Abstract No.:
5203

 Title:
Metals cold-sprayed on ceramic substrates thanks to laser texturing surface pre-treatment

 Authors:
Robin Kromer / University Franche-Comté , France
Y. Danlos / Univ. Bourgogne Franche-Comté, UTBM, IRTES EA7274, France
S. Costil*/ University Bourgogne Franche-Comté, France
H. Liao/ Univ. Bourgogne Franche-Comté, UTBM, IRTES EA7274, France

 Abstract:
Cold spray is capable of depositing a variety of metals as dense coatings onto metal surfaces. Copper, stainless steel, nickel, chromium, aluminum, cobalt, titanium, niobium and other metals can all be deposited, as well as alloys based on these metals and braze powders. The particle-substrate contact time, contact temperature and contact area upon impact are parameters influencing physico-chemical and mechanical bonds. The resultant bonding is created due to plastic deformation and temperature at the interface, so metal coating cannot be sprayed on to rough ceramic substrates. To promote such material mixture, laser surface texturing has been used as surface pre-treatment to create specific topography. Metal-ceramic has demonstrated a non-deformation of the substrate minimizing intimate bonds. Particle compressive states indicate anchoring mechanisms for laser textured surface. Consequently, cold spray coating parameters depend on the target material and a methodology can be established with particle parameters (diameters, speeds, temperatures) and particle/substrate properties to adapt the surface topography. Mechanical adhesion is a key issue in cold spray process. Laser surface texturing is so a promising tool to adapt the surface to enhance adhesion. Metalization process can be achieved.

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