Title: Characterization of a zinc coating on a hybrid composite
Authour names: XXXXXXXXXXXX
Affliation: Département De Sciences Des Matériaux
Laboratoire de Sciences et Génie des Matériaux, Faculté de Génie Mécanique et Génie des Procédés –USTHB
BP32 – 16111 El Alia, Bab Ezzouar Alger Algérie.
ABSTRACT :
The good specific mechanical properties of composite materials with a polymer matrix (PMC) provide their more specific applications in aeronautics and aerospace [1]. However, their use is limited by poor surface properties, such as operating temperature, flammability and resistance to wear and erosion [2]. Several attempts have been made to use thermal spraying to produce coatings on (PMC) [3]. The thermal stability of the matrices is a challenge to develop this technique. The molten droplets coatings can degrade thermally epoxy and damage the delicate carbon fibers [4]. In this work, a method of modifying a composite surface has been adopted which comprises introducing a mixture of a metal powder which can reduce the impact of thermal spraying particles at the moment of formation of the metal coating.
For this, we produced a composite substrate from an epoxy resin and carbon fiber taffeta . Furthermore, in order to see the influence of the charges on the properties of the top layer, we loaded a metal powder composed of copper and steel embedded in an epoxy matrix.
The samples thus obtained were characterized by optical microscopy, SEM and image analysis measuring roughness. Based on the results obtained, we can conclude that thermal spraying allows the production of metallic coatings on PMC composites. The choice of the zinc has been identified as compatible with the substrate material due to its ductility and low melting temperature close to that of the polymers. The layer containing the copper particles and steel well protects the composite material CMP, the impact of hot particles, it will prevent the rupture of brittle carbon fibers.
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