This is also proved by the SEM micrograph (Fig. 5) realized in a pore after 3 h sintering of the platelets. Pores guarantee that the step of densification does not occur and then that only spheroidization (step 1), rearrangement into a close packing as much as possible (step 2) and grain growth (step 4) take place. Thus, the memory of the first step of spheroidization is maintained. And that is what we observed by SEM measurements made in the pore of an initial powder composed of platelets that do not easily densify. Particles look like spheres in the pore. This is clearly visible in Fig. 5, again a proof of this step of spheroidization.