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Author Kavka, T. ♦ Matějíček, J. ♦ Ctibor, P. ♦ Hrabovský, M.
Source SpringerLink
Content type Text
Publisher Springer US
File Format PDF
Copyright Year ©2011
Language English
Subject Domain (in DDC) Technology ♦ Engineering & allied operations
Subject Keyword copper ♦ gas shroud ♦ hybrid water-gas plasma torch ♦ plasma facing materials ♦ plasma spraying ♦ tungsten ♦ Operating Procedures, Materials Treatment ♦ Surfaces and Interfaces, Thin Films ♦ Characterization and Evaluation of Materials ♦ Tribology, Corrosion and Coatings ♦ Analytical Chemistry
Abstract A hybrid DC arc plasma torch, combining water and gas stabilization, offers a high flexibility in plasma characteristics. These can be controlled in a wide range by the torch operational parameters, such as arc current and secondary gas flow rate. In this study, their influence on plasma spraying of tungsten and copper was investigated. To suppress the in-flight oxidation of the metals, inert gas shrouding was applied. In-flight particle diagnostics and analysis of free-flight particles and coatings was performed for spraying experiments in the open atmosphere and with argon shrouding. Both in-flight particle behavior and coating properties were found to be sensitive to the torch parameters. The application of shrouding was found to affect particle in-flight parameters, reduce the oxide content in the coatings and generally improve their properties, such as thermal conductivity. However, a different degree of these effects was observed for copper and tungsten.
ISSN 10599630
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2011-12-30
Publisher Place Boston
e-ISSN 15441016
Journal Journal of Thermal Spray Technology
Volume Number 21
Issue Number 3-4
Page Count 11
Starting Page 695
Ending Page 705

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Source: SpringerLink