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Title: Modification of plasma-sprayed TiO2 coatings characteristics via controlling the in-flight temperature and velocity of the powder particles
Authors: Cizek, Jan
Dlouhy, Ivo
Siska, Filip
Khor, Khiam Aik
Keywords: DRNTU::Engineering::Aeronautical engineering
Issue Date: 2014
Source: Cizek, J., Dlouhy, I., Siska, F., & Khor, K. A. Modification of plasma-sprayed TiO2 coatings characteristics via controlling the in-flight temperature and velocity of the powder particles. Journal of thermal spray technology, 23(8), 1339-1349.
Series/Report no.: Journal of thermal spray technology
Abstract: The study presents a comprehensive research on the plasma spray fabrication of TiO2 coatings with microstructural properties adjustable via controlling the respective in-flight properties of the feedstock particles. The in-flight properties can be, in return, governed by tuning the plasma system spray parameters. By determining and linking the two interrelationships, a connection between the important coating characteristics (composition, microstructure, surface and mechanical properties) to the plasma system settings was established. It was shown that by changing the values of six parameters representing the flexibility of the plasma system, the temperatures and velocities of the particles within the jet can be altered from 2125 to 2830 K and 137 to 201 m s−1, respectively. The values of the in-flight temperature critically influenced the efficiency of the coating build-up (values ranging from 8 to 84 μm per 1 torch pass) and the content of anatase phase in the fabricated coatings (0-5.8%), while the in-flight velocity of the TiO2 particles was found to be connected to the porosity of the coatings (ranging from 14.4 to 26.2%) and the adhesion strength at the coating-substrate interface (2.6 × difference).
DOI: 10.1007/s11666-014-0132-z
Rights: © 2014 ASM International. This paper was published in Journal of Thermal Spray Technology and is made available as an electronic reprint (preprint) with permission of ASM International. The paper can be found at the following official DOI: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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