from the conferences organized by TANGER Ltd.
Cold spray is a modern method of coating in which solid powder particles are accelerated by a supersonic gas jet and on impact with the substrate they deform plastically and adhere to the surface. This principle of coating formation is dependent on the critical velocity of the flying particles, which is influenced, among other things, by the distance of the coated material from the nozzle end. Therefore, this work investigates the effect of standoff distance on the microstructure of austenitic stainless steel coatings deposited by cold spray technology. The Cold Spray CS EvoII 6/11 equipment was used in the experiment, using two convergentdivergent nozzles that differ from each other in length and expansion ratio. Different stand-off distances (10 mm, 30 mm, and 50 mm) were used in this work and their effect on the properties of the resulting coatings was observed, such as in particular the quality of the interface between the base material and the deposited coating, porosity, roughness, and coating thickness. The results showed that the stand-off distance of the coating significantly affects the quality and properties of the coating, with the best results obtained for samples deposited at a stand-off distance of 30 mm.
Keywords: Cold Spray technology, 316L, stand-off distance© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.