Eur. Phys. J. AP
Volume 5, Number 2, February 1999
|Page(s)||149 - 153|
|Published online||15 February 1999|
Determination of the bond strength of some microns coatings using the laser shock technique
Laboratoire de Combustion et de Détonique (UPR du CNRS 9028),
ENSMA, Téléport 2, B.P. 109, 86960 Futuroscope Cedex, France
2 Chromalloy France, avenue des Gros Chevaux, ZI du Vert Galant, 95310 Saint-Ouen-l'Aumone, France
3 Sochata, ZI-Nord, rue Maryse Bastié, B.P. 129, 86101 Châtellerault Cedex, France
Revised: 24 November 1998
Accepted: 27 November 1998
Published online: 15 February 1999
High power laser shocks with a 0.6 ns pulse duration have been used to study the debonding of coatings electrolytically deposited on the opposite face of the substrate than the one shocked. Experiments have been carried out on various substrate/coating systems such as stainless steel/copper or nickel and hastelloy X/platinum. Experimentally, a lower intensity debonding threshold has been determined for each of these systems. On the other hand, an upper threshold above which a systematic removal of the coating is obtained has been evidenced. By the numerical simulation of these experiments, a traction range for debonding at the interface has been determined for the three systems. A significant difference for the adhesion levels of these systems has been evidenced using this method. Thus, the possibility to use the laser shock technique as a non destructive adhesion test for coatings of some tens microns is clearly demonstrated.
PACS: 47.40.Nm – Shock-wave interactions and shock effects / 68.35.Gy – Mechanical and acoustical properties; adhesion / 42.62.-b – Laser applications
© EDP Sciences, 1999
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