Cold Gas Spray as a repair technique

Cold Gas Spray (CGS) is a solid-state material deposition technique that has acquired a great interest in recent years for additive manufacturing. The main advantage offered by CGS with respect to other additive technologies is that oxidation or structural changes are avoided because of the use of kinetic energy to deposit powder feedstock without melting. Furthermore, variety of materials that can be deposited makes it a very attractive technique for restore damaged or wear parts to extend its useful life. The aim of this work was to obtain coatings with high thicknesses without delamination or cracks and high adhesion for repair. With different spray parameters and deposition rates, it is possible to control the final properties of those coatings adapting them to characteristics and dimensions of substrates. The coatings obtained were characterized from structural point of view by Scanning Electron Microscopy and different properties like residual stresses resulting from the process as well as the adhesion of coatings were measured.