Abo Bibliothek: Guest
Digitales Portal Digitale Bibliothek eBooks Zeitschriften Referenzen und Berichte Forschungssammlungen
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Druckformat: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v11.i2.10
pages 161-174

INFLUENCE OF VOLTAGE FLUCTUATIONS RELATED TO PLASMA TORCH WORKING CONDITIONS ON ZIRCONIA PARTICLE THERMAL TREATMENT

E. Nogues
SPCTS Laboratory, University of Limoges, 123 av A. Thomas, 87060 Limoges Cedex; and BOC Edwards, 224 bd J. Kennedy, 91105 Corbeil-Essonnes Cedex, France
Michel Vardelle
LMCTS-URA 320, University of Limoges, 123 Avenue Albert Thomas -87060 Limoges Cedex - France
Pierre Fauchais
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France
P. Granger
BOC Edwards, 224 bd J. Kennedy, 91105 Corbeil-Essonnes Cedex, France

ABSTRAKT

The microstructure of plasma sprayed coatings is strongly linked to particle trajectories depending among other parameters on arc root fluctuations. The latters depend on the torch anode-nozzle shape and internal diameter, the plasma forming gas composition and flow rate, and the anode erosion.
Experiments were performed with yttria partially stabilized zirconia (8 wt% yttria) particles with a size distribution between 5 to 25 μm and either a PTF4 or a 3MB GE Sulzer-Metco torch. The PTF4 torch was fed with an Ar-Mb mixture and an arc current of 600 A, while the 3MB torch was fed with N2-H2 mixture with an arc current of 500 A. Particle mean temperatures and mean velocities were measured to evaluate the influence of voltage fluctuations on the treatment.
This study shows that the torch working parameters, except the arc current, have nearly the same effects on the arc voltage fluctuations for the both torches. The 3MB torch voltage fluctuations are more important than those for a PTF4 torch, but they are less affected by the variations of spray parameters. Furthermore, the fluctuations of particle temperatures and velocities versus the voltage fluctuations are not the same.


Articles with similar content:

EFFECT OF TIME-DEPENDENT D.C. PLASMA FLOW ON PARTICLE TREATMENT
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.10, 2006, issue 2
D. Guenadou, C. Bourgeois, Erick Meillot
OPTICAL DIAGNOSTICS TO CONTROL ON LINE MELTING OF SILICON MATERIAL TREATED BY THERMAL PLASMA PROCESS. NEW IMPROVEMENTS FACED WITH SEVERE CONDITIONS.
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.9, 2005, issue 1
Jacques Amouroux, Amaury Poidatz, Sergey V. Dresvin, S. Darwiche, Daniel Morvan, E. Francke, M. Benmansour
PLASMA SPRAYED COATINGS OF MECHANOFUSED ALUMINA-STEEL PARTICLES
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes, Vol.14, 2010, issue 4
Helene Ageorges, Alain Grimaud, Pierre Fauchais
PLASMA SPRAYED COATINGS OF MECHANOFUSED ALUMINA-STEEL PARTICLES
Progress in Plasma Processing of Materials, 1999, Vol.1, 1999, issue
Helene Ageorges, Alain Grimaud, Pierre Fauchais
IDENTIFICATION OF LOCAL AND GLOBAL OSCILLATIONS IN A PLAS~A JET
Progress in Plasma Processing of Materials, 1999, Vol.1, 1999, issue
V. Nenicka, J. Hlina