (6) ◽  
pp. 1111-1126 ◽  
Author(s):  
K. Bobzin ◽  
M. Öte ◽  
J. Schein ◽  
S. Zimmermann ◽  
K. Möhwald ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Plasma Jet ◽  
Arc Plasma

MOTION OF ANODE ATTACHMENT AND FLUCTUATIONS OF PLASMA JET IN DC ARC PLASMA TORCH

1997 ◽  
Vol 1 (2) ◽  
pp. 167-178 ◽  
Author(s):  
Milan Hrabovsky ◽  
M. Konrad ◽  
Vladimir Kopecky ◽  
J. Hlina ◽  
J. Benes ◽  
...  
Keyword(s):  
Plasma Torch ◽  
Plasma Jet ◽  
Arc Plasma ◽  
Arc Plasma Torch ◽  
Dc Arc ◽  
Dc Arc Plasma Torch

scholarly journals High-Speed Video Analysis of the Process Stability in Plasma Spraying

2021 ◽  
Author(s):  
K. Bobzin ◽  
M. Öte ◽  
M. A. Knoch ◽  
I. Alkhasli ◽  
H. Heinemann
Keyword(s):  
Plasma Spraying ◽  
High Speed ◽  
Plasma Jet ◽  
Plasma Jets ◽  
Time Dependent ◽  
Acquisition Time ◽  
Fast Fourier Transformation ◽  
Frequency Spectra ◽  
Dependent Signal ◽  
The Stability

AbstractIn plasma spraying, instabilities and fluctuations of the plasma jet have a significant influence on the particle in-flight temperatures and velocities, thus affecting the coating properties. This work introduces a new method to analyze the stability of plasma jets using high-speed videography. An approach is presented, which digitally examines the images to determine the size of the plasma jet core. By correlating this jet size with the acquisition time, a time-dependent signal of the plasma jet size is generated. In order to evaluate the stability of the plasma jet, this signal is analyzed by calculating its coefficient of variation cv. The method is validated by measuring the known difference in stability between a single-cathode and a cascaded multi-cathode plasma generator. For this purpose, a design of experiment, covering a variety of parameters, is conducted. To identify the cause of the plasma jet fluctuations, the frequency spectra are obtained and subsequently interpreted by means of the fast Fourier transformation. To quantify the significance of the fluctuations on the particle in-flight properties, a new single numerical parameter is introduced. This parameter is based on the fraction of the time-dependent signal of the plasma jet in the relevant frequency range.

Relationships between arc plasma jet properties and plasma/liquid interaction mechanisms for the deposition of nanostructured ceramic coatings

2021 ◽  
Author(s):  
Vincent Rat ◽  
Marguerite Bienia ◽  
Gayatri Dasharath Dhamale ◽  
Fabrice Mavier ◽  
Céline Ruelle ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Plasma Jet ◽  
Ceramic Coatings ◽  
Nanostructured Coatings ◽  
Arc Plasma ◽  
Pulsed Plasma ◽  
Plasma Properties ◽  
Interaction Mechanisms ◽  
Technical Requirements ◽  
Major Interest

Abstract Ceramic nanostructured coatings with intermediate thicknesses between 10 and 100 µm exhibit improved thermal and mechanical properties for thermal barrier coatings or wear resistant coatings. Such coatings comply with the technical requirements of aeronautical and automotive applications. This implies to develop deposition processes with high throughput and deposition rates promoting the formation of nanostructured coatings. The use of a liquid phase as a carrier medium of nanoparticles or of solution precursors has been shown to be of major interest when being injected within a thermal plasma jet. The as-sprayed materials can form ceramic nanostructured coatings provided the liquid injection encompassing the physicochemical properties of liquid and its injection method copes with the plasma properties. Especially the repeatability of the interaction phenomena between the liquid phase and the arc jet has a key role in the efficiency deposition so that some research efforts are devoted to stabilize the arc while a liquid jet is continuously injected within the plasma. Alternatively a pulsed arc plasma jet can be generated and associated with a time-phased injection of droplets. This paper presents the different issues related to the arc plasma properties produced by direct plasma torches including the arc instabilities and their influence on plasma/liquid interaction mechanisms leading to the formation of nanomaterials. A focus is made on pulsed plasma spraying associated with a synchronized injection of microsized droplets by means of an inkjet printing method.

The 7-in. freestanding diamond thermal conductive film fabricated by DC arc Plasma Jet CVD with multi-stage magnetic fields

2022 ◽  
pp. 108812
Author(s):  
Yabo Huang ◽  
Liangxian Chen ◽  
Siwu Shao ◽  
Ke Huang ◽  
Kang An ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Plasma Jet ◽  
Arc Plasma ◽  
Multi Stage ◽  
Conductive Film ◽  
Dc Arc

Inactivation of Candida albicans biofilms by atmospheric gliding arc plasma jet: effect of gas chemistry/flow and plasma pulsing

2018 ◽  
Vol 1 (1) ◽  
pp. 015001
Author(s):  
A C O C Doria ◽  
F R Figueira ◽  
J S B de Lima ◽  
J A N Figueira ◽  
A H R Castro ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Plasma Jet ◽  
Arc Plasma ◽  
Gliding Arc ◽  
Gliding Arc Plasma ◽  
Gas Chemistry ◽  
Candida Albicans Biofilms

scholarly journals Modification of MOS Devices by High-Field Electron Injection and Arc Plasma Jet Treatment

2015 ◽  
Vol 128 (5) ◽  
pp. 887-890 ◽  
Author(s):  
V.V. Andreev ◽  
G.G. Bondarenko ◽  
V.M. Maslovsky ◽  
A.A. Stolyarov
Keyword(s):  
High Field ◽  
Plasma Jet ◽  
Electron Injection ◽  
Arc Plasma ◽  
Mos Devices ◽  
Field Electron
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