Cold Spraying Activation Using an Abrasive Admixture

In the present study, on the basis of a two-probability model we theoretically analyze the influence of surface erosion and activation due to abrasive particles impacting on the substrate (coating) surface on the total deposition efficiency of a sprayed mixture of abrasive and metal particles. Relations for the total deposition efficiency derived with regard to the activation effect due to abrasive particles were obtained. In the experiments, the deposition efficiency was measured as a function of the abrasive (SiC) concentration in the initial mixture with copper powder, the size of the abrasive particles, and the working-gas (air) stagnation temperature. Modeling data are compared to the present and previously published experimental data, and a good agreement between the data is shown.