Effect of electric arc plasma jet treatment on porous silicon properties

1996 ◽  
Author(s):  
V. I. Beclemishev ◽  
V. M. Maslovsky ◽  
Alexander I. Belogorokhov ◽  
G. Y. Pavlov ◽  
V. A. Karavanskii ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Plasma Jet ◽  
Electric Arc ◽  
Arc Plasma

Effect of Electric ARC Plasma Jet Treatment on Mos Structure Reliability

1995 ◽  
Vol 391 ◽  
Author(s):  
V. M. Maslovsky ◽  
G. Ya. Pavlov
Keyword(s):  
Structural Changes ◽  
Plasma Jet ◽  
Electric Arc ◽  
Constant Current ◽  
Breakdown Field ◽  
Ir Absorption ◽  
Arc Plasma ◽  
Mos Structure ◽  
Structure Reliability ◽  
Constant Current Charge

AbstractThe effect of electric arc plasma jet treatment (APJT) on MOS structure reliability has been investigated. Si/SiO2/Si*/Al structures have been studied using the technique of constant current charge to breakdown before and after APJT. The study showed that APJT can improve MOS structure reliability: constant current charge to breakdown Qbd increased to more than 5 C·cm-2 and breakdown field Ebd increased to more than 20 MV/cm. This result was attributed to a structural modification of SiO2 and its interfaces as a result of APJT. Evidence for these structural changes is the appearance of additional SiO2 IR absorption peak which was observed by us.

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

Plasma parameters in atomic-emission spectral analysis of phosphate concentrates of the fission products

2019 ◽  
Vol 85 (2) ◽  
pp. 17-22
Author(s):  
M. I. Khamdeev ◽  
E. A. Erin
Keyword(s):  
Spectral Analysis ◽  
Chemical Composition ◽  
Reference Materials ◽  
Fission Products ◽  
Atomic Emission ◽  
Electric Arc ◽  
Physical Parameters ◽  
Arc Plasma ◽  
Atomic Emission Spectral Analysis ◽  
Excitation Processes

Physical parameters of electric arc plasma as well as their time dependences are calculated when analyzing phosphate precipitates of the fission products of irradiated nuclear fuel. Phosphate concentrates of the fission products are known for their complex chemical composition and high thermal and chemical stability. Hence, direct atomic emission spectral analysis of phosphate powders without transferring them into solutions is advisable. Different conditions of sample preparation and synthesis of the reference materials determine the different chemical forms of the elements to be determined. This, in turn, affects the kinetics of their evaporation in the electrode crate and excitation processes in the plasma. The known mechanisms of those processes cannot always be transferred to specific conditions of the given method of analysis thus entailing the necessity of studying the effect of the samples chemical composition on the results of determination, proper choice of spectroscopic carriers, detailed study of spectra excitation processes in spectral analysis, and analysis of the physical parameters of the electric arc plasma. We used the lines Zn I 307.206 nm and Zn I 307.589 nm to measure the effective temperature of the central hot sections of the arc in a range of4500 - 6500 K. NaCl, BaCl2 and NaCl + T1C1 were studied to reduce the effect of the sample elemental composition on excitation conditions of the spectra and their stabilization as a spectroscopic carrier. In control experiments we used carrier-free samples. The coincidence of the values of the plasma physical parameters within the measurement error not exceeding 20%, as well as the identity of the nature of the kinetic curves for samples of phosphate precipitates and synthetic reference materials prove their correctness. The result of the study substantiate correctness of the direct atomic-emission spectral procedure in analysis of phosphate concentrates of fission when using synthetic reference materials.

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.

Recent Advances in Electric Arc Plasma Generation Technology

ARS Journal ◽  
1961 ◽  
Vol 31 (1) ◽  
pp. 4-17 ◽  
Author(s):  
RICHARD R. JOHN ◽  
WILLIAM L. BADE
Keyword(s):  
Electric Arc ◽  
Arc Plasma ◽  
Plasma Generation ◽  
Recent Advances ◽  
Generation Technology

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

Deposition of large area high quality diamond wafers with high growth rate by DC arc plasma jet

2000 ◽  
Vol 9 (9-10) ◽  
pp. 1673-1677 ◽  
Author(s):  
H. Guo ◽  
Z.L. Sun ◽  
Q.Y. He ◽  
S.M. Du ◽  
X.B. Wu ◽  
...  
Keyword(s):  
Growth Rate ◽  
High Growth ◽  
Plasma Jet ◽  
High Growth Rate ◽  
Arc Plasma ◽  
Large Area ◽  
High Quality ◽  
Dc Arc
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