Enhancement of low pressure cold sprayed copper coating adhesion by laser texturing on aluminum substrates

Wolfgang Knapp; Vincent Gillet; Bruno Courant; Emilie Aubignat; Sophie Costil; Cécile Langlade

doi:10.1117/12.2250870

22 February 2017 Enhancement of low pressure cold sprayed copper coating adhesion by laser texturing on aluminum substrates

Wolfgang Knapp, Vincent Gillet, Bruno Courant, Emilie Aubignat, Sophie Costil, Cécile Langlade

Author Affiliations +

Proceedings Volume 10097, High-Power Laser Materials Processing: Applications, Diagnostics, and Systems VI; 100970P (2017) https://doi.org/10.1117/12.2250870
Event: SPIE LASE, 2017, San Francisco, California, United States

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.

Citation Download Citation

Wolfgang Knapp, Vincent Gillet, Bruno Courant, Emilie Aubignat, Sophie Costil, and 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); https://doi.org/10.1117/12.2250870

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available