图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
高温材料处理:国际期刊
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN 打印: 1093-3611
ISSN 在线: 1940-4360

高温材料处理:国际期刊

DOI: 10.1615/HighTempMatProc.v5.i4.40
13 pages

CHARACTERISATION AND ORIGIN OF ARC FLUCTUATIONS IN A F4 DC PLASMA TORCH USED FOR THERMAL SPRAYING

J.-L. Dorier
EPFL-Centre de Recherches en Physique des Plasmas, CH-1015 Lausanne, Switzerland
Ch. Hollenstein
EPFL-Centre de Recherches en Physique des Plasmas, CH-1015 Lausanne, Switzerland
A. Salito
Sulzer Metco (Switzerland) AG, Rigackerstrasse 16, CH-5610 Wohlen, Switzerland
M. Loch
Sulzer Metco (Switzerland) AG, Rigackerstrasse 16, CH-5610 Wohlen, Switzerland
G. Barbezat
Sulzer Metco (Switzerland) AG, Rigackerstrasse 16, CH-5610 Wohlen, Switzerland

ABSTRACT

The fluctuating behaviour of a Sulzer Metco F4 DC plasma gun has been investigated. The time dependencies of the arc voltage and current and of the optical emission of the plasma jet have been measured. An optical fibre inside the gun allows direct measurement of optical fluctuations of the arc. Spectral and statistical analysis of the recorded signals are presented for various working gas mixtures and for two types of gas injection. There is a dominant fluctuation frequency around 4 kHz which appears to be almost insensitive to the working parameters. It is suggested that the circuit impedance might dominate the arc physics with respect to the fluctuations at this particular frequency. On the other hand, an increase in the amplitude of the fluctuations and the increase of high frequency components in the power spectra are observed as the electrodes become worn. This might be used as a process control tool. An optical technique has been set up to estimate the jet velocity from the time of flight of the emission fluctuations.


Articles with similar content:

INFLUENCE OF PLASMA SPRAY OPERATING PARAMETERS ON ARC FLUCTUATIONS
Progress in Plasma Processing of Materials, 1999, Vol.1, 1999, issue
J. F. Coudert, Z. Duan, Joachim V. Heberlein, M. Leylavergne, Pierre Fauchais
MONITORING WATER VAPOUR PLASMA JETS ADMIXED WITH ARGON USING CHROMATIC OPTICAL SENSING TECHNIQUES
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.8, 2004, issue 2
Milan Hrabovsky, G. R. Jones, B. E. Djakov, Vladimir Kopecky
RADIATIVE TRANSFER DURING A PULSED LIGHTNING ARC ON A METALLIC PLATE
International Heat Transfer Conference 16, Vol.22, 2018, issue
C. Zaepffel, R. Sousa Martins, Philippe Riviere, Anouar Soufiani, L. Chemartin
OES DIAGNOSTICS OF NON-STATIONARY ELECTRIC ARC/JET PLASMAS HAVING NO AXIAL SYMMETRY
Progress in Plasma Processing of Materials, 1999, Vol.1, 1999, issue
E. Ershov-Pavlov
DIAGNOSTICS OF ABSORBING INHOMOGENEOUS PLASMAS BY SPECTRAL LINE EMISSION
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.8, 2004, issue 4
E. Ershov-Pavlov, K. Catsalap, K. L. Stepanov