22 February 2017 Enhancement of low pressure cold sprayed copper coating adhesion by laser texturing on aluminum substrates
Author Affiliations +
Abstract
Surface pre-treatment is fundamental in thermal spraying processes to obtain a sufficient bonding strength between substrate and coating. Different pre-treatments can be used, mostly grit-blasting for current industrial applications. This study is focused on Cu-Al2O3 coatings obtained by Low Pressure Cold Spray on AW5083 aluminum alloy substrate. Bonding strength is measured by tensile adhesion test, while deposition efficiency is measured. Substrates are textured by laser, using a pattern of equally spaced grooves with almost constant diameter and variations of depth. Results show that bonding strength is improved up to +81% compared to non-treated substrate, while deposition efficiency remains constant. The study of the samples after rupture reveals a modification of the failure mode, from mixed failure to cohesive failure. A modification of crack propagation is also noticed, the shape of laser textured grooves induces a deviation of cracks inside the coating instead of following the interface between the layers.
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wolfgang Knapp, Wolfgang Knapp, Vincent Gillet, Vincent Gillet, Bruno Courant, Bruno Courant, Emilie Aubignat, Emilie Aubignat, Sophie Costil, Sophie Costil, Cécile Langlade, Cécile Langlade, } "Enhancement of low pressure cold sprayed copper coating adhesion by laser texturing on aluminum substrates", Proc. SPIE 10097, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VI, 100970P (22 February 2017); doi: 10.1117/12.2250870; https://doi.org/10.1117/12.2250870
PROCEEDINGS
13 PAGES


SHARE
RELATED CONTENT


Back to Top