Local Approach to Thermally-Sprayed Coating/Substrate Adhesion through LASAT (Laser Shock Adhesion Test)

Abstract:

Three interface factors may influence thermally-sprayed coatings adhesion: interface morphology (as usual), thermal and chemical features. It was shown that these three aspects of adhesion mechanisms are shown to be dependent and very local. It is especially true for cold spray which is one of the most promising spray processes. As this spraying technique is based on rapid deformation, cold spray coating/substrate interfaces show local morphological, thermal and chemical features, in a way that none of them can be neglected. LASAT is particularly suitable for testing these coatings because it can be applied to small areas (~1 mm²). From this, it has the outstanding advantage to be sensitive to fine-scaled phenomena responsible for coating adhesion.

• Periodical: Materials Science Forum (Volumes 539-543)
• Pages: 1067-1073
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.539-543.1067
• Online since: March 2007
• Authors: Sophie Barradas, Michel Jeandin, Régine Molins, F. Borit, L. Berthe, C. Bolis, M. Boustie, M. Arrigoni, M. Ducos
• Keywords: Adhesion, Cold Spray, Laser Shock Adhesion Test (LASAT), Plasma Spraying, PROTAL®

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