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Effect of Fluctuations of DC Current on Properties of Plasma Jet Generated in Plasma Spraying Torch with Gerdien Arc
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SYSNO ASEP 0330834 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Effect of Fluctuations of DC Current on Properties of Plasma Jet Generated in Plasma Spraying Torch with Gerdien Arc Author(s) Hrabovský, Milan (UFP-V) RID
Kopecký, Vladimír (UFP-V) RID
Chumak, Oleksiy (UFP-V) RID
Kavka, Tetyana (UFP-V) RID
Mašláni, Alan (UFP-V) RID
Sember, Viktor (UFP-V) RID
Ctibor, Pavel (UFP-V) RID, ORCIDSource Title High Temperature Materials and Processes - ISSN 1093-3611
Roč. 13, č. 2 (2009), s. 229-240Number of pages 12 s. Publication form web - web Language eng - English Country US - United States Keywords Plasma torch ; dc arc ; plasma jet ; fluctuations ; plasma spraying Subject RIV BL - Plasma and Gas Discharge Physics CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000274202100011 DOI 10.1615/HighTempMatProc.v13.i2.110 Annotation Two different power supplies used for dc arc plasma spraying unit with water stabilized plasma torch were compared - classical thyristor controlled unit with the frequency of the current ripple 300 Hz and the rectifier with the high frequency converter and frequency of the current modulation 30 kHz. For the both types of power supply the arc characteristics were measured, time averaged plasma jet properties were determined from spectroscopic measurements and plasma jet fluctuations were analysed on the basis of diagnostics with an array of high frequency photodiodes. The properties of coatings sprayed with the two power supplies were compared. While time averaged profiles of plasma jet were the same for the both power supplies, the fluctuations of plasma jet differed substantially. Also the dynamic arc voltage characteristics of the arc were different and could be described by modified Cassie equation. The differences of properties of TiO2 coatings were not significant. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2010
Number of the records: 1