Fig.1 and Fig.2 show the SEM photo

Fig.1 and Fig.2 show the SEM photo of initial and reshaping SiC fine powders. The initial fine powders present polygonal shape with prominent angularities in Fig.1; The reshaping fine powders present uniform particle morphology with round and smooth shape in Fig.2. At a result, by using the Andreasen theory of the dense packing[5], the particle morphology of the reshaping fine powders similar to that of the state of dense packing. The polygonal structure of the initial fine powders give more resistance to the surface of the contact in the process of slip casting, which decrease the fluidity of the slurry. This make the green body a lower bulk density because the polygonal structure is easy to produce porosity between the particles.