Gas dynamic cold spray

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The cold spray is a gas dynamic method of material coating, developed in the mid-1980s in the Soviet Union by Papyrin and team. The solid state powders (1 to 50 micrometers in diameter) are accelerated in the supersonic gas jet to velocities up to 500–1000 m/s. During impact with the substrate, particles undergo plastic deformation and bond to the surface, to get a uniform coating the nozzle is scanned along the substrate. Metals, polymers, and composite materials can be deposited using cold spray. Today Cold Spray spray technologies are used in a wide range of applications, latest one are Rapid Manufacturing and Microsystems. 2007 R&D teams are active all over the world (USA, Europe, India and Korea), industrial companies active in the field are e.g. CGT(Germany), Linde AG (Germany), Linde AG(USA), HC Starck (Germany), Praxair LOXPlate (Germany), Praxair(USA), FNE-Freiberg (Germany), OBZ GmbH (Germany), ASB-Industries (USA)

• Alkhimov A. P., Papyrin A. N., Dosarev V. F., Nestorovich N. I., Shuspanov M. M. Gas dynamic spraying method for applying a coating. US patent 5302414, 1994.
• Helmut-Schmidt-Universität, Hamburg
• The cold spray materials deposition process: Fundamentals and applications

V K Champagne, US Army Research Laboratory, USA, 2005 Woodhead Publishing Limited

• Dykhuizen R.C.; Smith M.F Gas dynamic principles of cold spray. Journal Thermal Spray Technology Volume 7, Number 2, June 1998, pp. 205-212(8)
• parameter window for cold spray deposition
• Team Prof. Smurov Enise DIPI France
• Cold Gas Spray in Australia
• International Status Report 2004
• new developments in cold spraying 2006

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