| Properties of Cold Spray Nickel Based Coatings | ||
| Mr. Patrick Richer1, B. Jodoin1, L. Ajdelsztajn2, E. Sansoucy1 and Dr. G. E. Kim3, 1Department of Mechanical Engineering, University of Ottawa, 161 Louis Pasteur, Room A205, Ottawa, ON K1N 6N5, Canada, 2Dept. of Chemical Engineering and Material Science, University of California, Davis, 1 Shields Avenue, Davis, CA 95616, 3Perpetual Technologies, Inc., 38 Place du Commerce, Suite 10-163, Ile des Soeurs, QC H3E 1T8, Canada
Cold Spray is a relatively new coating process that uses a supersonic gas flow to accelerate fine powder particles above a given critical velocity. Upon impact, the particles plastically deform and adhere to the substrate to form a coating. In recent years, nickel based alloys used in coating applications have been the focus of many studies, particularly in the aerospace industry. Their inherent corrosion and oxidation resistant properties have made them especially attractive for use as the metallic bond coat found in thermal barrier coating systems. The present study examines the properties of nickel based alloy coatings produced by the cold spray deposition process. Evaluation of the coating properties is achieved by means of electron microscopy, porosity measurements and adhesion testing. A correlation between coating properties and in-flight particle velocity measurements is also presented. | ||