Improvement of the deposition efficiency and adhesion strength of cold sprayed fluoropolymer coating by laser surface texturing of the substrate

Wesley Lock Sulen, Chrystelle Bernard, Shinya Onodera, Junichi Ishizaki, Nicolas Mary, Yuji Ichikawa, Kazuhiro Ogawa

研究成果: ジャーナルへの寄稿学術論文査読

抄録

High-performance polymer cold-spraying is attracting the interest of many for its economical, time-saving, and environmentally safe features in comparison to traditional thermal spraying processes. The cold spray process allows applying functional polymer coatings on a similar or dissimilar material surface for protective measures or additional functionalities. However, its practical use has been restricted by inherently low deposition efficiency associated with a weak interfacial adhesion strength. In this study, fluoropolymer powder mixed with 5 wt% of nano-alumina was cold-sprayed on laser-textured carbon steel substrates. A thorough analysis of the particle deposition as a function of the spray parameters (gas temperature, pressure, pass number, traverse speed) was performed to highlight the effect of the laser-texturing (groove geometry, laser pitch, pattern) on the deposition efficiency and adhesion strength. By laser-texturing the substrate, the deposition efficiency increases up to 60 %, and the adhesion strength reaches 1.25 MPa. Thus, while the addition of nano-alumina enhances the interparticle cohesion, a laser-textured substrate promotes the mechanical interlocking at the particle/substrate interface.

本文言語英語
論文番号130489
ジャーナルSurface and Coatings Technology
478
DOI
出版ステータス出版済み - 2024 2月 29

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