Splat is the term given to a single impacted droplet/particle, as illustrated in Fig. 2. Many overlapping splats solidify and adhere to one another to form a continuous coating layer. Thus, the splat is the basic structural building block in thermal spray coatings.
Splats are created when the accelerated, molten particles impact a substrate surface or previously deposited coating material. The arriving molten droplets are generally spherical, and on impact with the substrate surface or previously deposited coating material, they spread over and fill the underlying interstices (spaces).
The droplets become flattened, disk-like structures which, when polished in cross section, look like the coating microstructures shown in Fig. 3, 4, and 5. In these figures, the splats are seen on edge, revealing the characteristic lamellar structure of the thermal spray coating, shown schematically in Fig. 2.
This information is from ASM Handbooks Online, Vol. 5A: Thermal Spray Technology, Coating Structures, Properties, and Materials. To find this information (subscription required), click on the link below and scroll down to Figure 2.
Coating Structures: Splat
Splat is the term given to a single impacted droplet/particle, as illustrated in Fig. 2. Many overlapping splats solidify and adhere to one another to form a continuous coating layer. Thus, the splat is the basic structural building block in thermal spray coatings.
Splats are created when the accelerated, molten particles impact a substrate surface or previously deposited coating material. The arriving molten droplets are generally spherical, and on impact with the substrate surface or previously deposited coating material, they spread over and fill the underlying interstices (spaces).
The droplets become flattened, disk-like structures which, when polished in cross section, look like the coating microstructures shown in Fig. 3, 4, and 5. In these figures, the splats are seen on edge, revealing the characteristic lamellar structure of the thermal spray coating, shown schematically in Fig. 2.
This information is from ASM Handbooks Online, Vol. 5A: Thermal Spray Technology, Coating Structures, Properties, and Materials. To find this information (subscription required), click on the link below and scroll down to Figure 2.
https://dl.asminternational.org/handbooks/book/12/chapter/133714/Cold-Spray-Process
