The aim of this study is to develop for thermal barrier applications a new process in which coatings exhibit properties between those of APS and EBPVD. This process includes two conventional D.C. plasma torches working in a chamber whose pressure can vary between 30 and 100 kPa. Micro-sized yttria stabilized zirconia powders are injected in both plasma jets to vaporize them, at least partially, and produce finely-structured coatings from vapor and micro-droplets deposition. The torch arrangement allows separating the vapor and the very small particles (less than 1 micron) from the partially vaporized bigger ones. The diagnostics are based on optical emission spectroscopy, pyrometry, imaging of particles trajectories and coating microstructural characterization.
Processing and properties of hybrid YSZ coating deposited by thermal plasma directed vapor deposition
Thermal Spray Crossing Borders, ITSC, International Thermal Spray Conference and Exposition, 2008 ; 1-5
DVS-Berichte ; 252
2008
5 Seiten, 8 Bilder, 6 Quellen
(nicht paginiert)
Aufsatz (Konferenz)
Englisch
Wärmesperre , Barriereschicht , Flugzeugbau , Hybridtechnik , Elektronenstrahlbedampfen , Y2O3-stabilisiertes Zirkoniumoxid , Pulver , thermische Strahlungsmessung , Emissionsspektroskopie , REM (Rasterelektronenmikroskopie) , XRD (Röntgenstrahlbeugung) , Plasmaspritzen , Superlegierung , APS (Atmospheric Plasma Spraying) , atmosphärisches Plasmaspritzen
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