Optimization of radio-frequency plasma parameters for spheroidization of zirconium oxide powders

Based on numerical 3D simulation of induction coupled plasma, optimal conditions are found for spheroidization of “difficult to process” ceramic powders. Yttria-stabilized zirconium oxide powder, widely used for thermal barrier coatings, was chosen as an example. Transparent and matt type of spheric...

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Bibliographic Details
Published in:Surface & coatings technology 2020-01, Vol.382, p.1, Article 125196
Main Authors: Nagulin, K., Nazarov, R., Efimochkin, I., Gilmutdinov, A.
Format: Article
Language:English
Subjects:
Arc deposition
Ceramic coatings
Ceramic powders
Computer simulation
Optimization
Plasma
Plasma deposition
Plasma processing
Plasma spheroidization
Radio frequency plasma
Spheroidizing
Thermal barrier coating
Thermal barrier coatings
Yttria-stabilized zirconia
Yttrium oxide
Zirconium oxide
Zirconium oxides
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Summary:Based on numerical 3D simulation of induction coupled plasma, optimal conditions are found for spheroidization of “difficult to process” ceramic powders. Yttria-stabilized zirconium oxide powder, widely used for thermal barrier coatings, was chosen as an example. Transparent and matt type of spherical particles are obtained as a result of the plasma processing. An interpretation is given for the observed phenomenon. The processed powders were tested and compared with alternatives by means of their arc plasma deposition to create a barrier coating. •Using modeling, the plasma spheroidization system of ZrO2 powder was optimized.•It has shown that feeder's position in plasma affects trajectories of particles.•In certain cases particles may fall into a zone of stagnant vortices.•It has shown that the quality of commercial and spheroidized powder is comparable.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2019.125196