Journal of Japan Thermal Spray Society
Online ISSN : 2186-1080
Print ISSN : 0916-6076
ISSN-L : 0916-6076
Volume 49 , Issue 2
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  • Jon AFFI, Hiroki OKAZAKI, Motohiro YAMADA, Masahiro FUKUMOTO
    2012 Volume 49 Issue 2 Pages 42-47
    Published: 2012
    Released: September 22, 2012
    Carbon fiber-reinforced plastic(CFRP)has a great potential application in aircraft fuselage due to its light weight, high specific stiffness and high specific strength. It is crucial to coat the CFRP surface with an electrically conductive material to avoid the damage from lightning strike. Cold spray process has been developed for metallic coating technique. In this study,aluminum coating was fabricated onto the CFRP substrate, and the using interlayer was investigated. It was difficult to fabricate cold-sprayed aluminum coating directly on the CFRP substrate. Though smaller size aluminum particles could be deposited on the CFRP substrate, but the coating was peeled off when the thickness was around 30 μm. On the other hand, it was possible to deposit aluminum coating on the CFRP substrate by plasma spray process. Our proposed structure is using a thin plasma-sprayed aluminum interlayer on the CFRP substrate before doing the cold spray. The interlayer with larger contact area could retain on the substrate, and it able to facilitate the deformation of the next incoming cold-sprayed particles to build a thick coating. The volume resistivity of cold spray coating is lower than of the plasma sprayed aluminum coating because of high process gas temperature in the latter case enhances the oxidation of sprayed particle. Therefore, lower gas temperature should be used to fabricate lower volume resistivity coating on cold spray.
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