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Al2O3-TiO2 coatings deposition by intermixed and double injection SPS concepts
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SYSNO ASEP 0559808 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Al2O3-TiO2 coatings deposition by intermixed and double injection SPS concepts Author(s) Nowakowska, M. (PL)
Sokolowski, P. (PL)
Tesař, Tomáš (UFP-V) ORCID
Mušálek, Radek (UFP-V) RID, ORCID
Kielczawa, T. (PL)Number of authors 5 Source Title Materials Science-Poland - ISSN 2083-134X
Roč. 39, č. 4 (2021), s. 599-614Number of pages 16 s. Language eng - English Country PL - Poland Keywords alumina-titania coatings ; double injection ; intermixed suspension ; microstructure ; suspension plasma spraying Subject RIV JG - Metallurgy OECD category Materials engineering R&D Projects GA19-10246S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFP-V - RVO:61389021 UT WOS 000788837800001 EID SCOPUS 85129703861 DOI https://doi.org/10.2478/msp-2021-0046 Annotation This work focuses on the study on the novel hybrid method of simultaneous spraying from two different materials (Al2O3 and TiO2) by means of suspension plasma spraying (SPS) using submicron powder and water suspension. The goal was to attempt the deposition of intermixed alumina-titania coatings, namely: Al2O3 + 3 wt.% TiO2, Al2O3 + 13 wt.% TiO2, and Al2O3 + 40 wt.% TiO2. Such compositions are already used but in the form of conventionally plasma sprayed coatings, with micrometer-sized powder. Meanwhile, the injection of feedstocks with submicron-sized particles has not been established yet. In particular, this paper uses two routes of feedstock injection, (i) with the use of an intermixed suspension and (ii) a double injection of separate suspensions. The attention was paid to the characterization of the feedstock materials, description of deposition parameters as well as the morphology, microstructure, and phase composition of the obtained coatings. Among all coatings, Al2O3 + 40 wt.% TiO2 sprayed with double injection contained the most homogeneously distributed and melted splats. The results from this work demonstrate the possibility of coating deposition both by intermixed and double injection concepts but also the need for the further application-relevant optimization, related to the presence of intercolumnar gaps in the microstructure of the coatings. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2023 Electronic address https://www.sciendo.com/article/10.2478/msp-2021-0046
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