Lasers and Thermal Spray
| Periodical | Materials Science Forum (Volumes 638 - 642) |
|---|---|
| Main Theme | THERMEC 2009 |
| Edited by | T. Chandra, N. Wanderka, W. Reimers , M. Ionescu |
| Pages | 174-181 |
| DOI | 10.4028/www.scientific.net/MSF.638-642.174 |
| Citation | Michel Jeandin et al., 2010, Materials Science Forum, 638-642, 174 |
| Online since | January, 2010 |
| Authors | Michel Jeandin, Dimitris Christoulis, Francois Borit, Marie Helene Berger, S. Guetta, G. Rolland, Vincent Guipont, Eric Irissou, Jean Gabriel Legoux, Christian Moreau, M. Nivard, L. Berthe, M. Boustie, W. Ludwig, K. Sakaguchi, Y. Ichikawa, Kazuhiro Ogawa, S. Costil |
| Keywords | Adhesion, Al, Coating LASAT, Cold Spray, Interface, Laser, Ni, Pre-Treatment, Thermal Spray |
| Price | US$ 28,- |
Basically, thermal spray and laser processing can be considered as half brothers since they show many common features due to the use of a (more or less) high-energy source for both. Their combination can therefore be very fruitful and prominent to achieve coatings, which results in their most recent and advanced applications. In the materials processing development story, the laser will thus have moved from cutting to coating. This keynote presentation focuses on the recently-developed coupling of laser processing to cold spray). In this dual process, a cold spray gun is combined to a laser head in a single device, e.g. on a robot. Series of coating experiments using various laser irradiation conditions, primarily pulse frequency, were carried out for Al-based and Ni-based alloys. Laser pre-treatment of the substrate just prior to cold spray, was shown to be beneficial for adhesion of cold-sprayed coatings. Adhesion improvement was exhibited and studied from LASATesting (LASAT for “LAser Shock Adhesion Test”). Incidentally, through LASAT also, the role of lasers in the development of thermally-sprayed coatings can be considered as major. Results are discussed in the light of a TEM (Transmission Electron Microscope) study of the coating-substrate interface with and without laser pre-treatment.
