Creating Surface Morphologies by Cold Spraying

This chapter presents the method for the microstructuring of component surfaces by the cold spray process with fine particles. Depending on the process parameters the collision phenomena of particles with the substrate surface by this method can lead to different surface morphologies. The focus of this work is on the investigation of the manufacturing–morphology–property relationship. The mechanisms of cold spraying are explained and the investigated surfaces are discussed in detail. From CFD simulations, the velocities and temperatures of the particle before collision were obtained from the overall velocity and temperature of the gas stream. The impact phenomena were studied by FEM simulations. The microstructured surfaces were used for applications like biofilm growth or friction improvements.