The effect of the applied field on the density of the resultant composites is shown in Fig. 2. It is seen that the density increases with increasing the field at beginning, and reaches the maximum value to be ∼96% of the theoretical density at the applied filed = 100 V/cm Further increasing the applied field, the density remained the same.The increased density is due to the accelerated mass transport with the applied field [16]. At the same current density limitation, the power spike increases with increasing the applied filed, leading to higher temperatures in the sample. The density of the sample prepared by conventionally sintering at 1400◦C for 2 h is also included Fig. 2, which is much lower than that for the flash sintered ones. The results clearly demonstrate that the flash-sintering is a promising technique to synthesize whisker reinforced composites.