[Retracted] A Comparative Study on Crack-Healing Ability of Al₂O₃/SiC Structural Ceramic Composites Synthesized by Microwave Sintering and Conventional Electrical Sintering

Figure 3

SEM figures of microwave sintered Al₂O₃/x wt.%SiC samples: (a) 5 wt. % SiC; (b) 10 wt.% SiC; (c) 15 wt.% SiC; (d) 20 wt.% SiC.