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CS8.1 Recent Developments and Prospects in Cold Spraying

Wednesday, May 23, 2012: 8:00 AM
Room 335 AB (Hilton Americas Houston )
Prof. Thomas Klassen , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Dr. Frank Gärtner , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mr. Kurt Binder , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mrs. Kerstin-Raffaela Ernst , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mr. Kouichiro Onizawa , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Mr. Henning Gutzmann , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Dr. Jan-Oliver Kliemann , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Prof. Hamid Assadi , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Dr. Tobias Schmidt , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Prof. Heinrich Kreye , Helmut Schmidt University, University of the Federal Armed Forces Hamburg, Hamburg, Germany
Cold spraying is a well-established coating technology for a wide variety of materials and applications. Improvements of the cold spray equipment and the wider range of accessible process parameters have a significant impact on the quality of coatings. Higher gas temperatures are particularly important for processing high-strength materials and yield two positive effects: (i) the velocity of sound, which is reached in the smallest cross section of the nozzle, increases, and thus the achievable particle velocity and (ii) thermal softening of particle or substrate significantly decreases the required critical velocity.

The range of currently sprayable materials and selected promising applications will be presented. Respective process and impact parameters for achieving high quality coatings can be determined on the basis of a single unifying process variable, using a new commercial software package. Critical materials, currently at the edge of deposition, will be discussed as an outlook for further developments in spray equipment.

See more of: Theory & Modeling Session
See more of: Cold Spray