D. Klein, D. Sokolov, C. Coddet, University of Technology Belfort-Montbeliard, Belfort Cedex, France; F. L. Toma, S. Lamy, G. Bertrand, University of Technology Belfort-Montbeliard, Belfort, France; C. Meunier, University of Franche Comte, Montbeliard cedex, France
Nano-structured titania coatings were elaborated via vacuum plasma spraying (VPS) using a reconstituted nanosized anatase feedstock powder prepared via the spray drying technique. The plasma spraying process was carried out in Ar and Ar/H2 plasmas under different pressures that varied from 600 mbar to 1 mbar. The microstructure and cristallinity of the coatings were investigated by SEM, XRD and thermal analysis. Several microstructures were produced function of the plasma operating parameters. Significant structural transformations of the initial TiO2 anatase to rutile as well as the presence of the non-stoichimetric oxides (TiO2-x Magneli phases) were identified. Relationships between the plasma gases/pressure conditions and the characteristics of the TiO2 sprayed coatings were established.
The plasma spraying process was carried out in Ar and Ar/H2 plasmas under different pressures that varied from 600 mbar to 1 mbar. The microstructure and cristallinity of the coatings were investigated by SEM, XRD and thermal analysis.
