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Elaboration d'un composite DLC-PEEK texturé par laser femtoseconde et caractérisation de ses propriétés mécaniques et tribologiques

Abstract : Poly-ether-ether-ketone (PEEK) is a thermoplastic polymer which is often described as a high performance polymer. It is a material subjected to intensive academic and industrial researches for its remarkable bulk mechanical properties and its high chemical stability. However, PEEK is relatively sensitive to wear. The deposition of hard coatings onto materials subjected to wear is a means of protecting them from wear. Diamond-like carbon (DLC) coatings are known to be highly resistant to wear allowing to efficiently protect the substrate onto which they are deposited. Surface texturing is another means of controlling wear. Femtosecond lasers have proven to be very interesting devices in order to quickly produce high-precision textured surfaces. The work presented in this thesis aims at combining the deposition of a DLC coating and laser surface texturing in order to improve the tribological properties of PEEK. The approach was first to develop a highly adherent DLC coating able to efficiently protect the PEEK substrate from wear and then to study the influence of surface texturing, and more precisely the influence of some geometrical parameters, on the tribological behavior of the DLC-coated PEEK. Tt
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Johnny Dufils. Elaboration d'un composite DLC-PEEK texturé par laser femtoseconde et caractérisation de ses propriétés mécaniques et tribologiques. Autre. Université de Lyon, 2017. Français. ⟨NNT : 2017LYSEC040⟩. ⟨tel-01689739⟩

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