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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of Fluctuations of DC Current on Properties of Plasma Jet Generated in Plasma Spraying Torch with Gerdien Arc Tvůrce(i) 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, ORCIDZdroj.dok. High Temperature Materials and Processes - ISSN 1093-3611
Roč. 13, č. 2 (2009), s. 229-240Poč.str. 12 s. Forma vydání web - web Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Plasma torch ; dc arc ; plasma jet ; fluctuations ; plasma spraying Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech CEZ AV0Z20430508 - UFP-V (2005-2011) UT WOS 000274202100011 DOI 10.1615/HighTempMatProc.v13.i2.110 Anotace 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. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2010
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