**3.4 Effect of grain boundaries and interfaces on the sputtering yield**

In order to analyze the grain boundaries effect on the sputtering yield, the hypereutectic alloy was irradiated with two doses, 80 and 380 dpa, and the grain boundaries effect was evaluated using Force Atomic Microscopy. **Figure 11** shows AFM images of the irradiated region with both regions, the height profile, and the correspondent image of the surface irradiated at both doses, the image at 80 dpa is shown in **Figure 11(a)** and the image at 380 dpa shown in **Figure 11(b)**.
