Effect of Parameters on Coating Density for Cold Spray Process

In this research article, Taguchi L-18 orthogonal array has been employed for depositing electro-conductive coatings by varying process and material parameters, i.e., type of powder feeding arrangement, substrate material, stagnation gas temperature, stagnation gas pressure, and standoff distance. The response parameter of the low-pressure cold spray coatings produced is measured in terms of coating density. The analyses of the raw data and signal-to-noise (S/N) ratio of the response parameters have been performed using analysis of variance (ANOVA). The optimum parameters are predicted on the basis of analyses of the raw data and S/N ratio. It was found that the experimental conditions that provide better coating density are expected to also show a strong S/N ratio. The percentage contribution of the various parameters in regard to coating density as response parameter has also been predicted. The significant parameters in order of their decreasing percentage contribution are: substrate material, standoff distance, stagnation temperature, stagnation pressure of the carrier gas, and feed arrangement of powder particles, respectively.