M. Watanabe, S. Kuroda, National Institute for Materials Science (NIMS), Tsukuba, Japan; S. Kishimoto, K. Shinoda, National Institute for Materials Science, Ibaraki, Japan
Recently, the thermal spray community has focused considerable attention on cold spray and warm spray techniques, in which the temperatures of sprayed particles are kept under those melting points and adhesion occurs based on the impact phenomenon between a solid particle and a substrate. The mechanisms of adhesion are still unclear but the mechanical strain at the interface is considered to be one key factor. In this work, the strain fields around the impacted particle sprayed by HVOF and warm spray were measured by electron moiré method. The correlations among adhesion, strain field and particle velocity were investigated.
Recently, the thermal spray community has focused considerable attention on cold spray and warm spray techniques, in which the temperatures of sprayed particles are kept under those melting points and adhesion occurs based on the impact phenomenon between a solid particle and a substrate. The mechanisms of adhesion are still unclear but the mechanical strain at the interface is considered to be one key factor. In this work, the strain fields around the impacted particle sprayed by HVOF and warm spray were measured by electron moiré method. The correlations among adhesion, strain field and particle velocity were investigated.
