Influence of Grit Blasting on the Interface Roughness and Adhesion Strength of Cold Sprayed Copper Coatings

Monday, May 11, 2015: 5:10 PM
Room 102C (Long Beach Convention and Entertainment Center)
Dr. Roman Gr. Maev , University of Windsor, Windsor, ON, Canada
Dr. Volf Leshchynsky , University of Windsor, Windsor, ON, Canada
Dr. Emil Strumban , University of Windsor, Windsor, ON, Canada
Dr. Dmitry Dzhurinskiy , University of Windsor, Windsor, ON, Canada
Dr. Elena Maeva , University of Windsor, Windsor, ON, Canada
Surface preparation is very important for reliable adhesive bonding of cold sprayed coatings to the substrate.  In this work, the grit blasting of low-carbon  A516 steel substrates with Al2O3 particles was studied and the roughness parameters Ra and Rt  of the grit blasted surfaces were then measured. The influence of alumina grit size on the roughening of the A516 steel substrate, and the resulting effect on the roughness of the Cu coating – steel interface were studied. The results showed that variations of the grit blast size had significantly affected the resultant surface roughness of the substrate. The adhesive strength of the formed copper coatings on A516 steel substrates didn’t depend on the surface roughness and hardness of the base material. The adhesive strength about 200MPa was achieved.  The specific features of the Cu coating-A516 steel interface topography were examined and discussed.
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See more of: Fundamentals/R&D