Splat formation

Fauchais, P., Fukumoto, M., Vardelle, A., and Vardelle, M. (2004) Knowledge concerning splat formation an invited review. J. Therm. Spray Technol., 13 (3), 337—360. 

S. Chandra, P. Fauchais Formation of solid splats during thermal spray deposition, J. Thermal Spray Technol., 18, 148-180 (2009). 

Polymer powder is injected into a heat source (flame or plasma) and transported to a preheated substrate. The thickness of the coating is governed by the niunber of repeated passes of the spray gim across the substrate. A large particle size or molecular weight distribution may facilitate the formation of numerous heterogeneities within the microstructure of the coated siuface such as creating voids, trapped gasses, immelted particles, splats and pyrolized material. 

Regime IV formation of mixed oxide layer and no evidence for the splat tip fracture at high velocity and low load. 

---