Product Code: ICAL08_M701

Coating Deposition Using Laser Induced Spallation
Authors:
L. Berthe, Laboratoire pour l'Application des lasers de Puissance (UPR CNRS 1578); Arcueil France
M. Boustie, Laboratoire De Combustion Et De Detonique, Upr Cnrs N�9028; Futuroscope France
M. Jeandin, Ensmp/Evry; Evry France
S. Barradas, Ensmp/Evry; Evry France
T. De Resseguier, Laboratoire De Combustion Et De Detonique, Upr Cnrs N�9028; Futuroscope France
S. Guetta, Ensmp/Evry; Evry France
P. Combis, Cea; Bruy�Res-Le-Ch�Tel France
Presented at ICALEO 2008

This paper presents a new technique called CODLIS (COating Deposition using Laser Induced Spallation) using laser induced spallation to deposit coatings. It consists in the production of coatings using as particles, spall induced and accelerated by shocks induced by laser ( Power density range : TW/cm2 and pulse duration : 2-5 ns). This technique offers a new perspective to study physical phenomenon occurring in highly dynamic processes of deposition like cold spray. Indeed, these processes can not be studied due to the wide velocities range and size (50-100 um) of particles in the jet. CODLIS allows the control and the measurement of elementaries particles parameters because only one spall impact is produced by shot. The technique allows also the sample recovering for the local analysis of interface after the impact. This present paper demonstrates CODLIS for Cu coating on Al substrate. The flight velocity (800 m/s) of Cu spall (thickness: 50 um) has been measured with Velocity Interferometer System for Any Reflector (VISAR). Experimental velocity profiles have been reproduced by simulations including laser/matter interaction and shock wave propagation codes. Spall(Aluminum)-target substrate(Copper) interface observation evidences the adherence of coating induced by thermal effect induced by spall impact.