In the present work, the laser ultrasonics technique has been applied as diagnostic of the laser induced decohesion of coating. A modeling system consisting in a 304 stainless steel coated by a plasma sprayed layer was used to describe the basic measurements. These acoustic measurements were performed using an interferometric probe. It is concluded that this contactless technique can be used to follow the cleaning of oxidized materials.
"Laser removal of oxide films: laser ultrasonics diagnostic", Proc. SPIE 4760, High-Power Laser Ablation IV, (13 September 2002); doi: 10.1117/12.482089; https://doi.org/10.1117/12.482089