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Review of Functionally Graded Thermal Sprayed Coatings

Abstract : The paper briefly describes major thermal spray techniques used to spray functionally graded coatings such as atmospheric plasma spraying, high velocity oxy-fuel spraying, suspension and solution precursor plasma spraying, and finally low and high pressure cold gas spray method. The examples of combined spray processes as well as some examples of post spray treatment including laser and high temperature treatments or mechanical one, are described. Then, the solid and liquid feedstocks used to spray and their properties are shortly discussed. The reviewed properties of functional coatings include: (i) mechanical (adhesion, toughness, hardness); (ii) physical (porosity, thermal conductivity and diffusivity, thermal expansion, photo-catalytic activity), and; (iii) bioactivity and simulated body fluid (SBF) corrosion. These properties are useful in present applications of functionally graded coatings as thermal barriers, the bioactive coatings in prostheses, photo-catalytic coatings in water treatment, coatings used in printing industry (anilox and corona rolls). Finally, some of the future possible fields of functional thermal sprayed coatings applications are discussed, e.g., to coat polymer substrates or to use the cheap technology of low pressure cold gas spray method instead of expensive technology of vacuum plasma spraying to obtain bond coatings.
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https://hal-unilim.archives-ouvertes.fr/hal-03281533
Contributeur : Beatrice Derory <>
Soumis le : jeudi 8 juillet 2021 - 12:02:40
Dernière modification le : vendredi 9 juillet 2021 - 04:30:25

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Leszek Łatka, Lech Pawlowski, Marcin Winnicki, Pawel Sokołowski, Aleksandra Małachowska, et al.. Review of Functionally Graded Thermal Sprayed Coatings. Applied Sciences, MDPI, 2020, 10 (15), pp.5153. ⟨10.3390/app10155153⟩. ⟨hal-03281533⟩

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