Effects of Processing Parameters on the Deposition of Yttria Partially Stabilized Zirconia Coating During Suspension Plasma Spray

2016 ◽  
Vol 99 (11) ◽  
pp. 3546-3555 ◽  
Author(s):  
Xiaolong Chen ◽  
Seiji Kuroda ◽  
Takuma Ohnuki ◽  
Hiroshi Araki ◽  
Makoto Watanabe ◽  
...  
Keyword(s):  
Plasma Spray ◽  
Processing Parameters ◽  
Suspension Plasma Spray ◽  
Zirconia Coating ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
Yttria Partially Stabilized Zirconia

Nitriding of yttria-stabilized zirconia in atmospheric pressure microwave plasma

2009 ◽  
Vol 24 (6) ◽  
pp. 2021-2028 ◽  
Author(s):  
R. Milani ◽  
R.P. Cardoso ◽  
T. Belmonte ◽  
C.A. Figueroa ◽  
C.A. Perottoni ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Atmospheric Pressure ◽  
Microwave Plasma ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
Zirconium Nitride ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
X Ray ◽  
Yttria Partially Stabilized Zirconia

High temperature plasma nitriding of yttria-partially-stabilized zirconia in atmospheric pressure microwave plasma was investigated. The morphological, mechanical, and physicochemical characteristics of the resulting nitrided layer were characterized by different methods, such as optical and scanning electron microscopy, microindentation, x-ray diffraction, narrow resonant nuclear reaction profiling, secondary neutral mass spectrometry, and x-ray photoelectron spectroscopy, aiming at investigating the applicability of this highly efficient process for nitriding of ceramics. The structure of the plasma nitrided layer was found to be complex, composed of tetragonal and cubic zirconia, as well as zirconium nitride and oxynitride. The growth rate of the nitrided layer, 4 µm/min, is much higher than that obtained by any other previous nitriding process, whereas a typical 50% increase in Vickers hardness over that of yttria-partially-stabilized zirconia was observed.

scholarly journals Influence of Substrate Shape and Roughness on Coating Microstructure in Suspension Plasma Spray

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 746 ◽  
Author(s):  
Fernanda Caio ◽  
Christian Moreau
Keyword(s):  
Plasma Spray ◽  
Columnar Structure ◽  
Coating Material ◽  
Suspension Plasma Spray ◽  
Yttria Stabilized Zirconia ◽  
Radius Of Curvature ◽  
Stabilized Zirconia ◽  
Coating Microstructure ◽  
Influence Of Substrate ◽  
Steel Substrates

This study investigated the influence of the substrate shape and roughness on the microstructure of suspension plasma spray (SPS) coatings. For this purpose, an yttria-stabilized zirconia (YSZ) suspension was sprayed on flat and curved stainless-steel substrates by SPS. The suspension was composed of 20 wt.% YSZ particles in ethanol. After spraying, the morphology of the coatings was characterized by scanning electron microscopy (SEM). The results showed that the substrate shape influences the amount of coating material deposited and microstructural features of the coating. The amount of coating material deposited was seen to decrease as the radius of curvature decreased. Finally, the roughness was found to influence the formation of columnar structure.

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