ABSTRACT
The cold spray (CS) process (Alkhimov et al., 1990; Vlcek et al., 2001) is a method for producing a coating by utilizing high-velocity particles. Upon impact with a substrate or previously deposited particles, the particle’s kinetic energy is converted into plastic deformation of the particles and ultimately heat. The particles do not melt and can consequently produce coatings with a minimal particle chemistry changes, oxidation, or residual stress. Previous works in the literature have developed the mechanisms by which the interaction of the high-velocity gas streams couple to the particles to produce the high-velocity particles via drag effects (Alkhimov et al., 1990, 1998) The concept of a critical particle velocity for coating formation (Alkhimov et al., 1990, 1994), dependent on the material properties of the coating materials, was developed by Alkhimov, Kosarev, and Papryrin, and has been expanded on by various authors (Alkhimov et al., 1990; Vicek et al., 2001).
